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Research Articles

Effect of different storage media on elemental analysis and microhardness of cervical cavity margins restored with a bioactive material: Hoda Saleh Ismail, Brian Ray Morrow, Ashraf Ibrahim Ali, Rabab Elsayed Elaraby Mehesen, Salah Hasab Mahmoud, Franklin Garcia-Godoy; Restor Dent Endod 2024;49(1):e6. Published online January 17, 2024; DOI: https://doi.org/10.5395/rde.2024.49.e6

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Objectives

This study aimed to investigate the elemental analysis and microhardness of a bioactive material (Activa) and marginal tooth structure after storage in different media.

Materials and Methods

Fifteen teeth received cervical restorations with occlusal enamel and gingival dentin margins using the tested material bonded with a universal adhesive, 5 of them on the 4 axial surfaces and the other 10 on only the 2 proximal surfaces. The first 5 teeth were sectioned into 4 restorations each, then stored in 4 different media; deionized water, Dulbecco's phosphate buffered saline (DPBS), Tris buffer, and saliva. The storage period for deionized water was 24 hours while it was 3 months for the other media. Each part was analyzed by scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analysis for different substrates/distances and the wt% of calcium, phosphorus, silica, and fluoride were calculated. The other 10 teeth were sectioned across the restoration, stored in either Tris buffer or saliva for 24 hours or 3 months, and were evaluated for microhardness of different substrates/areas. Data were analyzed using analysis of variance and Tukey’s post hoc test.

Results

Enamel and dentin interfaces in the DPBS group exhibited a significant increase in calcium and phosphorus wt%. Both silica and fluoride significantly increased in tooth structure up to a distance of 75 μm in the 3-month-media groups than the immediate group. Storage media did not affect the microhardness values.

Conclusions

SEM-EDS analysis suggests an ion movement between Activa and tooth structure through a universal adhesive while stored in DPBS.

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Influence of curing mode and aging on the bonding performance of universal adhesives in coronal and root dentin
Hoda Saleh Ismail, Ashraf Ibrahim Ali, Mohamed Elshirbeny Elawsya
BMC Oral Health.2024;[Epub] CrossRef

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Comparison between a bulk-fill resin-based composite and three luting materials on the cementation of fiberglass-reinforced posts: Carlos Alberto Kenji Shimokawa, Paula Mendes Acatauassú Carneiro, Tamile Rocha da Silva Lobo, Roberto Ruggiero Braga, Míriam Lacalle Turbino, Adriana Bona Matos; Restor Dent Endod 2023;48(3):e30. Published online August 8, 2023; DOI: https://doi.org/10.5395/rde.2023.48.e30

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Objectives

This study verified the possibility of cementing fiberglass-reinforced posts using a flowable bulk-fill composite (BF), comparing its push-out bond strength and microhardness with these properties of 3 luting materials.

Materials and Methods

Sixty endodontically treated bovine roots were used. Posts were cemented using conventional dual-cured cement (CC); self-adhesive cement (SA); dual-cured composite (RC); and BF. Push-out bond strength (n = 10) and microhardness (n = 5) tests were performed after 1 week and 4 months of storage. Two-way repeated measures analysis of variance (ANOVA), 1-way ANOVA, t-test, and Tukey post-hoc tests were applied for the push-out bond strength and microhardness results; and Pearson correlation test was applied to verify the correlation between push-out bond strength and microhardness results (α = 0.05).

Results

BF presented higher push-out bond strength than CC and SA in the cervical third before aging (p < 0.01). No differences were found between push-out bond strength before and after aging for all the luting materials (p = 0.84). Regarding hardness, only SA presented higher values measured before than after aging (p < 0.01). RC and BF did not present 80% of the maximum hardness at the apical regions. A strong positive correlation was found between the luting materials' push-out bond strength and microhardness (p < 0.01, R² = 0.7912).

Conclusions

The BF presented comparable or higher push-out bond strength and microhardness than the luting materials, which indicates that it could be used for cementing resin posts in situations where adequate light curing is possible.

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Effects of a relined fiberglass post with conventional and self-adhesive resin cement
Wilton Lima dos Santos Junior, Marina Rodrigues Santi, Rodrigo Barros Esteves Lins, Luís Roberto Marcondes Martins
Restorative Dentistry & Endodontics.2024;[Epub] CrossRef

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Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin: Fernanda Harumi Oku Prochnow, Patricia Valéria Manozzo Kunz, Gisele Maria Correr, Marina da Rosa Kaizer, Carla Castiglia Gonzaga; Restor Dent Endod 2022;47(4):e45. Published online November 3, 2022; DOI: https://doi.org/10.5395/rde.2022.47.e45

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Objectives

This study evaluated the relationship between the battery charge level and irradiance of light-emitting diode (LED) light-curing units (LCUs) and how these variables influence the Vickers hardness number (VHN) of a bulk-fill resin.

Materials and Methods

Four LCUs were evaluated: Radii Plus (SDI), Radii-cal (SDI), Elipar Deep Cure (Filtek Bulk Fill, 3M Oral Care), and Poly Wireless (Kavo Kerr). Irradiance was measured using a radiometer every ten 20-second activations until the battery was discharged. Disks (4 mm thick) of a bulk-fill resin (Filtek Bulk Fill, 3M Oral Care) were prepared, and the VHN was determined on the top and bottom surfaces when light-cured with the LCUs with battery levels at 100%, 50% and 10%. Data were analyzed by 2-way analysis of variance, the Tukey’s test, and Pearson correlations (α = 5%).

Results

Elipar Deep Cure and Poly Wireless showed significant differences between the irradiance when the battery was fully charged versus discharged (10% battery level). Significant differences in irradiance were detected among all LCUs, within each battery condition tested. Hardness ratios below 80% were obtained for Radii-cal (10% battery level) and for Poly Wireless (50% and 10% battery levels). The battery level showed moderate and strong, but non-significant, positive correlations with the VHN and irradiance.

Conclusions

Although the irradiance was different among LCUs, it decreased in half of the devices along with a reduction in battery level. In addition, the composite resin effectiveness of curing, measured by the hardness ratio, was reduced when the LCUs’ battery was discharged.

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Effect of Battery Level During Successive Charging Cycles on the Performance of Certified and Low-cost Uncertified Light-curing Units Available on E-commerce
TS Peres, G Oliveira, SP da Silva Sakamoto, M da Silva Faria, HL Carlo, CJ Soares
Operative Dentistry.2024; 49(6): 673. CrossRef
Influence of Exposure Distance on Light Irradiance of Dental Curing Lamps in Various Operating Modes
Anna Lehmann, Kacper Nijakowski, Marta Mroczyk, Filip Podgórski, Beata Czarnecka, Anna Surdacka
Applied Sciences.2024; 14(21): 9999. CrossRef
ESTADO DA INTENSIDADE LUMINOSA DAS LÂMPADAS DE FOTOPOLIMERIZAÇÃO DAS CLÍNICAS ODONTOLÓGICAS DOS CENTROS DE SAÚDE DA CIDADE DE CUENCA
Milton Alexis Quinchiguano Caraguay, David Ismael Bravo Achundia , Esteban Eduardo Amoroso Calle, Manuel Estuardo Bravo Calderon
RECISATEC - REVISTA CIENTÍFICA SAÚDE E TECNOLOGIA - ISSN 2763-8405.2023; 3(6): e36296. CrossRef

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Effects of 3 different light-curing units on the physico-mechanical properties of bleach-shade resin composites: Azin Farzad, Shahin Kasraei, Sahebeh Haghi, Mahboubeh Masoumbeigi, Hassan Torabzadeh, Narges Panahandeh; Restor Dent Endod 2022;47(1):e9. Published online February 7, 2022; DOI: https://doi.org/10.5395/rde.2022.47.e9

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Objectives

This study investigated the microhardness, flexural strength, and color stability of bleach-shade resin composites cured with 3 different light-curing units.

Materials and Methods

In this in vitro experimental study, 270 samples were fabricated of bleach and A2 shades of 3 commercial resin composites (Point 4, G-aenial Anterior, and Estelite Sigma Quick). Samples (n = 5 for each trial) were cured with Bluephase N, Woodpecker LED.D, and Optilux 501 units and underwent Vickers microhardness and flexural strength tests. The samples were tested after 24 hours of storage in distilled water. Color was assessed using a spectrophotometer immediately after preparation and 24 hours after curing. Data were analyzed using 3-way analysis of variance and the Tukey test (p ≤ 0.001).

Results

Samples cured with Optilux exhibited the highest and those cured with LED.D exhibited the lowest microhardness (p = 0.023). The bleach shade of Point 4 composite cured with Optilux displayed the highest flexural strength, while the same composite and shade cured with Sigma Quick exhibited the lowest (p ≤ 0.001). The color change after 24 hours was greatest for the bleach shade of G-aenial cured with Bluephase N and least for the A2 shade of Sigma Quick cured with Optilux (p ≤ 0.001).

Conclusions

Light curing with polywave light-emitting diode (LED) yielded results between or statistically similar to those of quartz-tungsten-halogen and monowave LED in the microhardness and flexural strength of both A2 and bleach shades of resin composites. However, the brands of light-curing devices showed significant differences in color stability.

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Mechanical Behaviour of Novel Nanohybrid Resin Composite Using Two Light Cure Systems
Ghada H. Naguib, Jumana Mazhar, Abeer Alnowaiser, Abdulghani Mira, Hisham Mously, Rabab Aljawi, Samar H. Abuzinadah, Mohamed T. Hamed
International Dental Journal.2025; 75(2): 1136. CrossRef
Evaluation of the Depth of Cure by Microhardness of Bulk-Fill Composites with Monowave and Polywave LED Light-Curing Units
Socratis Thomaidis, Dimitris Kampouropoulos, Maria Antoniadou, Afrodite Kakaboura
Applied Sciences.2024; 14(24): 11532. CrossRef
Effect of hard segment chemistry and structure on the self‐healing properties of UV‐curable coatings based on the urethane acrylates with built‐in Diels–Alder adduct
Paulina Bednarczyk, Karolina Mozelewska, Małgorzata Nowak, Joanna Klebeko, Joanna Rokicka, Paula Ossowicz‐Rupniewska
Journal of Applied Polymer Science.2023;[Epub] CrossRef
Effects of Dental Bleaching Agents on the Surface Roughness of Dental Restoration Materials
Alexandru Dan Popescu, Mihaela Jana Tuculina, Oana Andreea Diaconu, Lelia Mihaela Gheorghiță, Claudiu Nicolicescu, Cristian Niky Cumpătă, Cristiana Petcu, Jaqueline Abdul-Razzak, Ana Maria Rîcă, Ruxandra Voinea-Georgescu
Medicina.2023; 59(6): 1067. CrossRef
Effect of Polywave and Monowave Light Curing Units on Color Change of Composites Containing Trime-thylbenzoyl-Diphenyl-Phosphine Before and After Aging
Negar Madihi, Maryam Hoorizad ganjkar, Negin Nasoohi, Ali Kaboudanian Ardestani
Journal of Research in Dental and Maxillofacial Sciences.2023; 8(4): 249. CrossRef

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Physicochemical characterization of two bulk fill composites at different depths: Guillermo Grazioli, Carlos Enrique Cuevas-Suárez, Leina Nakanishi, Alejandro Francia, Rafael Ratto de Moraes; Restor Dent Endod 2021;46(3):e39. Published online July 5, 2021; DOI: https://doi.org/10.5395/rde.2021.46.e39

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Objectives

This study analyzed the physical-chemical behavior of 2 bulk fill resin composites (BFCs; Filtek Bulk Fill [FBF], and Tetric-N-Ceram Bulk Fill [TBF]) used in 2- and 4-mm increments and compared them with a conventional resin composite (Filtek Z250).

Materials and Methods

Flexural strength and elastic modulus were evaluated by using a 3-point bending test. Knoop hardness was measured at depth areas 0–1, 1–2, 2–3, and 3–4 mm. The translucency parameter was measured using an optical spectrophotometer. Real-time polymerization kinetics was analyzed using Fourier transform infrared spectroscopy.

Results

Flexural strength was similar among the materials, while TBF showed lower elastic modulus (Z250: 6.6 ± 1.3, FBF: 6.4 ± 0.9, TBF: 4.3 ± 1.3). The hardness of Z250 was similar only between 0–1 mm and 1–2 mm. Both BFCs had similar hardness until 2–3 mm, and showed significant decreases at 3–4 mm (FBF: 33.45 ± 1.95 at 0–1 mm to 23.19 ± 4.32 at 3–4 mm, TBF: 23.17 ± 2.51 at 0–1 mm to 15.11 ± 1.94 at 3–4 mm). The BFCs showed higher translucency than Z250. The polymerization kinetics of all the materials were similar at 2-mm increments. At 4-mm, only TBF had a similar degree of conversion compared with 2 mm.

Conclusions

The BFCs tested had similar performance compared to the conventional composite when used in up to 2-mm increments. When the increment was thicker, the BFCs were properly polymerized only up to 3 mm.

Citations

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Translucency of bulk‐fill composite materials: A systematic review
Gaetano Paolone, Sofia Baldani, Niccolò De Masi, Mauro Mandurino, Giacomo Collivasone, Nicola Scotti, Enrico Gherlone, Giuseppe Cantatore
Journal of Esthetic and Restorative Dentistry.2024; 36(7): 995. CrossRef
Can composite packaging and selective enamel etching affect the clinical behavior of bulk-fill composite resin in posterior restorations? 24-month results of a randomized clinical trial
Marcos de Oliveira BARCELEIRO, Chane TARDEM, Elisa Gomes ALBUQUERQUE, Leticia de Souza LOPES, Stella Soares MARINS, Luiz Augusto POUBEL, Roberta BARCELOS, Romina ÑAUPARI-VILLASANTE, Alessandro Dourado LOGUERCIO, Fernanda Signorelli CALAZANS
Journal of Applied Oral Science.2023;[Epub] CrossRef
No-Cap Flowable Bulk-Fill Composite: Physico-Mechanical Assessment
Abdullah Alshehri, Feras Alhalabi, Ali Robaian, Mohammed A. S. Abuelqomsan, Abdulrahman Alshabib, Eman Ismail, Faisal Alzamil, Nawaf Alotaibi, Hamad Algamaiah
Polymers.2023; 15(8): 1847. CrossRef
The Microhardness and Surface Roughness Assessment of Bulk-Fill Resin Composites Treated with and without the Application of an Oxygen-Inhibited Layer and a Polishing System: An In Vitro Study
Ann Carrillo-Marcos, Giuliany Salazar-Correa, Leonor Castro-Ramirez, Marysela Ladera-Castañeda, Carlos López-Gurreonero, Hernán Cachay-Criado, Ana Aliaga-Mariñas, Alberto Cornejo-Pinto, Luis Cervantes-Ganoza, César Félix Cayo-Rojas
Polymers.2022; 14(15): 3053. CrossRef

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Influence of modeling agents on the surface properties of an esthetic nano-hybrid composite: Zeynep Bilge Kutuk, Ecem Erden, Damla Lara Aksahin, Zeynep Elif Durak, Alp Can Dulda; Restor Dent Endod 2020;45(2):e13. Published online January 29, 2020; DOI: https://doi.org/10.5395/rde.2020.45.e13

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Objective

The aim of this study was to evaluate the influence of different modeling agents on the surface microhardness (Vickers hardness number; VHN), roughness (Ra), and color change (ΔE) of a nano-hybrid composite with or without exposure to discoloration by coffee.

Materials and Methods

Sixty-four cylinder-shaped nano-hybrid composite specimens were prepared using a Teflon mold. The specimens' surfaces were prepared according to the following groups: group 1, no modeling agent; group 2, Modeling Liquid; group 3, a universal adhesive (G-Premio Bond); and group 4, the first step of a 2-step self-adhesive system (OptiBond XTR). Specimens were randomly allocated into 2 groups (n = 8) according to the storage medium (distilled water or coffee). VHN, Ra, and ΔE were measured at 24 hours, 1 week, and 6 weeks. The Kruskal-Wallis test followed by the Bonferroni correction for pairwise comparisons was used for statistical analysis (α = 0.05).

Results

Storage time did not influence the VHN of the nano-hybrid composite in any group (p > 0.05). OptiBond XTR Primer application affected the VHN negatively in all investigated storage medium and time conditions (p < 0.05). Modeling Liquid application yielded improved Ra values for the specimens stored in coffee at each time point (p < 0.05). Modeling Liquid application was associated with the lowest ΔE values in all investigated storage medium and time conditions (p < 0.05).

Conclusion

Different types of modeling agents could affect the surface properties and discoloration of nano-hybrid composites.

Citations

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The Impact of Modeling Liquids on Surface Roughness and Color Properties of Bulkfill Resin Composites After Simulated Tooth Brushing: An in Vitro Study. Part I
Camila Falconí‐Páez, Claudia González‐Vaca, Juliana Guarneri, Newton Fahl, Paulina Aliaga‐Sancho, Maria Lujan Mendez‐Bauer, Cesar Augusto Galvão Arrais, Andrés Dávila‐Sánchez
Journal of Esthetic and Restorative Dentistry.2025; 37(2): 514. CrossRef
Coating Agents for Resin Composites: Effect on Color Stability, Roughness, and Surface Micromorphology Subjected to Brushing Wear
FR Hojo, TC Martins, WF Vieira-Junior, FMG França, CP Turssi, RT Basting
Operative Dentistry.2025; 50(1): 101. CrossRef
Effect of modeling liquid application on color stability and surface roughness of single-shade composites
Melek Güven Bekdaş, Ihsan Hubbezoglu
BMC Oral Health.2025;[Epub] CrossRef
Impact of combining dental composite brushes with modeling resins on the color stability and topographic features of composites
Abdulrahman A Balhaddad, Faisal Alharamlah, Alhanoof Aldossary, Wejdan Almutairi, Turki Alshehri, Mary Anne S Melo, Afnan O Al-Zain, Eman H Ismail
Journal of Applied Biomaterials & Functional Materials.2024;[Epub] CrossRef
Investigation of the Degree of Monomer Conversion in Dental Composites through Various Methods: An In Vitro Study
Musa Kazim Ucuncu, Ozge Celiksoz, Emine Sen, Yasemin Yucel Yucel, Bircan Dinc
Applied Sciences.2024; 14(11): 4406. CrossRef
EFEITO DOS LÍQUIDOS MODELADORES NA SUPERFÍCIE DA RESINA COMPOSTA – UMA REVISÃO DE LITERATURA
Samuel Silva Dias, Matheus Fernando Lopes, Jeffison Teles Dias, Caio Junji Tanaka, Jose Augusto Rodrigues
RECIMA21 - Revista Científica Multidisciplinar - ISSN 2675-6218.2024; 5(2): e524899. CrossRef
Effect of Instrument Lubricant on Mechanical Properties of Restorative Composite
G Pippin, D Tantbirojn, M Wolfgang, JS Nordin, A Versluis
Operative Dentistry.2024; 49(4): 475. CrossRef
Full analysis of the effects of modeler liquids on the properties of direct resin-based composites: a meta-analysis review of in vitro studies
Eduardo Trota Chaves, Lisia Lorea Valente, Eliseu Aldrighi Münchow
Clinical Oral Investigations.2023; 27(7): 3289. CrossRef
Influence of Modeling Liquids and Universal Adhesives Used as Lubricants on Color Stability and Translucency of Resin-Based Composites
Gaetano Paolone, Claudia Mazzitelli, Giacomo Zechini, Salvatore Scolavino, Cecilia Goracci, Nicola Scotti, Giuseppe Cantatore, Enrico Gherlone, Alessandro Vichi
Coatings.2023; 13(1): 143. CrossRef
Influence of Instrument Lubrication on Properties of Dental Composites
Juliusz Kosewski, Przemysław Kosewski, Agnieszka Mielczarek
European Journal of Dentistry.2022; 16(04): 719. CrossRef
Effect of Modelıng Liquid Use on Color and Whiteness Index Change of Composite Resins
Numan AYDIN, Serpil KARAOĞLANOĞLU, Bilge ERSÖZ
Cumhuriyet Dental Journal.2022; 25(Supplement): 119. CrossRef
Effects of Immediate Coating on Unset Composite with Different Bonding Agents to Surface Hardness
Nantawan Krajangta, Supissara Ninbanjong, Sunisa Khosook, Kanjana Chaitontuak, Awiruth Klaisiri
European Journal of Dentistry.2022; 16(04): 828. CrossRef
Modeling Liquids and Resin-Based Dental Composite Materials—A Scoping Review
Gaetano Paolone, Claudia Mazzitelli, Uros Josic, Nicola Scotti, Enrico Gherlone, Giuseppe Cantatore, Lorenzo Breschi
Materials.2022; 15(11): 3759. CrossRef
Shear Bond Strength of Composite Diluted with Composite-Handling Agents on Dentin and Enamel
Mijoo Kim, Deuk-Won Jo, Shahed Al Khalifah, Bo Yu, Marc Hayashi, Reuben H. Kim
Polymers.2022; 14(13): 2665. CrossRef
Effect of Modeling Resins on Microhardness of Resin Composites
Ezgi T. Bayraktar, Pinar Y. Atali, Bora Korkut, Ezgi G. Kesimli, Bilge Tarcin, Cafer Turkmen
European Journal of Dentistry.2021; 15(03): 481. CrossRef

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Effect of dental bleaching on the microhardness and surface roughness of sealed composite resins: Renan Aparecido Fernandes, Henrico Badaoui Strazzi-Sahyon, Thaís Yumi Umeda Suzuki, André Luiz Fraga Briso, Paulo Henrique dos Santos; Restor Dent Endod 2020;45(1):e12. Published online January 10, 2020; DOI: https://doi.org/10.5395/rde.2020.45.e12

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Objectives

The aim of this in vitro study was to evaluate the microhardness and surface roughness of composite resins before and after tooth bleaching procedures.

Materials and Methods

Sixty specimens were prepared of each composite resin (Filtek Supreme XT and Opallis), and BisCover LV surface sealant was applied to half of the specimens. Thirty enamel samples were obtained from the buccal and lingual surfaces of human molars for use as the control group. The surface roughness and microhardness were measured before and after bleaching procedures with 35% hydrogen peroxide or 16% carbamide (n = 10). Data were analyzed using 1-way analysis of variance and the Fisher test (α = 0.05).

Results

Neither hydrogen peroxide nor carbamide peroxide treatment significantly altered the hardness of the composite resins, regardless of surface sealant application; however, both treatments significantly decreased the hardness of the tooth samples (p < 0.05). The bleaching did not cause any change in surface roughness, with the exception of the unsealed Opallis composite resin and dental enamel, both of which displayed an increase in surface roughness after bleaching with carbamide peroxide (p < 0.05).

Conclusions

The microhardness and surface roughness of enamel and Opallis composite resin were influenced by bleaching procedures.

Citations

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Effect of Bleaching on Surface Roughness and Color Parameters of Coffee-Stained Nanohybrid Dental Composites with Different Viscosities
Hetaf S. Redwan, Mohamed A. Hussein, Mohamed M. Abdul-Monem
European Journal of General Dentistry.2025; 14(01): 027. CrossRef
Effect of Staining and External Bleaching on the Color Stability and Surface Roughness of Universal-Shade Resin-Based Composite
AlHanouf AlHabdan, Amal Alsuhaibani, Lama Alomran, Lulwah Almutib
Clinical, Cosmetic and Investigational Dentistry.2025; Volume 17: 1. CrossRef
Comparative Analysis Between Strip and Gels Indicated for at Home Bleaching: Analysis of Color Alteration, Roughness and Microhardness of Dental Enamel
K. M. S. Aidar, L. T. A. Cintra, M. C. B. Ferreira, T. C. Fagundes, L. M. B. Esteves, J. Goto, A. Catelan, A. L. F. Briso
Journal of Esthetic and Restorative Dentistry.2025;[Epub] CrossRef
Surface properties and susceptibility to staining of a resin composite after brushing with different whitening toothpastes
Aline da Silva Barros, Carolina Meneghin Barbosa, Renata Siqueira Scatolin, Waldemir Francisco Vieira Junior, Laura Nobre Ferraz
Restorative Dentistry & Endodontics.2025; 50(1): e6. CrossRef
Comparison of Microhardness and Surface Roughness of New Nanofiber Filled Flowable Composite
Rumeysa Hatice ENGINLER OZLEN, Zumrut Ceren OZDUMAN, Burcu OGLAKCI OZKOC, Evrim ELIGUZELOGLU DALKILIC
Bezmialem Science.2024; 12(4): 406. CrossRef
Effect of Bleaching Agents on Composite Resins with and without Bis-GMA: An In Vitro Study
María Melo, Bianca Dumitrache, James Ghilotti, José Luis Sanz, Carmen Llena
Journal of Functional Biomaterials.2024; 15(6): 144. CrossRef
Changes in physical properties of universal composites andCAD/CAMmaterials after bleaching and antioxidant applications: Scanning electron microscope and atomic force microscope evaluation
Oguz Kaan Tuysuz, Merve Gurses
Microscopy Research and Technique.2024; 87(5): 977. CrossRef
The Effects of Home and Over-The-Counter Whitening Agents on Surface Roughness and Microhardness of High Aesthetic Composites
Elif İpek KILIÇ DÖNMEZ, İhsan HUBBEZOĞLU
Cumhuriyet Dental Journal.2024; 27(1): 30. CrossRef
Effect of carbamide peroxide treatment on the ion release of different dental restorative materials
Merve Nur Yilmaz, Pinar Gul
BMC Oral Health.2024;[Epub] CrossRef
Inorganic Phosphate Effect in a Hydrogen Peroxide-based Bleaching Agent: Physicochemical, Mechanical, and Morphological Properties of Dental Enamel
KG Garcia, GP Nunes, ACB Delbem, PH dos Santos, GLP Fernandes, HF Robles, PBB Lemos, M Danelon
Operative Dentistry.2024; 49(4): 465. CrossRef
Effect of bleaching and repolishing on whiteness change and staining susceptibility of resin-based materials
Sultan Aktuğ Karademir, Samet Atasoy, Beyza Yılmaz
BMC Oral Health.2024;[Epub] CrossRef
Influence of Low pH on the Microhardness and Roughness Surface of Dental Composite—A Preliminary Study
Leszek Szalewski, Dorota Wójcik, Monika Sowa, Vladyslav Vivcharenko, Krzysztof Pałka
Materials.2024; 17(14): 3443. CrossRef
In Vitro Evaluation of the Effectiveness and pH Variation of Dental Bleaching Gels and Their Effect on Enamel Surface Roughness
Federica Veneri, Francesco Cavani, Giovanni Bolelli, Vittorio Checchi, Alessia Bizzi, Giacomo Setti, Luigi Generali
Dentistry Journal.2024; 12(12): 415. CrossRef
Does the combination of whitening toothpaste and hydrogen peroxide bleaching increase the surface roughness and change the morphology of a nanofilled composite?
Cecília Pereira da Silva Braga Tenório, Matheus Kury, Geyse Maria dos Santos Muniz Mota, Cecília Pedroso Turssi, Flávia Lucisano Botelho do Amaral, Vanessa Cavalli
Brazilian Journal of Oral Sciences.2024; 23: e241938. CrossRef
Effect of peroxide‐free and peroxide‐based in‐office bleaching on the surface and mechanical properties of CAD/CAM esthetic restorative materials
Majed M. Alsarani, Aftab Ahmed Khan, Leonel S. J. Bautista, Hanan Alsunbul, Jukka P. Matinlinna
European Journal of Oral Sciences.2024;[Epub] CrossRef
Effect of Repolishing on Color Stability, Translucency, and Surface Roughness of Aged Monochromatic Dental Composites
Mohamed M. Abdul-Monem, Mohamed A. Hussein, Mona G. Abdelrehim
European Journal of General Dentistry.2024; 13(03): 240. CrossRef
Color changes of nanofiller composite resin after glycerin application immersed in turmeric extract
Sukaton, Galih Sampoerno, Widyajeng Ayu Laksmi, Daradhasih Bestari Santiaji
Conservative Dentistry Journal.2023; 13(1): 37. CrossRef
Effects of Dental Bleaching Agents on the Surface Roughness of Dental Restoration Materials
Alexandru Dan Popescu, Mihaela Jana Tuculina, Oana Andreea Diaconu, Lelia Mihaela Gheorghiță, Claudiu Nicolicescu, Cristian Niky Cumpătă, Cristiana Petcu, Jaqueline Abdul-Razzak, Ana Maria Rîcă, Ruxandra Voinea-Georgescu
Medicina.2023; 59(6): 1067. CrossRef
Effect of Bleaching on the Microhardness and Modulus of Elasticity of ACTIVA BioACTIVE – RESTORATIVE: An In Vitro Study
Sushritha Sricharan, Swaroop Hegde, Narmada J., Indiresha H. Narayana, Chatura Mohan, Nithin K. Shetty
Journal of Advanced Oral Research.2023; 14(2): 190. CrossRef
The effect of bleaching on surface roughness and gloss of different CAD/CAM ceramic and hybrid ceramic materials
Ruwaida Z Alshali, Mohammed A AlQahtani, Dalea M Bukhary, Mlak A Alzahrani, Shatha S Alsoraihi, Majed A Alqahtani
Journal of Applied Biomaterials & Functional Materials.2023;[Epub] CrossRef
Effect of bleaching with 15% carbamide peroxide on color stability of microhybrid, nanohybrid, and nanofilled resin composites, each in 3 staining solutions (coffee, cola, red grape juice): A 3-phase study
Azadeh Ghaemi, Sanaz Sharifishoshtari, Mohsen Shahmoradi, Hossein Akbari, Parisa Boostanifard, Sepideh Bagheri, Mohammadreza Shokuhifar, Negin Ashoori, Vahid Rakhshan
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Micro-Hardness and Surface Roughness of Bulk-Fill Composite Resin: Effect of Surface Sealant Application and Two Bleaching Regimens
Reham Mohamad Attia, Eman Mohamed Sobhy, Mona El Said Abd El Hameed Essa
European Journal of General Dentistry.2023; 12(03): 169. CrossRef
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Jennifer Hoppe, Thomas Lehmann, Christoph-Ludwig Hennig, Ulrike Schulze-Späte, Collin Jacobs
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Jorge Zamudio-Santiago, Marysela Ladera-Castañeda, Flor Santander-Rengifo, Carlos López-Gurreonero, Alberto Cornejo-Pinto, Ali Echavarría-Gálvez, Luis Cervantes-Ganoza, César Cayo-Rojas
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Giovanna Gisella Ramírez-Vargas, Julia Elbia Medina y Mendoza, Ana Sixtina Aliaga-Mariñas, Marysela Irene Ladera-Castañeda, Luis Adolfo Cervantes-Ganoza, César Félix Cayo-Rojas
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DP Silva, BA Resende, M Kury, CB André, CPM Tabchoury, M Giannini, V Cavalli
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Geyse Maria dos Santos Muniz Mota, Matheus Kury, Cecília Pereira da Silva Braga Tenório, Flávia Lucisano Botelho do Amaral, Cecília Pedroso Turssi, Vanessa Cavalli
Frontiers in Dental Medicine.2020;[Epub] CrossRef

