Restorative Dentistry & Endodontics

Research Articles

Effect of surface treatment on the mechanical properties of nickel-titanium files with a similar cross-section: Sang Won Kwak, Joo Yeong Lee, Hye-Jin Goo, Hyeon-Cheol Kim; Restor Dent Endod 2017;42(3):216-223. Published online June 28, 2017; DOI: https://doi.org/10.5395/rde.2017.42.3.216

Objectives

The aim of this study was to compare the mechanical properties of various nickel-titanium (NiTi) files with similar tapers and cross-sectional areas depending on whether they were surface-treated.

Materials and Methods

Three NiTi file systems with a similar convex triangular cross-section and the same ISO #25 tip size were selected for this study: G6 (G6), ProTaper Universal (PTU), and Dia-PT (DPT). To test torsional resistance, 5 mm of the straightened file's tip was fixed between polycarbonate blocks (n = 15/group) and continuous clockwise rotation until fracture was conducted using a customized device. To evaluate cyclic fatigue resistance, files were rotated in an artificial curved canal until fracture in a dynamic mode (n = 15/group). The torsional data were analyzed using 1-way analysis of variance and the Tukey post-hoc comparison test, while the cyclic fatigue data were analyzed using the Mann-Whitney U test at a significance level of 95%.

Results

PTU showed significantly greater toughness, followed by DPT and G6 (p < 0.05). G6 showed the lowest resistance in ultimate torsional strength, while it showed a higher fracture angle than the other files (p < 0.05). In the cyclic fatigue test, DPT showed a significantly higher number of cycles to failure than PTU or G6 (p < 0.05).

Conclusions

Within the limitations of this study, it can be concluded that the torsional resistance of NiTi files was affected by the cross-sectional area, while the cyclic fatigue resistance of NiTi files was influenced by the surface treatment.

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FARKLI YAPISAL ÖZELLİKTEKİ NİKEL-TİTANYUM KÖK KANAL EĞELERİNİN SODYUM HİPOKLORİT VE SERUM FİZYOLOJİK ÇÖZELTİLERİNDEKİ DÖNGÜSEL YORGUNLUK DİRENÇLERİNİN KARŞILAŞTİRİLMASI
Abdulkadir ÖZŞAHİN, Meltem DARTAR ÖZTAN, Emine ODABAŞI TEZER
Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi.2021; : 1. CrossRef
Heat Treatment and Surface Treatment of Nickel–Titanium Endodontic Instruments
Sang Won Kwak, Ya Shen, He Liu, Zhejun Wang, Hyeon-Cheol Kim, Markus Haapasalo
Frontiers in Dental Medicine.2021;[Epub] CrossRef
Torsional Resistance of Two New Heat Treated Nickel Titanium Rotary Instruments: An in Vitro Evaluation
Gianluca Gambarini, Gabriele Miccoli, Dario Di Nardo, Andrea Del Giudice, Alessandro Mazzoni, Marco Seracchiani, Luca Testarelli
Pesquisa Brasileira em Odontopediatria e Clínica Integrada.2020;[Epub] CrossRef

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The effects of non-thermal plasma and conventional treatments on the bond strength of fiber posts to resin cement: Maíra do Prado, Eduardo Moreira da Silva, Juliana das Neves Marques, Caroline Brum Gonzalez, Renata Antoun Simão; Restor Dent Endod 2017;42(2):125-133. Published online April 11, 2017; DOI: https://doi.org/10.5395/rde.2017.42.2.125

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Objectives

This study compared the effect of hexamethyldisiloxane (HMDSO) and ammonia (NH₃) plasmas on the bond strength of resin cement to fiber posts with conventional treatments.

Materials and Methods

Sixty-five fiber posts were divided into 5 groups: Control (no surface treatment); H₂O₂ (24% hydrogen peroxide for 1 min); Blasting (blasting with aluminum oxide for 30 sec); NH₃ (NH₃ plasma treatment for 3 min); HMDSO (HMDSO plasma treatment for 15 min). After the treatments, the Ambar adhesive (FGM Dental Products) was applied to the post surface (n = 10). The fiber post was inserted into a silicon matrix that was filled with the conventional resin cement Allcem Core (FGM). Afterwards, the post/cement specimens were cut into discs and subjected to a push-out bond strength (POBS) test. Additionally, 3 posts in each group were evaluated using scanning electron microscopy. The POBS data were analyzed by one-way analysis of variance and the Tukey's honest significant difference post hoc test (α = 0.05).

Results

The Blasting and NH₃ groups showed the highest POBS values. The HMDSO group showed intermediate POBS values, whereas the Control and H₂O₂ groups showed the lowest POBS values.

Conclusion

Blasting and NH₃ plasma treatments were associated with stronger bonding of the conventional resin cement Allcem to fiber posts, in a procedure in which the Ambar adhesive was used.

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Effect of Cold Atmospheric Plasma Treatment on the Bond Strength of Glass Fiber Posts
Elif Şeyma Kaban, Gizem Dilara Özdemir, Ilgın İlgenli, Utku Kürşat Ercan
Plasma Medicine.2024; 14(1): 17. CrossRef
Effect of non-thermal argon plasma on the shear strength of adhesive systems
Isabella de Almeida Guimarães Passos, Juliana das Neves Marques, João Victor Frazão Câmara, Renata Antoun Simão, Maíra do Prado, Gisele Damiana da Silveira Pereira
Polímeros.2022;[Epub] CrossRef
The Oleofobization of Paper via Plasma Treatment
Matic Resnik, Eva Levičnik, Žiga Gosar, Rok Zaplotnik, Janez Kovač, Jernej Ekar, Miran Mozetič, Ita Junkar
Polymers.2021; 13(13): 2148. CrossRef
Analysis of physical properties of facial silicones with different pigmentations submitted to nonthermal plasma treatment and accelerated aging
Marcela Borghi Paulini, Daniela Micheline dos Santos, Clóvis Lamartine de Moraes Melo Neto, Sandro Basso Bitencourt, Emily Vivianne Freitas da Silva, Fernanda Pereira de Caxias, Rafael Parra Ribeiro, Elidiane Cipriano Rangel, Mariana Vilela Sônego, