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Effect of water storage on flexural strength of silorane and methacrylate-based composite resins
Narges Panahandeh, Hassan Torabzadeh, Hani Naderi, Seyedeh Mahsa Sheikh-Al-Eslamian
Restor Dent Endod 2017;42(4):309-315.   Published online November 6, 2017
DOI: https://doi.org/10.5395/rde.2017.42.4.309
AbstractAbstract PDFPubReaderePub
Objectives

This study assessed the effect of water storage on the flexural strength (FS) of low shrinkage composites.

Materials and Methods

A total of 165 bar-shaped specimens (2 × 2 × 25 mm) were fabricated of 2 low shrinkage composites (Filtek P90 [3M ESPE], GC Kalore [GC International]) and a conventional methacrylate-based composite (Filtek Z250 [3M ESPE]). The specimens were subjected to 3-point bending test at 6 time intervals, namely: immediately after curing, at 24 hours, 1 week, 1 month, 6 months, and 1 year following storage in wet and dry conditions. The FS of the specimens were measured by applying compressive load at a crosshead speed of 1.0 mm/min. Data was analyzed using 3-way analysis of variance (ANOVA) and Tukey's test.

Results

Three-way ANOVA revealed significant interactions between time, type of composite, and storage condition (p = 0.001). Tukey's multiple comparison test revealed significant reductions in FS of all composites after 6 months and 1 year of storage in distilled water compared to dry condition.

Conclusions

Filtek P90 showed the highest and GC Kalore showed the lowest FS after 1 year storage in distilled water. The immediate high strength of Filtek Z250 significantly decreased at 1 year and its final value was lower than that of Filtek P90.

Citations

Citations to this article as recorded by  
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    Yuke Shou, Lanzhi Deng, Xiaoyu Huang, Xinyu Peng, Xinxuan Zhou, Zheng Wang, Yannan Huang, Bina Yang, Haohao Wang, Min Zhang, Lei Cheng
    Biomolecules.2023; 13(7): 1125.     CrossRef
  • Changes in color and contrast ratio of resin composites after curing and storage in water
    Marlus da Silva Pedrosa, Fernando Neves Nogueira, Vitor de Oliveira Baldo, Igor Studart Medeiros
    The Saudi Dental Journal.2021; 33(8): 1160.     CrossRef
  • Ageing of Dental Composites Based on Methacrylate Resins—A Critical Review of the Causes and Method of Assessment
    Agata Szczesio-Wlodarczyk, Jerzy Sokolowski, Joanna Kleczewska, Kinga Bociong
    Polymers.2020; 12(4): 882.     CrossRef
  • Color stability of nanohybrid composite resins in drinks
    Juliana Jendiroba Faraoni, Isabela Barbosa Quero, Lívia Semedo Schiavuzzo, Regina Guenka Palma-Dibb
    Brazilian Journal of Oral Sciences.2019; 18: e191601.     CrossRef
  • Mechanical Degradation of Different Classes of Composite Resins Aged in Water, Air, and Oil
    Weber Adad Ricci, Priscila Alfano, Saulo Pamato, Carlos Alberto dos Santos Cruz, Jefferson Ricardo Pereira
    BioMed Research International.2019; 2019: 1.     CrossRef
  • Effects of water and microbial-based aging on the performance of three dental restorative materials
    Xinxuan Zhou, Suping Wang, Xian Peng, Yao Hu, Biao Ren, Mingyun Li, Liying Hao, Mingye Feng, Lei Cheng, Xuedong Zhou
    Journal of the Mechanical Behavior of Biomedical Materials.2018; 80: 42.     CrossRef
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The effect of different drinks on the color stability of different restorative materials after one month
Neslihan Tekçe, Safa Tuncer, Mustafa Demirci, Merve Efe Serim, Canan Baydemir
Restor Dent Endod 2015;40(4):255-261.   Published online August 7, 2015
DOI: https://doi.org/10.5395/rde.2015.40.4.255
AbstractAbstract PDFPubReaderePub
Objectives

The aim of this study was to evaluate the effect of three different drinks on the color parameters of four different restorative materials.