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The effect of preheating resin composites on surface hardness: a systematic review and meta-analysis: Ali A. Elkaffas, Radwa I. Eltoukhy, Salwa A. Elnegoly, Salah H. Mahmoud; Restor Dent Endod 2019;44(4):e41. Published online October 29, 2019; DOI: https://doi.org/10.5395/rde.2019.44.e41

Abstract PDF PubReader ePub

Objectives

This paper presents a systematic review and meta-analysis of the effect of preheating on the hardness of nanofilled, nanoceramic, nanohybrid, and microhybrid resin composites.

Materials and Methods

An electronic search of papers on MEDLINE/PubMed, ScienceDirect, and EBSCOhost was performed. Only in vitro studies were included. Non-English studies, case reports, clinical trials, and review articles were excluded. A meta-analysis of the reviewed studies was conducted to quantify differences in the microhardness of the Z250 microhybrid resin composite using the Comprehensive Meta-Analysis software.

Results

Only 13 studies met the inclusion criteria for this systematic review. The meta-analysis showed that there were significant differences between the non-preheated and preheated modes for both the top and bottom surfaces of the specimens (p < 0.05). The microhardness of the Z250 resin composite on the top surface in the preheated mode (78.1 ± 2.9) was higher than in the non-preheated mode (67.4 ± 4.0; p < 0.001). Moreover, the microhardness of the Z250 resin composite on the bottom surface in the preheated mode (71.8 ± 3.8) was higher than in the non-preheated mode (57.5 ± 5.7, p < 0.001).

Conclusions

Although the results reported in the reviewed studies showed great variability, sufficient scientific evidence was found to support the hypothesis that preheating can improve the hardness of resin composites.

Citations

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Corina Mirela Prodan, Cristina Gasparik, Javier Ruiz‐López, Diana Dudea
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Effects of pre-heating on physical–mechanical–chemical properties of contemporary resin composites
Thamires Bueno, Nivien Masoud, Anna Akkus, Italo Silva, Karen McPherson, Adilson Yoshio Furuse, Fabio Rizzante
Odontology.2025; 113(1): 135. CrossRef
Clinical performance of different bulk‐fill composite resin systems in classIIcavities: A 2‐year randomized clinical trial
Badria Goda, Kareem Hamdi, Radwa I. Eltoukhy, Ashraf I. Ali, Salah Hasab Mahmoud
Journal of Esthetic and Restorative Dentistry.2024; 36(8): 1122. CrossRef
Comparative evaluation of microleakage in Class II cavities restored with snowplow technique using flowable or preheated packable bulk-fill composite resin as gingival increment by dye extraction method: An in vitro study
M. A. Ranjini, V. Geetha, B. Vedavathi, H. K. Ashok, Akshata J. Airsang, S. Swathi
Journal of Conservative Dentistry and Endodontics.2024; 27(11): 1158. CrossRef
Influence of Light‐Curing Time and Increment Thickness on the Properties of Bulk Fill Composite Resins With Distinct Application Systems
Carlos Rocha Gomes Torres, Taiana Paola Prado, Daniele Mara da Silva Ávila, Cesar Rogério Pucci, Alessandra Bühler Borges, Heng Bo Jiang
International Journal of Dentistry.2024;[Epub] CrossRef
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M. Delgado
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The clinical performance of dental resin composite repeatedly preheated: A randomized controlled clinical trial
Mahmoud Elkady, Safaa Abdelhakim, Mona Riad
Journal of Dentistry.2024; 144: 104940. CrossRef
Preheating effect on microhardness and depth of cure of three bulk-fill composite resins: An in vitro study
Aashna Sunil Sahetia, Divya Rupesh Jain, Padmaja Panditrao Sirsat, Meenal N. Gulve, Swapnil J. Kolhe, Surbhi P. Patel
Endodontology.2024;[Epub] CrossRef
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Ghalia Akyle, Hassan Achour
Cureus.2024;[Epub] CrossRef
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Csaba Dudás, Emánuel Kardos, Melinda Székely, Lea Ádám, Zsuzsanna Bardocz-Veres, Evelyn Szőllősi, Kinga Mária Jánosi, Bernadette Kerekes-Máthé
Dentistry Journal.2024; 12(12): 410. CrossRef
Effect of preheating on the physicochemical properties and bond strength of composite resins utilized as dental cements: An in vitro study
Carolina Carramilo Raposo, Luanna Marinho Sereno Nery, Edilausson Moreno Carvalho, Paulo Vitor Campos Ferreira, Diego Machado Ardenghi, José Bauer, Darlon Martins Lima
The Journal of Prosthetic Dentistry.2023; 129(1): 229.e1. CrossRef
Examining the Impact of Preheating on the Fracture Toughness and Microhardness of Composite Resin: A Systematic Review
Jay Bhopatkar, Anuja Ikhar, Manoj Chandak, Aditya Patel, Paridhi Agrawal
Cureus.2023;[Epub] CrossRef
In Vitro Effect of Mouthrinses on the Microhardness of Three Different Nanohybrid Composite Resins
Jhonn Luis Bernaldo-Faustino, Julissa Amparo Dulanto-Vargas, Kilder Maynor Carranza-Samanez, Carlos A. Munoz-Viveros
International Journal of Dentistry.2023; 2023: 1. CrossRef
Efecto del precalentamiento en la microdureza superficial de seis resinas compuestas
Gloria Cristina Moreno Abello, Kavhas Castro, Paula Alejandra Ovalle Barrera, Paula Bernal, Laura Catalina Lara Hernández
Universitas Odontologica.2023;[Epub] CrossRef
Wear and Color Stability of Preheated Bulk-fill and Conventional Resin Composites
AA Abdulmajeed, AA Suliman, BJ Selivany, A Altitinchi, TA Sulaiman
Operative Dentistry.2022; 47(5): 585. CrossRef
Comparison of Mechanical Properties of a Self-Adhesive Composite Cement and a Heated Composite Material
Anastazja Skapska, Zenon Komorek, Mariusz Cierech, Elzbieta Mierzwinska-Nastalska
Polymers.2022; 14(13): 2686. CrossRef
Effects of ionizing radiation on surface properties of current restorative dental materials
Débora Michelle Gonçalves de Amorim, Aretha Heitor Veríssimo, Anne Kaline Claudino Ribeiro, Rodrigo Othávio de Assunção e Souza, Isauremi Vieira de Assunção, Marilia Regalado Galvão Rabelo Caldas, Boniek Castillo Dutra Borges
Journal of Materials Science: Materials in Medicine.2021;[Epub] CrossRef
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Preheated composite: Innovative approach for aesthetic restoration
Reema N Asani, Vandana J Gade, Kalyani G Umale, Rachana Gawande, Rohit R Amburle, Raksha R Kusumbe, Purva P Kale, Priya R Kosare
Archives of Dental Research.2021; 11(2): 103. CrossRef

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Finishing and polishing effects of multiblade burs on the surface texture of 5 resin composites: microhardness and roughness testing: Elodie Ehrmann, Etienne Medioni, Nathalie Brulat-Bouchard; Restor Dent Endod 2019;44(1):e1. Published online November 26, 2018; DOI: https://doi.org/10.5395/rde.2019.44.e1

Abstract PDF PubReader ePub

Objectives

The aim of this in vitro study was to test the effect of 2 finishing–polishing sequences (QB, combining a 12/15-fluted finishing bur and an EVO-Light polisher; QWB, adding a 30-fluted polishing bur after the 12/15-fluted finishing bur used in the QB sequence) on 5 nanotech-based resin composites (Filtek Z500, Ceram X Mono, Ceram X Duo, Tetric Evoceram, and Tetric Evoceram Bulk Fill) by comparing their final surface roughness and hardness values to those of a Mylar strip control group (MS).

Materials and Methods

Twelve specimens of each nanocomposite were prepared in Teflon moulds. The surface of each resin composite was finished with QB (5 samples), QWB (5 samples), or MS (2 samples), and then evaluated (60 samples). Roughness was analysed with an optical profilometer, microhardness was tested with a Vickers indenter, and the surfaces were examined by optical and scanning electron microscopy. Data were analysed using the Kruskal-Wallis test (p < 0.05) followed by the Dunn test.

Results

For the hardness and roughness of nanocomposite resin, the QWB sequence was significantly more effective than QB (p < 0.05). The Filtek Z500 showed significantly harder surfaces regardless of the finishing–polishing sequence (p < 0.05).

Conclusions

QWB yielded the best values of surface roughness and hardness. The hardness and roughness of the 5 nanocomposites presented less significant differences when QWB was used.