Materials and Methods

Three different composites (Filtek Ultimate Universal Restorative, Filtek Ultimate Flowable, and Filtek Silorane, 3M ESPE) and a polyacid-modified composite resin material (Dyract XP, Dentsply DeTrey GmbH) were evaluated. Eighty-four disc-shaped specimens of 8 mm in diameter and 2 mm in thickness were prepared (n = 21 each). Color coordinates (L*a*b*, ΔL*, Δa*, Δb*, and ΔE*) were measured using a VİTA Easyshade Compact (VİTA Zahnfabrik) after 24 hr of storage (baseline) and after 30 day of storage in three different beverages of black tea, Coca cola, or water (control) (n = 7). In each beverage, the specimens were stored three times a day, one hr each, for 30 day. The color changes (ΔE) were calculated and were analyzed by Kruskal-Wallis and Dunn multiple comparison test.

Results

The color difference (ΔE*) of the resin materials ranged between 1.31 and 15.28 after 30 day of immersion in the staining solutions. Dyract XP in Coca cola (15.28 ± 2.61) and black tea (12.22 ± 2.73) showed the highest mean ΔE* value after 30 day, followed by Filtek Ultimate Universal Restorative (5.99 ± 1.25) and Filtek Ultimate Flowable (4.71 ± 1.40) in black tea (p < 0.05).

Conclusions

The compomers displayed unacceptable color changes at the end of 30 day in all beverages. Among resin composites, the silorane based composite exhibited relatively good color stability than the others. Filtek Ultimate Universal Restorative and Filtek Flowable showed similar color changes in all beverages.

Citations

Citations to this article as recorded by  
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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
AbstractAbstract PDFPubReaderePub
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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The effect of resin thickness on polymerization characteristics of silorane-based composite resin
Sung-Ae Son, Hyoung-Mee Roh, Bock Hur, Yong-Hoon Kwon, Jeong-Kil Park
Restor Dent Endod 2014;39(4):310-318.   Published online September 5, 2014
DOI: https://doi.org/10.5395/rde.2014.39.4.310
AbstractAbstract PDFPubReaderePub
Objectives

This study examined the influence of the resin thickness on the polymerization of silorane- and methacrylate-based composites.

Materials and Methods

One silorane-based (Filtek P90, 3M ESPE) and two methacrylate-based (Filtek Z250 and Z350, 3M ESPE) composite resins were used. The number of photons were detected using a photodiode detector at the different thicknesses (thickness, 1, 2 and 3 mm) specimens. The microhardness of the top and bottom surfaces was measured (n = 15) using a Vickers hardness with 200 gf load and 15 sec dwell time conditions. The degree of conversion (DC) of the specimens was determined using Fourier transform infrared spectroscopy (FTIR). Scratched powder of each top and bottom surface of the specimen dissolved in ethanol for transmission FTIR spectroscopy. The refractive index was measured using a Abbe-type refractometer. To measure the polymerization shrinkage, a linometer was used. The results were analyzed using two-way ANOVA and Tukey's test at p < 0.05 level.

Results

The silorane-based resin composite showed the lowest filler content and light attenuation among the specimens. P90 showed the highest values in the DC and the lowest microhardness at all depth. In the polymerization shrinkage, P90 showed a significantly lower shrinkage than the rest two resin products (p < 0.05). P90 showed a significantly lower refractive index than the remaining two resin products (p < 0.05).

Conclusions

DC, microhardness, polymerization rate and refractive index linearly decreased as specimen thickness linearly increased. P90 showed much less polymerization shrinkage compared to other specimens. P90, even though achieved the highest DC, showed the lowest microhardness and refractive index.