Citations

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Effect of modeling liquid application on color stability and surface roughness of single-shade composites
Melek Güven Bekdaş, Ihsan Hubbezoglu
BMC Oral Health.2025;[Epub] CrossRef
Effect of different finishing and polishing systems on surface properties of universal single shade resin-based composites
Ghada Alharbi, Hend NA Al Nahedh, Loulwa M. Al-Saud, Nourah Shono, Ahmed Maawadh
BMC Oral Health.2024;[Epub] CrossRef
A comparative study of polishing systems on optical properties and surface roughness of additively manufactured and conventional resin based composites
Ayse Tugba Erturk-Avunduk, Sevim Atılan-Yavuz, Hande Filiz, Esra Cengiz-Yanardag
Scientific Reports.2024;[Epub] CrossRef
Effect of Instrument Lubricant on Mechanical Properties of Restorative Composite
G Pippin, D Tantbirojn, M Wolfgang, JS Nordin, A Versluis
Operative Dentistry.2024; 49(4): 475. CrossRef
An In Vitro Study regarding the Wear of Composite Materials Following the Use of Dental Bleaching Protocols
Alexandru Dan Popescu, Mihaela Jana Ţuculină, Lelia Mihaela Gheorghiță, Andrei Osman, Claudiu Nicolicescu, Smaranda Adelina Bugălă, Mihaela Ionescu, Jaqueline Abdul-Razzak, Oana Andreea Diaconu, Bogdan Dimitriu
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Fatih ÖZNURHAN, Aylin ÖZEL
Farabi Tıp Dergisi.2023; 2(4): 17. CrossRef
Enamel surface roughness evaluation after debonding and residual resin removal using four different burs
Rapeti Madhu Vanya, Anil Chirla, Uday Kumar Digumarthi, Tarakesh Karri, Bommareddy Radhika, Sanapala Manojna
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Sankar Vishwanath, Sadasiva Kadandale, Senthil kumar Kumarappan, Anupama Ramachandran, Manu Unnikrishnan, Honap manjiri Nagesh
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Kayo Matheus Rodrigues de Souza, Roberto Victor de Melo Silva, Marlon Ferreira Dias, Paulo Cardoso Lins-Filho, Claudio Heliomar Vicente da Silva, Renata Pedrosa Guimarães
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Veronica P. Lima, Jaqueline B. Machado, Yu Zhang, Bas A.C. Loomans, Rafael R. Moraes
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Meltem Nermin DURSUN, Cansu ATALAY
Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi.2022; : 1. CrossRef
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Kıvanç Dülger
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Tushar Kanti Majumdar, Moumita Khatua, Paromita Mazumdar, Sayantan Mukherjee
International Dental Journal of Student's Research.2022; 10(1): 5. CrossRef
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Marina Gullo Augusto, Guilherme Schmitt de Andrade, Ingrid Fernandes Mathias-Santamaria, Amanda Maria de Oliveira Dal Piva, João Paulo Mendes Tribst
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Tuğba MİSİLLİ, Nihan GONULOL, Özge Gizem CABADAĞ, Lena ALMASIFAR, Derya DİNÇ
Clinical and Experimental Health Sciences.2021; 11(3): 487. CrossRef
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Joseph Sabbagh, Layal El Masri, Jean Claude Fahd, Paul Nahas
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Anna Lehmann, Kacper Nijakowski, Natalia Potempa, Paweł Sieradzki, Mateusz Król, Olaf Czyż, Agnieszka Radziszewska, Anna Surdacka
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Riccardo Monterubbianesi, Vincenzo Tosco, Giulia Orilisi, Simone Grandini, Giovanna Orsini, Angelo Putignano
Microscopy Research and Technique.2021; 84(12): 2922. CrossRef
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L. C. Oliveira, P. H. dos Santos, F. S. S. Ramos, M. D. Moda, A. L. F. Briso, T. C. Fagundes
European Archives of Paediatric Dentistry.2021; 22(2): 247. CrossRef
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Sulthan Ibrahim Raja Khan, Dinesh Rao, Anupama Ramachandran, Bhaskaran Veni Ashok, Jagan Kumar Baskaradoss
Scientific Reports.2021;[Epub] CrossRef
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Ksenia Babina, Maria Polyakova, Inna Sokhova, Vladlena Doroshina, Marianna Arakelyan, Nina Novozhilova
Nanomaterials.2020; 10(7): 1339. CrossRef
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Mateusz Granat, Janusz Cieloszyk, Urszula Kowalska, Jadwiga Buczkowska-Radlińska, Ryta Łagocka, Ali Nokhodchi
BioMed Research International.2020;[Epub] CrossRef

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Light transmittance of CAD/CAM ceramics with different shades and thicknesses and microhardness of the underlying light-cured resin cement: Zahra Jafari, Homayoon Alaghehmand, Yasaman Samani, Mina Mahdian, Soraya Khafri; Restor Dent Endod 2018;43(3):e27. Published online June 4, 2018; DOI: https://doi.org/10.5395/rde.2018.43.e27

Abstract PDF PubReader ePub

Objectives

The aim of this in vitro study was to evaluate the effects of the thickness and shade of 3 types of computer-aided design/computer-aided manufacturing (CAD/CAM) materials.

Materials and Methods

A total of 120 specimens of 2 shades (A1 and A3) and 2 thicknesses (1 and 2 mm) were fabricated using VITA Mark II (VM; VITA Zahnfabrik), IPS e.max CAD (IE; IvoclarVivadent), and VITA Suprinity (VS; VITA Zahnfabrik) (n = 10 per subgroup). The amount of light transmission through the ceramic specimens was measured by a radiometer (Optilux, Kerr). Light-cured resin cement samples (Choice 2, Bisco) were fabricated in a Teflon mold and activated through the various ceramics with different shades and thicknesses using an LED unit (Bluephase, IvoclarVivadent). In the control group, the resin cement sample was directly light-cured without any ceramic. Vickers microhardness indentations were made on the resin surfaces (KoopaPazhoohesh) after 24 hours of dark storage in a 37°C incubator. Data were analyzed using analysis of variance followed by the Tukey post hoc test (α = 0.05).

Results

Ceramic thickness and shade had significant effects on light transmission and the microhardness of all specimens (p < 0.05). The mean values of light transmittance and microhardness of the resin cement in the VM group were significantly higher than those observed in the IE and VS groups. The lowest microhardness was observed in the VS group, due to the lowest level of light transmission (p < 0.05).

Conclusion

Greater thickness and darker shades of the 3 types of CAD/CAM ceramics significantly decreased the microhardness of the underlying resin cement.

Citations

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Investigating the Ability to Mask Dental Discoloration by CAD/CAM Bleach Shade Ceramics in Different Thicknesses
Shervin Reybod, Fariba Ezoji, Ghazaleh Ahmadizenouz, Behnaz Esmaeili
Clinical and Experimental Dental Research.2025;[Epub] CrossRef
Light Polymerization through Glass-ceramics: Influence of Light-polymerizing Unit’s Emitted Power and Restoration Parameters (Shade, Translucency, and Thickness) on Transmitted Radiant Power
Ra’fat I. Farah, Ibrahim A. Alblihed, Alhareth A. Aljuoie, Bandar Alresheedi
Contemporary Clinical Dentistry.2024; 15(1): 35. CrossRef
Effect of computer-aided design/computer-aided manufacturing bleach shade ceramic thickness on its light transmittance and microhardness of light-cured resin cement
Pardis Sheibani, Ghazaleh Ahmadizenous, Behnaz Esmaeili, Ali Bijani
Dental Research Journal.2024;[Epub] CrossRef
Effects of shade and thickness on the translucency parameter of anatomic-contour zirconia, transmitted light intensity, and degree of conversion of the resin cement
Noppamath Supornpun, Molly Oster, Kamolphob Phasuk, Tien-Min G. Chu
The Journal of Prosthetic Dentistry.2023; 129(1): 213. CrossRef
The Effect of Different Surface Treatments on the Color Stabilities of Lithium Disilicate Material
Onur Doğan DAĞ, Göknil ALKAN DEMETOĞLU, Ayşegül KURT
Selcuk Dental Journal.2023; 10(2): 395. CrossRef
Effect of thickness of CAD/CAM materials on light transmission and resin cement polymerization using a blue light‐emitting diode light‐curing unit
Eduardo Fernandes de Castro, Bruna Marin Fronza, Jorge Soto‐Montero, Marcelo Giannini, Carlos Tadeu dos‐Santos‐Dias, Richard Bengt Price
Journal of Esthetic and Restorative Dentistry.2023; 35(2): 368. CrossRef
Effect of Optical Properties of Lithium Disilicate Glass Ceramics and Light-Curing Protocols on the Curing Performance of Resin Cement
Kejing Meng, Lu Wang, Jintao Wang, Zhuoqun Yan, Bin Zhao, Bing Li
Coatings.2022; 12(6): 715. CrossRef
Effect of the thickness of CAD‐CAM materials on the shear bond strength of light‐polymerized resin cement
Yener Okutan, Banucicek Kandemir, Mustafa Borga Donmez, Munir Tolga Yucel
European Journal of Oral Sciences.2022;[Epub] CrossRef
Influence of inhomogeneity of the polymerization light beam on the microhardness of resin cement under a CAD-CAM block
Yu-Ra Go, Kwang-Man Kim, Sung-Ho Park
The Journal of Prosthetic Dentistry.2022; 127(5): 802.e1. CrossRef
Evaluation of microhardness and water sorption/solubility of dual-cure resin cement through monolithic zirconia in different shades
Elham Ansarifard, Zahra Panbehzan, Rashin Giti
The Journal of Indian Prosthodontic Society.2021; 21(1): 50. CrossRef
Comparison between Different Shades of Monolithic Zirconia over Microhardness and Water Solubility and Sorption of Dual-cure Resin Cement
Sarika Sharma, Soni Kumari, Nikita Raman, Ashish K Srivastava, Gunja LNU, Arunendra S Chauhan
The Journal of Contemporary Dental Practice.2021; 22(9): 1019. CrossRef
Effect of light intensity, light-curing unit exposure time, and porcelain thickness of ips e.max press and vintage LD press on the hardness of resin cement
Silvia Naliani, Suzan Elias, Rosalina Tjandrawinata
Scientific Dental Journal.2020; 4(1): 21. CrossRef

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The effect of thermocycling on the degree of conversion and mechanical properties of a microhybrid dental resin composite: Mehrsima Ghavami-Lahiji, Melika Firouzmanesh, Hossein Bagheri, Tahereh S. Jafarzadeh Kashi, Fateme Razazpour, Marjan Behroozibakhsh; Restor Dent Endod 2018;43(2):e26. Published online April 26, 2018; DOI: https://doi.org/10.5395/rde.2018.43.e26

Abstract PDF PubReader ePub

Objective

The purpose of this study was to investigate the degree of conversion (DC) and mechanical properties of a microhybrid Filtek Z250 (3M ESPE) resin composite after aging.

Method

The specimens were fabricated using circular molds to investigate Vickers microhardness (Vickers hardness number [VHN]) and DC, and were prepared according to ISO 4049 for flexural strength testing. The initial DC (%) of discs was recorded using attenuated total reflectance-Fourier transforming infrared spectroscopy. The initial VHN of the specimens was measured using a microhardness tester under a load of 300 g for 15 seconds and the flexural strength test was carried out with a universal testing machine (crosshead speed, 0.5 mm/min). The specimens were then subjected to thermocycling in 5°C and 55°C water baths. Properties were assessed after 1,000–10,000 cycles of thermocycling. The surfaces were evaluated using scanning electron microscopy (SEM). Data were analyzed using 1-way analysis of variance followed by the Tukey honest significant difference post hoc test.

Results

Statistical analysis showed that DC tended to increase up to 4,000 cycles, with no significant changes. VHN and flexural strength values significantly decreased upon thermal cycling when compared to baseline (p < 0.05). However, there was no significant difference between initial and post-thermocycling VHN results at 1,000 cycles. SEM images after aging showed deteriorative changes in the resin composite surfaces.

Conclusions

The Z250 microhybrid resin composite showed reduced surface microhardness and flexural strength and increased DC after thermocycling.

Citations

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Girija S Sajjan, Naveena Ponnada, Praveen Dalavai, Madhu Varma Kanumuri, Venkata Karteek Varma Penmatsa, B V Sindhuja
World Journal of Dentistry.2025; 15(9): 749. CrossRef
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Anna Caroliny Detogni, Vitaliano Gomes de Araújo Neto, Caio Felipe de Almeida Nobre, Victor Pinheiro Feitosa, Mário Alexandre Coelho Sinhoreti
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Roopa R Nadig, Veena Pai, Arpita Deb
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Analysis of the shelf life of chitosan stored in different types of packaging, using colorimetry and dentin microhardness: Antonio Miranda da Cruz-Filho, Angelo Rafael de Vito Bordin, Luis Eduardo Souza-Flamini, Débora Fernandes da Costa Guedes, Paulo César Saquy, Ricardo Gariba Silva, Jesus Djalma Pécora; Restor Dent Endod 2017;42(2):87-94. Published online March 27, 2017; DOI: https://doi.org/10.5395/rde.2017.42.2.87

Abstract PDF PubReader ePub

Objectives

Chitosan has been widely investigated and used. However, the literature does not refer to the shelf life of this solution. This study evaluated, through the colorimetric titration technique and an analysis of dentin micro-hardness, the shelf life of 0.2% chitosan solution.

Materials and Methods

Thirty human canines were sectioned, and specimens were obtained from the second and third slices, from cemento-enamel junction to the apex. A 0.2% chitosan solution was prepared and distributed in 3 identical glass bottles (v1, v2, and v3) and 3 plastic bottles (p1, p2, and p3). At 0, 7, 15, 30, 45, 60, 90, 120, 150, and 180 days, the specimens were immersed in each solution for 5 minutes (n = 3 each). The chelating effect of the solution was assessed by micro-hardness and colorimetric analysis of the dentin specimens. 17% EDTA and distilled water were used as controls. Data were analyzed statistically by two-way and Tukey-Kramer multiple comparison (α = 0.05).

Results

There was no statistically significant difference among the solutions with respect to the study time (p = 0.113) and micro-hardness/time interaction (p = 0.329). Chitosan solutions and EDTA reduced the micro-hardness in a similar manner and differed significantly from the control group (p < 0.001). Chitosan solutions chelated calcium ions throughout the entire experiment.

Conclusions

Regardless of the storage form, chitosan demonstrates a chelating property for a minimum period of 6 months.