Citations

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  • A Year-Long Comparison of Dentin Bond Strength Using the Co-Curing Technique and Conventional Adhesive Application
    Josipa Vukelja Bosnić, Eva Klarić, Ivan Sever, Zrinka Tarle
    Journal of Composites Science.2025; 9(3): 131.     CrossRef
  • The influence of inorganic fillers on the light transmission through resin-matrix composites during the light-curing procedure: an integrative review
    Rita Fidalgo-Pereira, Daniela Carpio, Orlanda Torres, Oscar Carvalho, Filipe Silva, Bruno Henriques, Mutlu Özcan, Júlio C. M. Souza
    Clinical Oral Investigations.2022; 26(9): 5575.     CrossRef
  • Conversion, Polymerization Shrinkage, Heat Generation, and Depth of Cure of Novel Dental Composites
    Saad Liaqat, Humaira Jabeen
    Pakistan BioMedical Journal.2022;[Epub]     CrossRef
  • Effect of Polymerization on the Color of Resin Composites
    B Korkut, G Dokumacigil, N Murat, PY Atali, B Tarcin, GB Gocmen
    Operative Dentistry.2022; 47(5): 514.     CrossRef
  • Shrinkage Stress and Temperature Variation in Resin Composites Cured via Different Photoactivation Methods: Insights for Standardisation of the Photopolymerisation
    Guilherme dos Santos Sousa, Gabriel Felipe Guimarães, Edilmar Marcelino, José Eduardo Petit Rodokas, Arilson José de Oliveira Júnior, Ivana Cesarino, Alcides Lopes Leão, Carla dos Santos Riccardi, Mohammad Arjmand, Rafael Plana Simões
    Polymers.2021; 13(13): 2065.     CrossRef
  • Effect of the incorporation of silica blow spun nanofibers containing silver nanoparticles (SiO2/Ag) on the mechanical, physicochemical, and biological properties of a low-viscosity bulk-fill composite resin
    Soraya Salmanzadeh Ardestani, Roberta Ferreti Bonan, Mariaugusta Ferreira Mota, Rosiane Maria da Costa Farias, Romualdo Rodrigues Menezes, Paulo Rogério Ferreti Bonan, Panmella Pereira Maciel, Flávia Maria de Moraes Ramos-Perez, André Ulisses Dantas Batis
    Dental Materials.2021; 37(10): 1615.     CrossRef
  • Light-Curing Units, Photoinitiators System, and Monomers on Physico-Mechanical Properties of Experimental Composite Resins
    Gustavo Furlan da Silva Prezotto, Weverteon Soares de Lima, Rafael Pino Vitti, Ariel Farias da Silva, Mário Alexandre Coelho Sinhoreti, William Cunha Brandt
    Matéria (Rio de Janeiro).2020;[Epub]     CrossRef
  • Influence of Different Cordless Light-emitting-diode Units and Battery Levels on Chemical, Mechanical, and Physical Properties of Composite Resin
    IO Cardoso, AC Machado, DNR Teixeira, FC Basílio, A Marletta, PV Soares
    Operative Dentistry.2020; 45(4): 377.     CrossRef
  • Shrinkage in composites: An enigma
    Dhakshinamoorthy Malarvizhi, Arumugam Karthick, NewBegin Selvakumar Gold Pearlin Mary, Alagarsamy Venkatesh
    Journal of International Oral Health.2019; 11(5): 244.     CrossRef
  • Development and status of resin composite as dental restorative materials
    Xinxuan Zhou, Xiaoyu Huang, Mingyun Li, Xian Peng, Suping Wang, Xuedong Zhou, Lei Cheng
    Journal of Applied Polymer Science.2019;[Epub]     CrossRef
  • Effect of the Time of Salivary Contamination during Light Curing on Degree of Conversion and Microhardness of a Restorative Composite Resin
    Rasoul Sahebalam, Alireza Boruziniat, Fahimeh Mohammadzadeh, Abdolrasoul Rangrazi
    Biomimetics.2018; 3(3): 23.     CrossRef
  • LIGHT POLYMERIZATION OF PHOTO-CURED COMPOSITE MATERIALS: MODERN APPROACHES AND APPLICATION PECULIARITIES
    O. A. Udod, V. H. Tsentilo, O. M. Adamenko
    Bulletin of Problems Biology and Medicine.2018; 2(4): 72.     CrossRef
  • Resistencia a la compresión del ionómero de vidrio y de la resina compuesta. Estudio in vitro
    Sara Blanco Lerech, Sebastián Frías Tarón, Arnulfo Tarón Dunoyer, José María Bustillo Arrieta, Antonio Díaz Caballero
    Revista Odontológica Mexicana.2017; 21(2): 109.     CrossRef
  • Compressive strength of glass ionomer and composite resin. In vitro study
    Sara Blanco Lerech, Sebastián Frías Tarón, Arnulfo Tarón Dunoyer, José María Bustillo Arrieta, Antonio Díaz Caballero
    Revista Odontológica Mexicana.2017; 21(2): e107.     CrossRef
  • Influência de três modos de fotopolimerização sobre a microdureza de três resinas compostas
    Andréa Cristina Schneider, Márcio José Mendonça, Roberta Bento Rodrigues, Priscilla do Monte Ribeiro Busato, Veridiana Camilotti
    Polímeros.2016; 26(spe): 37.     CrossRef
  • Vickers microhardness comparison of 4 composite resins with different types of filler.
    Rene García-Contreras, Rogelio Scougall-Vilchis, Laura Acosta-Torres, Concepción Arenas-Arrocena, Rigoberto García-Garduño, Javier de la Fuente-Hernández
    Journal Oral Of Research.2015; 4(5): 313.     CrossRef
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Microtensile bond strength of silorane-based composite specific adhesive system using different bonding strategies
Laura Alves Bastos, Ana Beatriz Silva Sousa, Brahim Drubi-Filho, Fernanda de Carvalho Panzeri Pires-de-Souza, Lucas da Fonseca Roberti Garcia
Restor Dent Endod 2015;40(1):23-29.   Published online August 25, 2014
DOI: https://doi.org/10.5395/rde.2015.40.1.23
AbstractAbstract PDFPubReaderePub
Objectives