Citations

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Chitosan’s Ability to Remove the Smear Layer—A Systematic Review of Ex Vivo Studies
Ana Ferreira-Reguera, Inês Ferreira, Irene Pina-Vaz, Benjamín Martín-Biedma, José Martín-Cruces
Medicina.2025; 61(1): 114. CrossRef
Antimicrobial evaluation of root canal irrigants of natural sources with and without gamma radiation activation - An in vitro study
Hoda Raafat Yousri, Abeer Hashem Mahran, Ahmed Abdel Rahman Hashem, Amal A. El-Batouti
Endodontology.2024; 36(4): 383. CrossRef
Influence of Chitosan 0.2% in Various Final Cleaning Methods on the Bond Strength of Fiberglass Post to Intrarradicular Dentin
Naira Geovana Camilo, Alex da Rocha Gonçalves, Larissa Pinzan Flauzino, Cristiane Martins Rodrigues Bernardes, Andreza Maria Fábio Aranha, Priscilla Cardoso Lazari-Carvalho, Marco Aurélio de Carvalho, Helder Fernandes de Oliveira
Polymers.2023; 15(22): 4409. CrossRef
Evaluation and comparison of anti-inflammatory properties of ibuprofen using two drug delivery systems after third molar surgery: using chitosan microspheres as a carrier for local drug delivery in to the third molar socket and through the oral route
Karthik KP, Balamurugan R
British Journal of Oral and Maxillofacial Surgery.2021; 59(2): 191. CrossRef
Optimization of chitosan nanoparticle synthesis and its potential application as germination elicitor of Oryza sativa L.
K. Divya, Smitha Vijayan, Sreekumar Janardanan Nair, M.S. Jisha
International Journal of Biological Macromolecules.2019; 124: 1053. CrossRef
Crosstalk between chitosan and cell signaling pathways
Behrouz Farhadihosseinabadi, Amir Zarebkohan, Mohamad Eftekhary, Mohammad Heiat, Mehrdad Moosazadeh Moghaddam, Mazaher Gholipourmalekabadi
Cellular and Molecular Life Sciences.2019; 76(14): 2697. CrossRef

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Carbohydrate-electrolyte drinks exhibit risks for human enamel surface loss: Mary Anne Sampaio de Melo, Vanara Florêncio Passos, Juliana Paiva Marques Lima, Sérgio Lima Santiago, Lidiany Karla Azevedo Rodrigues; Restor Dent Endod 2016;41(4):246-254. Published online August 16, 2016; DOI: https://doi.org/10.5395/rde.2016.41.4.246

Abstract PDF PubReader ePub

Objectives

The aim of this investigation was to give insights into the impact of carbohydrate-electrolyte drinks on the likely capacity of enamel surface dissolution and the influence of human saliva exposure as a biological protective factor.

Materials and Methods

The pH, titratable acidity (TA) to pH 7.0, and buffer capacity (β) of common beverages ingested by patients under physical activity were analyzed. Then, we randomly distributed 50 specimens of human enamel into 5 groups. Processed and natural coconut water served as controls for testing three carbohydrate-electrolyte drinks. In all specimens, we measured surface microhardness (Knoop hardness numbers) and enamel loss (profilometry, µm) for baseline and after simulated intake cycling exposure model. We also prepared areas of specimens to be exposed to human saliva overnight prior to the simulated intake cycling exposure. The cycles were performed by alternated immersions in beverages and artificial saliva. ANOVA two-way and Tukey HDS tests were used.

Results

The range of pH, TA, and β were 2.85 - 4.81, 8.33 - 46.66 mM/L and 3.48 - 10.25 mM/L × pH, respectively. The highest capacity of enamel surface dissolution was found for commercially available sports drinks for all variables. Single time human saliva exposure failed to significantly promote protective effect for the acidic attack of beverages.

Conclusions

In this study, carbohydrate-electrolyte drinks usually consumed during endurance training may have a greater capacity of dissolution of enamel surface depending on their physicochemical proprieties associated with pH and titratable acidity.

Citations

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Evaluation of developmentally hypomineralised enamel after surface pretreatment with Papacarie Duo gel and different etching modes: an in vitro SEM and AFM study
Y.-L. Lee, K. C. Li, C. K. Y. Yiu, D. H. Boyd, M. Ekambaram
European Archives of Paediatric Dentistry.2022; 23(1): 117. CrossRef
Is the consumption of beverages and food associated to dental erosion? A cross-sectional study in Portuguese athletes
M.-R.G. Silva, M.-A. Chetti, H. Neves, M.-C. Manso
Science & Sports.2021; 36(6): 477.e1. CrossRef
Assessment of surface roughness changes on orthodontic acrylic resin by all-in-one spray disinfectant solutions
Kuei-ling Hsu, Abdulrahman A. Balhaddad, Isadora Martini Garcia, Fabricio Mezzomo Collares, Louis DePaola, Mary Anne Melo
Journal of Dental Research, Dental Clinics, Dental Prospects.2020; 14(2): 77. CrossRef
Nitrate-rich beetroot juice offsets salivary acidity following carbohydrate ingestion before and after endurance exercise in healthy male runners
Mia C. Burleigh, Nicholas Sculthorpe, Fiona L. Henriquez, Chris Easton, Yi-Hung Liao
PLOS ONE.2020; 15(12): e0243755. CrossRef
Dental erosion’ prevalence and its relation to isotonic drinks in athletes: a systematic review and meta-analysis
Pedro Henrique Pereira de Queiroz Gonçalves, Ludmila Silva Guimarães, Fellipe Navarro Azevedo de Azeredo, Letícia Maira Wambier, Lívia Azeredo A. Antunes, Leonardo Santos Antunes
Sport Sciences for Health.2020; 16(2): 207. CrossRef
Atomic force microscopy analysis of enamel nanotopography after interproximal reduction
Shadi Mohebi, Nazila Ameli
American Journal of Orthodontics and Dentofacial Orthopedics.2017; 152(3): 295. CrossRef

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Effect of three nanobiomaterials on microhardness of bleached enamel: Maryam Khoroushi, Farinaz Shirban, Sara Kaveh, Samaneh Doustfateme; Restor Dent Endod 2016;41(3):196-201. Published online July 14, 2016; DOI: https://doi.org/10.5395/rde.2016.41.3.196

Abstract PDF PubReader ePub

Objectives

The aim of this in vitro study was to evaluate the effect of incorporating three different nanobiomaterials into bleaching material on microhardness of bleached enamel.

Materials and Methods

The crowns of 24 extracted sound human molars were sectioned. Sixty enamel specimens (2 × 3 × 4 mm) were selected and divided into five groups (n = 12): Group 1 received no bleaching procedure (control); Group 2 underwent bleaching with a 40% hydrogen peroxide (HP) gel; Groups 3, 4, and 5 were bleached with a 40% HP gel modified by incorporation of bioactive glass (BAG), amorphous calcium phosphate (ACP) and hydroxyapatite (HA), respectively. The enamel microhardness was evaluated. The differences in Knoop microhardness data of each group were analyzed by one-way ANOVA, followed by post hoc Tukey tests.

Results

Significant differences were observed between the study groups. The enamel microhardness changes in Groups 1, 3, 4, and 5 were significantly lower than that of Group 2 (p < 0.001).

Conclusions

Within the limitations of this study, it can be concluded that incorporation of each one of the three tested biomaterials as remineralizing agents might be effective in decreasing enamel microhardness changes subsequent to in-office bleaching.

Citations

Citations to this article as recorded by

Effect of strontium fluorophosphate bioactive glass on color, microhardness and surface roughness of bleached enamel
Shiza Yezdani, Monisha Khatri, Sampath Vidhya, Sekar Mahalaxmi
Technology and Health Care.2024; 32(1): 285. CrossRef
In vitro evaluation of the effect of addition of biomaterials to carbamide peroxide on the bleaching efficacy and microhardness of enamel
Sowmya Kavoor, M. A. Ranjini, Naval Abdul Aziz, H. K. Ashok, Roopa R. Nadig
Journal of Conservative Dentistry and Endodontics.2024; 27(3): 310. CrossRef
Effect of hydrogen peroxide and its combination with nano-hydroxyapatite or nano-bioactive glass on the enamel demineralization and tooth color: An in vitro study
Elham Kheradmand, Alirea Daneshkazemi, Abdolrahim Davari, Maede Kave, Solmaz Ghanbarnejad
Dental Research Journal.2023;[Epub] CrossRef
Over‐the‐counter bleaching agents can help with tooth whitening maintenance
Olívia Santana Jorge, Carolina Noronha Ferraz de Arruda, Rafaella Tonani Torrieri, Rocio Geng Vivanco, Fernanda de Carvalho Panzeri Pires‐de‐Souza
Journal of Esthetic and Restorative Dentistry.2022; 34(2): 328. CrossRef
Effect of Indigenously Developed Nano-Hydroxyapatite Crystals from Chicken Egg Shell on the Surface Hardness of Bleached Human Enamel
Divya Kunam, Vidhya Sampath, Sujatha Manimaran, Mahalaxmi Sekar
Contemporary Clinical Dentistry.2019; 10(3): 489. CrossRef
Influence of Time Intervals between Bleaching Procedures on Enamel Microhardness and Surface Roughness
Roberta Pimentel de Oliveira, Juliana Costa Pereira Baia, Mara Eliane Soares Ribeiro, Mario Honorato da Silva e Souza Junior, Sandro Cordeiro Loretto
The Open Dentistry Journal.2018; 12(1): 555. CrossRef

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The effect of different fluoride application methods on the remineralization of initial carious lesions: Seon Mi Byeon, Min Ho Lee, Tae Sung Bae; Restor Dent Endod 2016;41(2):121-129. Published online May 10, 2016; DOI: https://doi.org/10.5395/rde.2016.41.2.121

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Objectives

The purpose of this study was to assess the effect of single and combined applications of fluoride on the amount of fluoride release, and the remineralization and physical properties of enamel.

Materials and Methods

Each of four fluoride varnish and gel products (Fluor Protector, FP, Ivoclar Vivadent; Tooth Mousse Plus, TM, GC; 60 Second Gel, A, Germiphene; CavityShield, CS, 3M ESPE) and two fluoride solutions (2% sodium fluoride, N; 8% tin(ii) fluoride, S) were applied on bovine teeth using single and combined methods (10 per group), and then the amount of fluoride release was measured for 4 wk. The electron probe microanalysis and the Vickers microhardness measurements were conducted to assess the effect of fluoride application on the surface properties of bovine teeth.

Results

The amount of fluoride release was higher in combined applications than in single application (p < 0.05). Microhardness values were higher after combined applications of N with FP, TM, and CS than single application of them, and these values were also higher after combined applications of S than single application of A (p < 0.05). Ca and P values were higher in combined applications of N with TM and CS than single application of them (p < 0.05). They were also increased after combined applications of the S with A than after single application (p < 0.05).

Conclusions

Combined applications of fluoride could be used as a basis to design more effective methods of fluoride application to provide enhanced remineralization.

Citations

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Maha A. Alsharqawy, Wedad M Etman, Mirvat M Salama, Reda G. Saleh
Tanta Dental Journal.2023; 20(3): 203. CrossRef
Evaluation of Remineralization Potential of Natural Substances on Artificially Induced Carious Lesions in Primary Teeth: An In Vitro Study
Kavitha Ramar, Pooja V Ravi, Rajakumar Sekar
International Journal of Clinical Pediatric Dentistry.2023; 16(2): 244. CrossRef
Upaya Preventif Kesehatan Gigi dan Mulut dengan Aplikasi Fluor pada Gigi Siswa SMPN 77 Jakarta
Agus Ardinansyah, Mochammad Atmaji Windrianto, Nur Hidayati Nosi Prastiyani
Info Abdi Cendekia.2023; 6(2): 74. CrossRef
Evaluation of the antibacterial activity of Enamelast® and Fluor defender® fluoride varnishes against Streptococcus mutans biofilm: an in vitro study in primary teeth
M. A. Matar, S. S. Darwish, R. S. Salma, W. A. Lotfy
European Archives of Paediatric Dentistry.2023; 24(5): 549. CrossRef
In-vitro evaluation of the anti-cariogenic effect of a hybrid coating associated with encapsulated sodium fluoride and stannous chloride in nanoclays on enamel
Sávio José Cardoso BEZERRA, Ítallo Emídio Lira VIANA, Idalina Vieira AOKI, Simone DUARTE, Anderson Takeo HARA, Taís SCARAMUCCI
Journal of Applied Oral Science.2022;[Epub] CrossRef
Comparative Evaluation of Salivary Fluoride Concentration after Topical Application of Silver Diamine Fluoride and Sodium Fluoride: A Randomized Controlled Trial
Nidhi Agarwal, V Vishnu Priya, Zohra Jabin, Iffat Nasim
International Journal of Clinical Pediatric Dentistry.2022; 15(3): 371. CrossRef
Release and Recharge of Fluoride Ions from Acrylic Resin Modified with Bioactive Glass
Zbigniew Raszewski, Danuta Nowakowska, Wlodzimierz Wieckiewicz, Agnieszka Nowakowska-Toporowska
Polymers.2021; 13(7): 1054. CrossRef
Fluoride Concentration in Saliva following Professional Topical Application of 2% Sodium Fluoride Solution
Manjit Talwar, Amrit Tewari, H. S. Chawla, Vinod Sachdev, Suresh Sharma
Contemporary Clinical Dentistry.2019; 10(3): 423. CrossRef
Clinical and laboratory evaluation of the Elgydium Protection caries toothpaste effectiveness in patients with high intensity of dental caries
O. A. Zorina, N. B. Petruhina, A. Z. M, O. A. Boriskina, A. A. Tupicin, V. A. Prohodnaja
Stomatologiya.2019; 98(3): 21. CrossRef
Bleaching of simulated stained-remineralized caries lesions in vitro
Sarah S. Al-Angari, Frank Lippert, Jeffrey A. Platt, George J. Eckert, Carlos González-Cabezas, Yiming Li, Anderson T. Hara
Clinical Oral Investigations.2019; 23(4): 1785. CrossRef
Short-Time Antibacterial Effects of Dimethylaminododecyl Methacrylate on Oral Multispecies Biofilm In Vitro
Yujie Zhou, Suping Wang, Xuedong Zhou, Yiran Zou, Mingyun Li, Xian Peng, Biao Ren, Hockin H. K. Xu, Michael D. Weir, Lei Cheng, Yu Chen, Qi Han
BioMed Research International.2019; 2019: 1. CrossRef
Comparison of the Application of Different Fluoride Supplements on Enamel Demineralization Adjacent to Orthodontic Brackets: An In Vitro Study
Arman Mohammadi Shayan, Monireh Rassouli, Soodabeh Kimyai, Hadi Valizadeh, Mohammad Hossein Ahangar Atashi, Sahand Rikhtegaran
Iranian Journal of Orthodontics.2019;[Epub] CrossRef
Effects of nicomethanol hydrofluoride on dental enamel and synthetic apatites: a role for anti-caries protection
N. Sharkov
European Archives of Paediatric Dentistry.2017; 18(6): 411. CrossRef
Intérêt prophylactique et thérapeutique des chewing-gums sans sucre en orthodontie. Une étude menée auprès de professionnels de santé et de patients
Pauline Ferney, François Clauss, Damien Offner, Delphine Wagner
L'Orthodontie Française.2017; 88(3): 275. CrossRef
Silver Diamine Fluoride Has Efficacy in Controlling Caries Progression in Primary Teeth: A Systematic Review and Meta-Analysis
Ana Cláudia Chibinski, Letícia Maíra Wambier, Juliana Feltrin, Alessandro Dourado Loguercio, Denise Stadler Wambier, Alessandra Reis
Caries Research.2017; 51(5): 527. CrossRef
Dental Caries Management of a Patient with a High Caries Risk Based on the Caries Risk Assessment: a Case Peport
Dong-Hyun Lee, Sung-Ok Hong, Seok-Ryun Lee
Korean Journal of Dental Materials.2016; 43(3): 231. CrossRef