The aim of this study was to evaluate the effect of pre-etching on the bond strength of silorane-based composite specific adhesive system to dentin.

Materials and Methods

Thirty human molars were randomly divided into 5 groups according to the different bonding strategies. For teeth restored with silorane-based composite (Filtek Silorane, 3M ESPE), the specific self-etching adhesive system (Adhesive System P90, 3M ESPE) was used with and without pre-etching (Pre-etching/Silorane and Silorane groups). Teeth restored with methacrylate based-composite (Filtek Z250, 3M ESPE) were hybridized with the two-step self-etching system (Clearfil SE Bond, Kuraray), with and without pre-etching (Pre-etching/Methacrylate and Methacrylate groups), or three-step adhesive system (Adper Scotchbond Multi-Purpose, 3M ESPE) (Three-step/Methacrylate group) (n = 6). The restored teeth were sectioned into stick-shaped test specimens (1.0 × 1.0 mm), and coupled to a universal test machine (0.5 mm/min) to perform microtensile testing.

Results

Pre-etching/Methacrylate group presented the highest bond strength values, with significant difference from Silorane and Three-step/Methacrylate groups (p < 0.05). However, it was not significantly different from Preetching/Silorane and Methacrylate groups.

Conclusions

Pre-etching increased bond strength of silorane-based composite specific adhesive system to dentin.