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Effect of acidic solutions on the microhardness of dentin and set OrthoMTA and their cytotoxicity on murine macrophage: Soram Oh, Hiran Perinpanayagam, Yoon Lee, Jae-Won Kum, Yeon-Jee Yoo, Sang-Min Lim, Seok Woo Chang, Won-Jun Shon, Woocheol Lee, Seung-Ho Baek, Kee-Yeon Kum; Restor Dent Endod 2016;41(1):12-21. Published online December 1, 2015; DOI: https://doi.org/10.5395/rde.2016.41.1.12

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Objectives

To evaluate the effects of three acids on the microhardness of set mineral trioxide aggregate (MTA) and root dentin, and cytotoxicity on murine macrophage.

Materials and Methods

OrthoMTA (BioMTA) was mixed and packed into the human root dentin blocks of 1.5 mm diameter and 5 mm height. Four groups, each of ten roots, were exposed to 10% citric acid (CA), 5% glycolic acid (GA), 17% ethylenediaminetetraacetic acid (EDTA), and saline for five minutes after setting of the OrthoMTA. Vickers surface microhardness of set MTA and dentin was measured before and after exposure to solutions, and compared between groups using one-way ANOVA with Tukey test. The microhardness value of each group was analyzed using student t test. Acid-treated OrthoMTA and dentin was examined by scanning electron microscope (SEM). Cell viability of tested solutions was assessed using WST-8 assay and murine macrophage.

Results

Three test solutions reduced microhardness of dentin. 17% EDTA demonstrated severe dentinal erosion, significantly reduced the dentinal microhardness compared to 10% CA (p = 0.034) or 5% GA (p = 0.006). 10% CA or 5% GA significantly reduced the surface microhardness of set MTA compared to 17% EDTA and saline (p < 0.001). Acid-treated OrthoMTA demonstrated microporous structure with destruction of globular crystal. EDTA exhibited significantly more cellular toxicity than the other acidic solutions at diluted concentrations (0.2, 0.5, 1.0%).

Conclusions

Tested acidic solutions reduced microhardness of root dentin. Five minute's application of 10% CA and 5% GA significantly reduced the microhardness of set OrthoMTA with lower cellular cytotoxicity compared to 17% EDTA.

Citations

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Impact of calcium hydroxide and 2-hydroxyisocaproic acid on the microhardness of root dentine: an in vitro study
Nandini T. Niranjan, Protim Ghosh Dastidar, Raghavendra Penukonda, Galvin Sim Siang Lin, Roopa Babannavar, Arun Jaysheel, Harshada Pattar
Odontology.2024; 112(3): 711. CrossRef
Evaluation of the Effect of Chitosan-Based Irrigation Solutions on the Bond Strength of Mineral Trioxide Aggregate to Bulk-Fill Composite
Arzu Şahin Mantı, Bağdagül Helvacıoğlu Kıvanç
Journal of Functional Biomaterials.2024; 15(12): 370. CrossRef
Effect of Various Acid Solutions as an Aid in Removing the OrthoMTA-Based Root Canal Filling
Naveen Chhabra, Abhishek Parolia
Materials.2023; 16(13): 4535. CrossRef
Effect of Glycolic Acid, Maleic Acid, and EDTA in the Removal of Smear Layer from Root Canal Dentin
Tarini Mullick, Nidambur Vasudev Ballal
Pesquisa Brasileira em Odontopediatria e Clínica Integrada.2023;[Epub] CrossRef
A comparative evaluation of the effect of various chelating agents on the microhardness of root canal dentin: An in vitro study
Mineet Kaul, Zinnie Nanda, Kranthikumar Reddy, Rahul Deore, Divya Mandlecha, Esha Jaiswal
Endodontology.2023; 35(3): 234. CrossRef
Calcium hydroxide and niobium pentoxide treatment effects before MTA placement
Kolli Sankeerthana, Kittappa Karthikeyan, Sekar Mahalaxmi
Australian Endodontic Journal.2023; 49(1): 48. CrossRef
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Carolyn Primus, James L. Gutmann, Franklin R. Tay, Anna B. Fuks
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Influence of Acidic Environmental Conditions on Push-Out Bonding Strength of Four Calcium Silicate-Based Materials to Root Dentin
Beliz Özel, Raif Erişen, Boonlert Kukiattrakoon
International Journal of Dentistry.2022; 2022: 1. CrossRef
The effects of sodium hypochlorite and ethylenediaminetetraacetic acid on the microhardness of Mineral Trioxide Aggregate and TotalFill Bioceramic Putty
Jacklyn H.R. Chu, Kalie Y. Chia, Alexander L. Qui, Alex Moule, William N. Ha
Australian Endodontic Journal.2020; 46(1): 33. CrossRef
Pre-application of dentin bonding agent prevents discoloration caused by mineral trioxide aggregate
Yoo-Lim Choi, Young-Eun Jang, Bom Sahn Kim, Jin-Woo Kim, Yemi Kim
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Glycolic acid as the final irrigant in endodontics: Mechanical and cytotoxic effects
Yuri Dal Bello, Hisadora Fracaro Porsch, Ana Paula Farina, Matheus Albino Souza, Emmanuel João Nogueira Leal Silva, Ana Karina Bedran-Russo, Doglas Cecchin
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Carbohydrate-electrolyte drinks exhibit risks for human enamel surface loss
Mary Anne Sampaio de Melo, Vanara Florêncio Passos, Juliana Paiva Marques Lima, Sérgio Lima Santiago, Lidiany Karla Azevedo Rodrigues
Restorative Dentistry & Endodontics.2016; 41(4): 246. CrossRef

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Effect of organic acids in dental biofilm on microhardness of a silorane-based composite: Sedighe Sadat Hashemikamangar, Seyed Jalal Pourhashemi, Mohammad Talebi, Nazanin Kiomarsi, Mohammad Javad Kharazifard; Restor Dent Endod 2015;40(3):188-194. Published online June 2, 2015; DOI: https://doi.org/10.5395/rde.2015.40.3.188

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Objectives

This study evaluated the effect of lactic acid and acetic acid on the microhardness of a silorane-based composite compared to two methacrylate-based composite resins.

Materials and Methods

Thirty disc-shaped specimens each were fabricated of Filtek P90, Filtek Z250 and Filtek Z350XT. After measuring of Vickers microhardness, they were randomly divided into 3 subgroups (n = 10) and immersed in lactic acid, acetic acid or distilled water. Microhardness was measured after 48 hr and 7 day of immersion. Data were analyzed using repeated measures ANOVA (p < 0.05). The surfaces of two additional specimens were evaluated using a scanning electron microscope (SEM) before and after immersion.

Results

All groups showed a reduction in microhardness after 7 day of immersion (p < 0.001). At baseline and 7 day, the microhardness of Z250 was the greatest, followed by Z350 and P90 (p < 0.001). At 48 hr, the microhardness values of Z250 and Z350 were greater than P90 (p < 0.001 for both), but those of Z250 and Z350 were not significantly different (p = 0.095). Also, the effect of storage media on microhardness was not significant at baseline, but significant at 48 hr and after 7 day (p = 0.001 and p < 0.001, respectively). Lactic acid had the greatest effect.

Conclusions

The microhardness of composites decreased after 7 day of immersion. The microhardness of P90 was lower than that of other composites. Lactic acid caused a greater reduction in microhardness compared to other solutions.

Citations

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Renata Siqueira Scatolin, Caio Castro Grigoletto, Laura Nobre Ferraz, Rafael Pino Vitti
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Sara Akbari Fard, Saeed Nemati Anaraki, Haleh Kazemi -Yazdi, Mahsa Qenaat
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Rusal S Ahmed, Alan I Saleem
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Marco Colombo, Simone Gallo, Claudio Poggio, Vittorio Ricaldone, Carla Renata Arciola, Andrea Scribante
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A. C. Branco, J. Brito, M. Codorniz, M. Steinhausen, F. Martins, J. Reis, P. Maurício, R. Colaço, A. P. Serro
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Serdar Akarsu, Hüseyin Özgür Özdemir
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Survival and Associated Risk Factors of Selective Caries Removal Treatments in Primary Teeth: A Retrospective Study in a High Caries Risk Population
Ximena C. Melgar, Niek J.M. Opdam, Marcos Britto Correa, Renata Franzon, Flávio Fernando Demarco, Fernando B. Araujo, Luciano Casagrande
Caries Research.2017; 51(5): 466. CrossRef

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Effect of resin thickness on the microhardness and optical properties of bulk-fill resin composites: Eun-Ha Kim, Kyoung-Hwa Jung, Sung-Ae Son, Bock Hur, Yong-Hoon Kwon, Jeong-Kil Park; Restor Dent Endod 2015;40(2):128-135. Published online January 13, 2015; DOI: https://doi.org/10.5395/rde.2015.40.2.128

Abstract PDF PubReader ePub

Objectives

This study evaluated the effects of the resin thickness on the microhardness and optical properties of bulk-fill resin composites.

Methods

Four bulk-fill (Venus Bulk Fill, Heraeus Kulzer; SDR, Dentsply Caulk; Tetric N-Ceram Bulk Fill, Ivoclar vivadent; SonicFill, Kerr) and two regular resin composites (Charisma flow, Heraeus Kulzer; Tetric N-Ceram, Ivoclar vivadent) were used. Sixty acrylic cylindrical molds were prepared for each thickness (2, 3 and 4 mm). The molds were divided into six groups for resin composites. The microhardness was measured on the top and bottom surfaces, and the colors were measured using Commission Internationale d'Eclairage (CIE) L^*a^*b^* system. Color differences according to the thickness and translucency parameters and the correlations between the microhardness and translucency parameter were analyzed. The microhardness and color differences were analyzed by ANOVA and Scheffe's post hoc test, and a student t-test, respectively. The level of significance was set to α = 0.05.

Results

The microhardness decreased with increasing resin thickness. The bulk-fill resin composites showed a bottom/top hardness ratio of almost 80% or more in 4 mm thick specimens. The highest translucency parameter was observed in Venus Bulk Fill. All resin composites used in this study except for Venus Bulk Fill showed linear correlations between the microhardness and translucency parameter according to the thickness.

Conclusions

Within the limitations of this study, the bulk-fill resin composites used in this study can be placed and cured properly in the 4 mm bulk.

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Effect of intracanal medicaments used in endodontic regeneration procedures on microhardness and chemical structure of dentin: Ghaeth Hamdon Yassen, George Joseph Eckert, Jeffrey Allen Platt; Restor Dent Endod 2015;40(2):104-112. Published online December 24, 2014; DOI: https://doi.org/10.5395/rde.2015.40.2.104

Abstract PDF PubReader ePub

Objectives

This study was performed to investigate the effects of different intracanal medicaments on chemical structure and microhardness of dentin.

Materials and Methods

Fifty human dentin discs were obtained from intact third molars and randomly assigned into two control groups and three treatment groups. The first control group received no treatment. The second control group (no medicament group) was irrigated with sodium hypochlorite (NaOCl), stored in humid environment for four weeks and then irrigated with ethylenediaminetetraacetic acid (EDTA). The three treatment groups were irrigated with NaOCl, treated for four weeks with either 1 g/mL triple antibiotic paste (TAP), 1 mg/mL methylcellulose-based triple antibiotic paste (DTAP), or calcium hydroxide [Ca(OH)₂] and finally irrigated with EDTA. After treatment, one half of each dentin disc was subjected to Vickers microhardness (n = 10 per group) and the other half was used to evaluate the chemical structure (phosphate/amide I ratio) of treated dentin utilizing attenuated total reflection Fourier transform infrared spectroscopy (n = 5 per group). One-way ANOVA followed by Fisher's least significant difference were used for statistical analyses.