Citations

Citations to this article as recorded by  
  • Is the presence of 10-MDP associated to higher bonding performance for self-etching adhesive systems? A meta-analysis of in vitro studies
    Julia Fehrenbach, Cristina Pereira Isolan, Eliseu Aldrighi Münchow
    Dental Materials.2021; 37(10): 1463.     CrossRef
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Effect of 38% carbamide peroxide on the microleakage of silorane-based versus methacrylate-based composite restorations
Sedighe Sadat Hashemi Kamangar, Maryam Ghavam, Nazanin Mahinfar, Seyed Jalal Pourhashemi
Restor Dent Endod 2014;39(3):172-179.   Published online May 13, 2014
DOI: https://doi.org/10.5395/rde.2014.39.3.172
AbstractAbstract PDFPubReaderePub
Objectives

This study aimed to assess the effect of 38% carbamide peroxide on the microleakage of class V cavities restored with either a silorane-based composite or two methacrylate-based composites.

Materials and Methods

A total of 96 class V cavities were prepared on the buccal surface of extracted human teeth with both enamel and dentin margins and were randomly assigned into three groups of Filtek P90 (3M-ESPE) + P90 system adhesive (3M-ESPE)(group A), Filtek Z250 (3M-ESPE) + Adper Prompt L-Pop (3M-ESPE)(group B) and Filtek Z350XT (3M-ESPE) + Adper Prompt L-Pop (group C). Half of the teeth were randomly underwent bleaching (38% carbamide peroxide, Day White, Discus Dental, applying for 15 min, twice a day for 14 day) while the remaining half (control) were not bleached. Dye penetration was measured following immersion in basic fuchsine. Data were statistically analyzed using Kruskal-Wallis and Mann-Whitney U tests at a level of 0.05.

Results

No significant differences were found between composites in the control groups in enamel (p = 0.171) or dentin (p = 0.094) margins. After bleaching, microleakage of Z250 (in enamel [p = 0.867] or dentin [p = 0.590] margins) and Z350 (in enamel [p = 0.445] or dentin [p = 0.591] margins) did not change significantly, but the microleakage of P90 significantly increased in both enamel (p = 0.042) and dentin (p = 0.002) margins.

Conclusions

No significant differences were noted between the bleached and control subgroups of two methacrylate-based composites in enamel or dentin margins. Microleakage of silorane-based composite significantly increased after bleaching.

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Basic Researchs
Effect of adhesive hydrophobicity on microtensile bond strength of low-shrinkage silorane resin to dentin
So-Yeun Cho, Hyun-Young Kang, Kyoung-A Kim, Mi-Kyung Yu, Kwang-Won Lee
J Korean Acad Conserv Dent 2011;36(4):280-289.   Published online July 31, 2011
DOI: https://doi.org/10.5395/JKACD.2011.36.4.280
AbstractAbstract PDFPubReaderePub
Objectives

The purpose of this study was to evaluate µTBS (microtensile bond strength) of current dentin bonding adhesives which have different hydrophobicity with low-shrinkage silorane resin.

Materials and Methods

Thirty-six human third molars were used. Middle dentin was exposed. The teeth were randomly assigned to nine experimental groups: Silorane self-etch adhesives (SS), SS + phosphoric acid etching (SS + pa), Adper easy bond (AE), AE + Silorane system bonding (AE + SSb), Clearfil SE bond (CSE), CSE + SSb, All-Bond 2 (AB2), AB2 + SSb, All-Bond 3 (AB3). After adhesive's were applied, the clinical crowns were restored with Filtek LS (3M ESPE). The 0.8 mm × 0.8 mm sticks were submitted to a tensile load using a Micro Tensile Tester (Bisco Inc.). Water sorption was measured to estimate hydrophobicity adhesives.

Results

µTBS of silorane resin to 5 adhesives: SS, 23.2 MPa; CSE, 19.4 MPa; AB3, 30.3 MPa; AB2 and AE, no bond. Additional layering of SSb: CSE + SSb, 26.2 MPa; AB2 + SSb, 33.9 MPa; AE + SSb, no bond. High value of µTBS was related to cohesive failure. SS showed the lowest water sorption. AE showed the highest solubility.