Results

Dentin discs treated with different intracanal medicaments and those treated with NaOCl + EDTA showed significant reduction in microhardness (p < 0.0001) and phosphate/amide I ratio (p < 0.05) compared to no treatment control dentin. Furthermore, dentin discs treated with TAP had significantly lower microhardness (p < 0.0001) and phosphate/amide I ratio (p < 0.0001) compared to all other groups.

Conclusions

The use of DTAP or Ca(OH)₂ medicaments during endodontic regeneration may cause significantly less microhardness reduction and superficial demineralization of dentin compared to the use of TAP.

Citations

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Surface microhardness of three thicknesses of mineral trioxide aggregate in different setting conditions: Noushin Shokouhinejad, Leila Jafargholizadeh, Mehrfam Khoshkhounejad, Mohammad Hossein Nekoofar, Maryam Raoof; Restor Dent Endod 2014;39(4):253-257. Published online August 20, 2014; DOI: https://doi.org/10.5395/rde.2014.39.4.253

Abstract PDF PubReader ePub

Objectives

This study aimed to compare the surface microhardness of mineral trioxide aggregate (MTA) samples having different thicknesses and exposed to human blood from one side and with or without a moist cotton pellet on the other side.

Materials and Methods

Ninety cylindrical molds with three heights of 2, 4, and 6 mm were fabricated. In group 1 (dry condition), molds with heights of 2, 4, and 6 mm (10 molds of each) were filled with ProRoot MTA (Dentsply Tulsa Dental), and the upper surface of the material was not exposed to any additional moisture. In groups 2 and 3, a distilled water- or phosphate-buffered saline (PBS)-moistened cotton pellet was placed on the upper side of MTA, respectively. The lower side of the molds in all the groups was in contact with human blood-wetted foams. After 4 day, the Vickers microhardness of the upper surface of MTA was measured.

Results

In the dry condition, the 4 and 6 mm-thick MTA samples showed significantly lower microhardness than the 2 mm-thick samples (p = 0.003 and p = 0.001, respectively). However, when a distilled water- or PBS-moistened cotton pellet was placed over the MTA, no significant difference was found between the surface microhardness of samples having the abovementioned three thicknesses of the material (p = 0.210 and p = 0.112, respectively).

Conclusions

It could be concluded that a moist cotton pellet must be placed over the 4 to 6 mm-thick MTA for better hydration of the material. However, this might not be necessary when 2 mm-thick MTA is used.

Citations

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Christian Khoswanto, Ira Kusuma Dewi
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Sun Mi Jang, Euiseong Kim, Kyung-San Min
Medicina.2021; 57(3): 270. CrossRef
Assessment of Mineral Trioxide Aggregate Setting in Simulated Root Canal with Different Root Canal Wall Thickness: In Vitro Study
Radovan Žižka, Radim Čtvrtlík, Jan Tomáštík, Kamila Fačevicová, Ondřej Vencálek, Jiří Šedý, David Marinčák
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Evaluation of the bioactivity of fluoride‐enriched mineral trioxide aggregate on osteoblasts
S. Proksch, J. Brossart, K. Vach, E. Hellwig, M. J. Altenburger, L. Karygianni
International Endodontic Journal.2018; 51(8): 912. CrossRef
Antimicrobial and antibiofilm activities of MTA supplemented with bismuth lipophilic nanoparticles
Rene HERNANDEZ-DELGADILLO, Casiano DEL ANGEL-MOSQUEDA, Juan Manuel SOLÍS-SOTO, Silvia MUNGUIA-MORENO, Nayely PINEDA-AGUILAR, Rosa Isela SÁNCHEZ-NÁJERA, Shankararaman CHELLAM, Claudio CABRAL-ROMERO
Dental Materials Journal.2017; 36(4): 503. CrossRef
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Mary Anne Sampaio de Melo, Vanara Florêncio Passos, Juliana Paiva Marques Lima, Sérgio Lima Santiago, Lidiany Karla Azevedo Rodrigues
Restorative Dentistry & Endodontics.2016; 41(4): 246. CrossRef

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Evaluation of softening ability of Xylene & Endosolv-R on three different epoxy resin based sealers within 1 to 2 minutes - an in vitro study: Pratima Ramakrishna Shenoi, Gautam Pyarelal Badole, Rajiv Tarachand Khode; Restor Dent Endod 2014;39(1):17-23. Published online January 20, 2014; DOI: https://doi.org/10.5395/rde.2014.39.1.17

Abstract PDF PubReader ePub

Objectives

This study evaluated the efficacy of Endosolv-R and Xylene in softening epoxy resin based sealer after 1 to 2 min exposure.

Materials and Methods

Sixty Teflon molds (6 mm × 1.5 mm in inner diameter and depth) were equally divided into 3 groups of 20 each. AH 26 (Dentsply/De Trey), AH Plus (Dentsply/De Trey), Adseal (Meta-Biomed) were manipulated and placed in the molds allotted to each group and allowed to set at 37℃ in 100% humidity for 2 wk. Each group was further divided into 2 subgroups according to the solvents used, i.e. Xylene (Lobachemie) and Endosolv-R (Septodont). Specimens in each subgroup were exposed to respective solvents for 1 and 2 min and the corresponding Vicker's microhardness (HV) was assessed. Data was analysed by Mauchly's test and two-way analysis of variance (ANOVA) with repeated measures, and one-way ANOVA.

Results

Initial hardness was significantly different among the three sealers with AH Plus having the greatest and Adseal having the least. After 2 min, Xylene softened AH Plus and Adseal sealer to 11% and 25% of their initial microhardness, respectively (p < 0.001), whereas AH 26 was least affected, maintaining 89.4% of its initial microhardness. After 2 min, Endosolv-R softened AH 26, AH Plus and Adseal to 12.7, 5.6 and 8.1% of their initial microhardness, respectively (p < 0.001).

Conclusions

Endosolv-R was a significantly more effective short term softener for all the tested sealers after 2 min whereas Xylene was an effective short term softener against AH plus and Adseal but less effective against AH 26.

Citations

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Paulo Firmino Da Costa Neto, Mariana Bena Gelio, Elisângela Maria Pereira De Souza, Jardel Camilo do Carmo Monteiro, Adirson Jorge Júnior, Thais Piragine Leandrin, José Roberto Cury Saad, Milton Carlos Kuga
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Comparative evaluation of the effectiveness of various solvents on dissolving efficacy of gutta percha- An in vitro- study
Syed Manzoor Ul Haq Bukhari, Sheeeban Rashid, Rahil Bhat
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Tatiane Miranda Manzoli, Joissi Ferrari Zaniboni, João Felipe Besegato, Flávia Angélica Guiotti, Andréa Abi Rached Dantas, Milton Carlos Kuga
Restorative Dentistry & Endodontics.2022;[Epub] CrossRef
Dissolving efficacy of xylene on epoxy resin-based and bioceramic-based root canal sealers
Cindy Willie
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Shruthi Mary Sunil, Balakrishnan Rajkumar, Vishesh Gupta, Akanksha Bhatt, Pragyan Paliwal
IP Indian Journal of Conservative and Endodontics.2020; 5(2): 53. CrossRef
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Inas A Elghandour
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Jéssika Mayhara Pereira Morais, Keli Regina Victorino, Wilfredo Gustavo Escalante‐Otárola, Keren Cristina Fagundes Jordão‐Basso, Regina Guenka Palma‐Dibb, Milton Carlos Kuga
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World Journal of Dentistry.2017; 8(1): 41. CrossRef
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Burhan Can Çanakçi, Ozgur Er, Asiye Dincer
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Inhibitory effect on Streptococcus mutans and mechanical properties of the chitosan containing composite resin: Ji-Sun Kim, Dong-Hoon Shin; Restor Dent Endod 2013;38(1):36-42. Published online February 26, 2013; DOI: https://doi.org/10.5395/rde.2013.38.1.36

Abstract PDF PubReader ePub

Objectives

This study evaluated the antibacterial effect and mechanical properties of composite resins (L_CR, M_CR, H_CR) incorporating chitosan with three different molecular weights (L, Low; M, Medium; H, High).

Materials and Methods

Streptococcus (S). mutans 100 mL and each chitosan powder were inoculated in sterilized 10 mL Brain-Heart Infusion (BHI) solution, and was centrifuged for 12 hr. Absorbance of the supernatent was measured at OD₆₆₀ to estimate the antibacterial activities of chitosan. After S. mutans was inoculated in the disc shaped chitosan-containing composite resins, the disc was cleansed with BHI and diluted with serial dilution method. S. mutans was spread on Mitis-salivarius bacitracin agar. After then, colony forming unit (CFU) was measured to verify the inhibitory effect on S. mutans biofilm. To ascertain the effect on the mechanical properties of composite resin, 3-point bending and Vickers hardness tests were done after 1 and 3 wk water storage, respectively. Using 2-way analysis of variance (ANOVA) and Scheffe test, statistical analysis was done with 95% significance level.

Results

All chitosan powder showed inhibition effect against S. mutans. CFU number in chitosan-containing composite resins was smaller than that of control resin without chitosan. The chitosan containing composite resins did not show any significant difference in flexural strength and Vickers hardness in comparison with the control resin. However, the composite resin, M_CR showed a slightly decreased flexural strength and the maximum load than those of control and the other composite resins H_CR and L_CR.

Conclusions

L_CR and H_CR would be recommended as a feasible antibacterial restorative due to its antibacterial nature and mechanical properties.

Citations

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Color and hardness changes in artificial white spot lesions after resin infiltration: Ji-Hoon Kim, Ho-Hyun Son, Juhea Chang; Restor Dent Endod 2012;37(2):90-95. Published online May 18, 2012; DOI: https://doi.org/10.5395/rde.2012.37.2.90

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to determine the effect of resin infiltration technique on color and surface hardness of white spot lesion (WSL) with various degrees of demineralization.

Materials and Methods

Ten human upper premolars were cut and divided into quarters with a 3 × 4 mm window on the enamel surface. Each specimens were separated into four groups (n = 10) and immersed in demineralization solution to create WSL: control, no treatment (baseline); 12 h, 12 hr demineralization; 24 h, 24 hr demineralization; 48 h, 48 hr demineralization. Resin infiltration was performed to the specimens using Icon (DMG). CIEL^*a^*b^* color parameters of the enamel-dentin complex were determined using a spectroradiometer at baseline, after caries formation and after resin infiltration. Surface hardness was measured by Vickers Micro Hardness Tester (Shimadzu, HMV-2). The differences in color and hardness among the groups were analyzed with ANOVA followed by Tukey test.

Results

Resin infiltration induced color changes and increased the hardness of demineralized enamel. After resin infiltration, there was no difference in color change (ΔE^*) or microhardness among the groups (p < 0.05).

Conclusion

There was no difference in the effect of resin infiltration on color and hardness among groups with different extents of demineralization.

Citations

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Effect of CPP-ACPF, resin infiltration, and colloidal silica infiltration on surface microhardness of artificial white spot lesions in primary teeth: An in vitro study
ArantaAvinash Chindane, AnilT Patil, B Sandhyarani
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IMMEDIATE RESULT OF ICON INFILTRATION IN WHITE SPOT LESIONS CAUSED BY FLUOROSIS: A CASE REPORT
Al-Sadi Abdulaziz Nasser Zain, P.M. Skrypnykov, V.I. Shynkevych, O.A. Pysarenko
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A comparative evaluation of penetration depth and surface microhardness of Resin Infiltrant, CPP-ACPF and Novamin on enamel demineralization after banding: an in vitro study
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Iqra Chaudhary, Abhay M Tripathi
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Effect of Resin Infiltration on Artificial Caries: Anin vitroEvaluation of Resin Penetration and Microhardness
Deepesh Prajapati, Rashmi Nayak, Deepika Pai, Nagraj Upadhya, Vipin K Bhaskar, Pujan Kamath
International Journal of Clinical Pediatric Dentistry.2017; 10(3): 250. CrossRef
Application of quantitative light-induced fluorescence to determine the depth of demineralization of dental fluorosis in enamel microabrasion: a case report
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Restorative Dentistry & Endodontics.2016; 41(3): 225. CrossRef

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Basic Researchs

Effect of glycerin on the surface hardness of composites after curing: Hyun-Hee Park, In-Bog Lee; J Korean Acad Conserv Dent 2011;36(6):483-489. Published online November 30, 2011; DOI: https://doi.org/10.5395/JKACD.2011.36.6.483

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to examine the effect of glycerin topical application on the surface hardness of composite after curing.

Materials and Methods

A composite (Z-250, 3M ESPE) was packed into a disc-shaped brass mold and light cured according to one of the following protocols. Group 1 (control) was exposed to air and light cured for 40 sec, group 2 was covered with a Mylar strip and light cured for 40 sec, group 3 was surface coated with glycerin and light cured for 40 sec, and group 4 was exposed to air and light cured for 20 sec and then surface coated with glycerin and cured for additional 20 sec. Twenty specimens were prepared for each group. The surface hardnesses of specimens were measured with or without polishing. Five days later, the surface hardness of each specimen was measured again. Data were analyzed by three-way ANOVA and Tukey's post hoc tests.

Results

The surface hardnesses of the unpolished specimens immediately after curing decreased in the following order: group 2 > 3 > 4 > 1. For the polished specimens, there was no significant difference among the groups. Within the same group, the hardness measured after five days was increased compared to that immediately after curing, and the polished specimens showed greater hardness than did the unpolished specimens.