Conclusions

The hydrophobicity of adhesive increased, and silorane resin bond-strength was also increased. Additional hydrophobic adhesive layer did not increase the bond-strength to silorane resin except AB2 + SSb. All-Bond 3 showed similar µTBS & water sorption with SS. By these facts, we could reach a conclusion that All-Bond 3 is a competitive adhesive which can replace the Silorane adhesive system.

Citations

Citations to this article as recorded by  
  • Microtensile bond strength of silorane-based composite specific adhesive system using different bonding strategies
    Laura Alves Bastos, Ana Beatriz Silva Sousa, Brahim Drubi-Filho, Fernanda de Carvalho Panzeri Pires-de-Souza, Lucas da Fonseca Roberti Garcia
    Restorative Dentistry & Endodontics.2015; 40(1): 23.     CrossRef
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Evaluation of polymerization shrinkage stress in silorane-based composites
Seung-Ji Ryu, Ji-Hoon Cheon, Jeong-Bum Min
J Korean Acad Conserv Dent 2011;36(3):188-195.   Published online May 31, 2011
DOI: https://doi.org/10.5395/JKACD.2011.36.3.188
AbstractAbstract PDFPubReaderePub
Objectives

The purpose of this study was to evaluate the polymerization shrinkage stress among conventional methacrylate-based composite resins and a silorane-based composite resin.

Materials and Methods

The strain gauge method was used for the determination of polymerization shrinkage strain. Specimens were divided by 3 groups according to various composite materials. Filtek Z-250 (3M ESPE) and Filtek P-60 (3M ESPE) were used as a conventional methacrylate-based composites and Filtek P-90 (3M ESPE) was used as a silorane-based composites. Measurements were recorded at each 1 second for the total of 800 seconds including the periods of light application. The results of polymerization shrinkage stress were statistically analyzed using One way ANOVA and Tukey test (p = 0.05).

Results

The polymerization shrinkage stress of a silorane-based composite resin was lower than those of conventional methacrylate-based composite resins (p < 0.05). The shrinkage stress between methacrylate-based composite resin groups did not show significant difference (p > 0.05).

Conclusions

Within the limitation of this study, silorane-based composites showed lower polymerization shrinkage stress than methacrylate-based composites. We need to investigate more into polymerization shrinkage stress with regard to elastic modulus of silorane-based composites for the precise result.

Citations

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  • Polymerization shrinkage and stress analysis during dental restoration observed by digital image correlation method
    Jung-Hoon Park, Nak-Sam Choi
    Journal of Mechanical Science and Technology.2021; 35(12): 5435.     CrossRef
  • Evaluation of the color stability of light cured composite resins according to the resin matrices
    Da-Hye Yu, Hyun-Jin Jung, Sung-Hyeon Choi, In-Nam Hwang
    Korean Journal of Dental Materials.2019; 46(2): 109.     CrossRef
  • Behavior of Polymerization Shrinkage Stress of Methacrylate-based Composite and Silorane-based Composite during Dental Restoration
    Jung-Hoon Park, Nak-Sam Choi
    Composites Research.2015; 28(1): 6.     CrossRef
  • Microtensile bond strength of silorane-based composite specific adhesive system using different bonding strategies
    Laura Alves Bastos, Ana Beatriz Silva Sousa, Brahim Drubi-Filho, Fernanda de Carvalho Panzeri Pires-de-Souza, Lucas da Fonseca Roberti Garcia
    Restorative Dentistry & Endodontics.2015; 40(1): 23.     CrossRef
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A new method to measure the linear polymerization shrinkage of composites using a particle tracking method with computer vision
In-Bog Lee, Sun-Hong Min, Deog-Gyu Seo, Sun-Young Kim, Youngchul Kwon
J Korean Acad Conserv Dent 2010;35(3):180-187.   Published online May 31, 2010
DOI: https://doi.org/10.5395/JKACD.2010.35.3.180
AbstractAbstract PDFPubReaderePub

Since the introduction of restorative dental composites, their physical properties have been significantly improved. However, polymerization shrinkage is still a major drawback. Many efforts have been made to develop a low shrinking composite, and silorane-based composites have recently been introduced into the market. In addition, many different methods have been developed to measure the polymerization shrinkage.

In this study, we developed a new method to measure the linear polymerization shrinkage of composites without direct contact to a specimen using a particle tracking method with computer vision. The shrinkage kinetics of a commercial silorane-based composite (P90) and two conventional methacrylate-based composites (Z250 and Z350) were investigated and compared. The results were as follows:

The linear shrinkage of composites was 0.33-1.41%. Shrinkage was lowest for the silorane-based (P90) composite, and highest for the flowable Z350 composite.

The new instrument was able to measure the true linear shrinkage of composites in real time without sensitivity to the specimen preparation and geometry.

Citations

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  • Effect of layering methods, composite type, and flowable liner on the polymerization shrinkage stress of light cured composites
    Youngchul Kwon, Jack Ferracane, In-Bog Lee
    Dental Materials.2012; 28(7): 801.     CrossRef
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Polymerization shrinkage kinetics of silorane-based composites
Youngchul Kwon, In-Bog Lee
J Korean Acad Conserv Dent 2010;35(1):51-58.   Published online January 31, 2010
DOI: https://doi.org/10.5395/JKACD.2010.35.1.051
AbstractAbstract PDFPubReaderePub

Dental composites have improved significantly in physical properties over the past few decades. However, polymerization shrinkage and stress is still the major drawback of composites, limiting its use to selected cases. Much effort has been made to make low shrinking composites to overcome this issue and silorane-based composites have recently been introduced into the market.

The aim of this study was to measure the volumetric polymerization shrinkage kinetics of a silorane-based composite and compare it with conventional methacrylate-based composites in order to evaluate its effectiveness in reducing polymerization shrinkage.

Five commercial methacrylate-based (Beautifil, Z100, Z250, Z350 and Gradia X) and a silorane-based (P90) composites were investigated. The volumetric change of the composites during light polymerization was detected continuously as buoyancy change in distilled water by means of Archemedes'principle, using a newly made volume shrinkage measurement instrument. The null hypothesis was that there were no differences in polymerization shrinkage, peak polymerization shrinkage rate and peak shrinkage time between the silorane-based composite and methacrylate-based composites. The results were as follows:

The shrinkage of silorane-based (P90) composites was the lowest (1.48%), and that of Beautifil composite was the highest (2.80%). There were also significant differences between brands among the methacrylate-based composites.

Peak polymerization shrinkage rate was the lowest in P90 (0.13%/s) and the highest in Z100 (0.34%/s).

The time to reach peak shrinkage rate of the silorane-based composite (P90) was longer (6.7 s) than those of the methacrylate-based composites (2.4-3.1 s).

Peak shrinkage rate showed a strong positive correlation with the product of polymerization shrinkage and the inverse of peak shrinkage time (R = 0.95).

Citations

Citations to this article as recorded by  
  • Comparison of polymerization shrinkage of dual-cure core build-up resin according to shade and curing mode
    Yoorina Choi, Karl Lee, Hoon-Sang Chang
    Oral Biology Research.2019; 43(4): 243.     CrossRef
  • Evaluation of polymerization shrinkage stress in silorane-based composites
    Seung-Ji Ryu, Ji-Hoon Cheon, Jeong-Bum Min
    Journal of Korean Academy of Conservative Dentistry.2011; 36(3): 188.     CrossRef
  • A new method to measure the linear polymerization shrinkage of composites using a particle tracking method with computer vision
    In-Bog Lee, Sun-Hong Min, Deog-Gyu Seo, Sun-Young Kim, Youngchul Kwon
    Journal of Korean Academy of Conservative Dentistry.2010; 35(3): 180.     CrossRef
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