Conclusions

The most effective way to increase the surface hardness of composite is polishing after curing. The uses of a Mylar strip or glycerin topical application before curing is recommended.

Citations

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Massimo Pisano, Alfredo Iandolo, Dina Abdellatif, Andrea Chiacchio, Marzio Galdi, Stefano Martina
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Ke Luo, Qian Liu, Abdulaziz Alhotan, Jingtao Dai, An Li, Shulan Xu, Ping Li
Dental Materials.2024; 40(3): 500. CrossRef
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Ferriza Tri Mardianti, Sukaton Sukaton, Galih Sampoerno
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Jorge Cortés-Bretón Brinkmann, Maria Isabel Albanchez-González, Diana Marina Lobato Peña, Ignacio García Gil, Maria Jesús Suárez García, Jesus Peláez Rico
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Asli Topaloglu-Ak, Dilara Çayırgan, Melisa Uslu
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Diana Zakiyah, Ruslan Effendy, Edhie Arif Prasetyo
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Dhaifallah ALQARNI, Masatoshi NAKAJIMA, Keiichi HOSAKA, Kurumi IDE, Daiki NAGANO, Takehiro WADA, Masaomi IKEDA, Teerapong MAMANEE, Ornnicha THANATVARAKORN, Taweesak PRASANSUTTIPORN, Richard FOXTON, Junji TAGAMI
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Titis Mustikaningsih Handayani, Raditya Nugroho, Lusi Hidayati, Dwi Warna Aju Fatmawati, Agus Sumono
Dental Journal.2019; 52(2): 95. CrossRef
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Marcus Vinicius Loureiro BERTOLO, Mário Alexandre Coelho SINHORETI, Julia Puppin RONTANI, Pedro Paulo Albuquerque Cavalcanti de ALBUQUERQUE, Luis Felipe Jochims SCHNEIDER
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Journal of Dentistry.2018; 77: 78. CrossRef
Inibição da polimerização de resinas compostas por materiais usados como matrizes oclusais
Inês Pampulha, João Pitta‐Lopes, Filipa Chasqueira, Jaime Portugal, Sofia Arantes‐Oliveira
Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial.2015; 56(1): 51. CrossRef

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Effect of curing modes on micro-hardness of dual-cure resin cements: Ki-Deok Lee, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho; J Korean Acad Conserv Dent 2011;36(2):132-138. Published online March 31, 2011; DOI: https://doi.org/10.5395/JKACD.2011.36.2.132

Abstract PDF PubReader ePub: Objectives
The purpose of this study was to evaluate curing degree of three dual-cure resin cements with the elapsed time in self-cure and dual-cure mode by means of the repeated measure of micro-hardness.
Materials and Methods
Two dual-cure self-adhesive resin cements studied were Maxcem Elite (Kerr), Rely-X Unicem (3M ESPE) and one conventional dual-cure resin cement was Rely-X ARC resin cement (3M ESPE). Twenty specimens for each cements were made in Teflon mould and divided equally by self-cure and dual-cure mode and left in dark, 36℃, 100% relative humidity conditional-micro-hardness was measured at 10 min, 30 min, 1 hr, 3 hr, 6 hr, 12 hr and 24 hr after baseline. The results of micro-hardness value were statistically analyzed using independent samples t-test and one-way ANOVA with multiple comparisons using Scheffe's test.
Results
The micro-hardness values were increased with time in every test groups. Dual-cure mode obtained higher micro-hardness value than self-cure mode except after one hour of Maxcem. Self-cured Rely-X Unicem showed lowest value and dual-cured Rely-X Unicem showed highest value in every measuring time.
Conclusions
Sufficient light curing to dual-cure resin cements should provided for achieve maximum curing.

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Effect of the difference in spectral outputs of the single and dual-peak LEDs on the microhardness and the color stability of resin composites: Hye-Jung Park, Sung-Ae Son, Bock Hur, Hyeon-Cheol Kim, Yong-Hoon Kwon, Jeong-Kil Park; J Korean Acad Conserv Dent 2011;36(2):108-113. Published online March 31, 2011; DOI: https://doi.org/10.5395/JKACD.2011.36.2.108

Abstract PDF PubReader ePub

Objectives

To determine the effect of the spectral output of single and dual-peak light emitting diode (LED) curing lights on the microhardness and color stability of commercial resin composites formulated with camphorquinone and alternative photoinitiators in combination.

Materials and Methods

Three light-polymerized resin composites (Z100 (3M ESPE), Tetric Ceram (Ivoclar Vivadent) and Aelite LS Posterior (Bisco)) with different photoinitiator systems were used. The resin composites were packed into a Teflon mold (8 mm diameter and 2 mm thickness) on a cover glass. After packing the composites, they were light cured with single-peak and dual-peak LEDs. The Knoop microhardness (KHN) and color difference (ΔE) for 30 days were measured. The data was analyzed statistically using a student's t-test (p < 0.05).

Results

All resin composites showed improved microhardness when a third-generation dual-peak LED light was used. The color stability was also higher for all resin composites with dual-peak LEDs. However, there was a significant difference only for Aelite LS Posterior.

Conclusions

The dual-peak LEDs have a beneficial effect on the microhardness and color stability of resin composites formulated with a combination of camphorquinone and alternative photoinitiators.

Citations

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Dental Materials Journal.2018; 37(1): 33. CrossRef
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Thomas Haenel, Berenika Hausnerová, Johannes Steinhaus, Richard B.T. Price, Braden Sullivan, Bernhard Moeginger
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Journal of Korean Academy of Conservative Dentistry.2011; 36(4): 313. CrossRef

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Original Articles

Effect of pre-heating on some physical properties of composite resin: Myoung Uk Jin, Sung Kyo Kim; J Korean Acad Conserv Dent 2009;34(1):30-37. Published online January 31, 2009; DOI: https://doi.org/10.5395/JKACD.2009.34.1.030

Abstract PDF PubReader ePub

The purpose of this study was to evaluate the effect of pre-heating on some physical properties of composite resin.

Eighty extracted, noncarious human molars were used in the present study. Four different temperatures of composite resin were used: 4℃, 17℃, 48℃, and 56℃. The 4℃ and 17℃ values represented the refrigerator storage temperature and room temperature respectively. For 48℃ and 56℃, composite resin was heated to the temperatures. As physical properties of composite resin, shear bond strength, microhardness, and degree of conversion were measured. The data for each group were subjected to one-way ANOVAs followed by the Tukey's HSD test at 95% confidence level.

Both in enamel and dentin, among composite resin of 4℃, 17℃, 48℃, and 56℃, the pre-heated composite resin up to 56℃ revealed the highest shear bond strength, and pre-heated composite resin to the higher temperature revealed higher shear bond strength.

Microhardness value was also higher with composite resin of higher temperature.

Degree of conversion was also higher with composite resin of the higher temperature.

In this study, it seems that pre-heating composite resin up to the higher temperature may show higher shear bond strength, higher microhardness value, and higher degree of conversion. Therefore, when using composite resin in the clinic, preheating the composite resin could be recommended to have enhanced physical properties of it.

Citations

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Evaluation of Shear Bond Strength of Lithium Disilicate Veneers Using Pre-heated Resin Composite With Two Conventional Resin Cements: An In Vitro Study
Ghalia Akyle, Hassan Achour
Cureus.2024;[Epub] CrossRef
The different effects of preheating and heat treatment on the surface microhardness of nanohybrid resin composite
Brelian Elok Septyarini, Irfan Dwiandhono, Dian N. Agus Imam
Dental Journal.2020; 53(1): 6. CrossRef

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Polymerization of dual cured composites by different thickness: Yun Ju Kim, Myoung Uk Jin, Sung Kyo Kim, Tae-Yub Kwon, Young Kyung Kim; J Korean Acad Conserv Dent 2008;33(3):169-176. Published online May 31, 2008; DOI: https://doi.org/10.5395/JKACD.2008.33.3.169

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The purpose of this study was to evaluate the effect of thickness, filling methods and curing methods on the polymerization of dual cured core materials by means of microhardness test.

Two dual cured core materials, MultiCore Flow (Ivoclar Vivadent AG, Schaan, Liechtenstein) and Bis-Core (Bisco Inc., Schaumburg, IL, USA) were used in this study. 2 mm (bulky filled), 4 mm (bulky filled), 6 mm (bulky and incrementally filled) and 8 mm (bulky and incrementally filled)-thickness specimens were prepared with light cure or self cure mode. After storage at 37℃ for 24 hours, the Knoop hardness values (KHN) of top and bottom surfaces were measured and the microhardness ratio of top and bottom surfaces was calculated. The data were analyzed using one-way ANOVA and Scheffe multiple comparison test, with α = 0.05.

The effect of thickness on the polymerization of dual cured composites showed material specific results. In 2, 4 and 6 mm groups, the KHN of two materials were not affected by thickness. However, in 8 mm group of MultiCore Flow, the KHN of the bottom surface was lower than those of other groups (p < 0.05). The effect of filling methods on the polymerization of dual cured composites was different by their thickness or materials. In 6 mm thickness, there was no significant difference between bulk and incremental filling groups. In 8 mm thickness, Bis-Core showed no significant difference between groups. However, in MultiCore Flow, the microhardness ratio of bulk filling group was lower than that of incremental filling group (p < 0.05). The effect of curing methods on the polymerization of dual cured composites showed material specific results. In Bis-Core, the KHN of dual cured group were higher than those of self cured group at both surfaces (p < 0.05). However, in MultiCore Flow, the results were not similar at both surfaces. At the top surface, dual cured group showed higher KHN than that of self cured group (p < 0.05). However, in the bottom surface, dual cured group showed lower value than that of self cured group (p < 0.05).

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Effect of curing modes on micro-hardness of dual-cure resin cements
Ki-Deok Lee, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho
Journal of Korean Academy of Conservative Dentistry.2011; 36(2): 132. CrossRef

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The effects of tooth bleaching agents on microhardness of enamel in situ: Yoon-Woo Park, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho; J Korean Acad Conserv Dent 2006;31(6):470-476. Published online November 30, 2006; DOI: https://doi.org/10.5395/JKACD.2006.31.6.470

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The objective of this in situ study was to evaluate the effects of whitening strip (Claren, LG Household & Health Care Ltd, 2.6% hydrogen peroxide) and gel (Opalescence, Ultradent, 10% carbamide peroxide) on microhardness of enamel in comparison with untreated control. Extracted twenty human upper incisors were disinfected, cleaned, and labial side of each incisor sectioned into 3 fragments by 2 × 2 mm size. After sectioning, labial sides of fragments were flattened and fixed to orthodontic bracket using flowable composite resin. Specimens prepared from each tooth were attached to the labial side of upper incisors of twenty volunteers one by one and treated by three different methods: (1) untreated control (2) treated with whitening strip for 14 days (3) treated with whitening gel for 14 days.

Microhardness (Microhardness tester, Zwick) of each specimen was measured at the baseline of pre-treatment, immediate after bleaching treatment, 14 days after bleaching treatment and Knoop Hardness Number was determined. Microhardness changes of experimental groups were compared.

The results show that tooth whitening strip and gel used in this study does not effect the micro-hardness of enamel during bleaching procedure.

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Surface Damage and Bleaching Effect according to the Application Type of Home Tooth Bleaching Applicants
Na-Yeoun Tak, Do-Seon Lim, Hee-Jung Lim, Im-Hee Jung
Journal of Dental Hygiene Science.2020; 20(4): 252. CrossRef
Effect of the bleaching light on whitening efficacy
Jong-Hyun Park, Hye-Jin Shin, Deok-Young Park, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho
Journal of Korean Academy of Conservative Dentistry.2009; 34(2): 95. CrossRef

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Influence of thickness on the degree of cure of composite resin core material: Pyoung-Cheol Kwon, Jeong-Won Park; J Korean Acad Conserv Dent 2006;31(5):352-358. Published online September 30, 2006; DOI: https://doi.org/10.5395/JKACD.2006.31.5.352

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The purpose of this study was to investigate the influence of thickness on the degree of cure of dual-cured composite core.

2, 4, 6, 8 mm thickness Luxacore Dual and Luxacore Self (DMG Inc, Hamburg, Germany) core composites were cured by bulk or incremental filling with halogen curing unit or self-cure mode. The specimens were stored at 37℃ for 24 hours and the Knoop's hardness of top and bottom surfaces were measured.

The statistical analysis was performed using ANOVA and Tukey's test at p = 0.05 significance level.

In self cure mode, polymerization is not affected by the thickness. In Luxacore dual, polymerization of the bottom surface was effective in 2, 4 and 6 (incremental) mm specimens. However the 6 (bulk) and 8 (bulk, incremental) mm filling groups showed lower bottom/top hardness ratio (p < 0.05). Within the limitation of this experiment, incremental filling is better than bulk filling in case of over 4 mm depth, and bulk filling should be avoided.

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Strategies for enhancing the shear bond strength using highly acidic universal adhesive and dual-cured composite resin
Sumin Choi, Jin-Woo Kim, Kyung-Mo Cho, Se-Hee Park, Yoon Lee
Journal of Dental Rehabilitation and Applied Science.2025; 41(1): 11. CrossRef
A Study of Composite Surface Hardness When Cured Using Special Accessories with a Curing Light
Samir Koheil
Dental Research and Management.2020; : 11. CrossRef
Effect of curing modes on micro-hardness of dual-cure resin cements
Ki-Deok Lee, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho
Journal of Korean Academy of Conservative Dentistry.2011; 36(2): 132. CrossRef

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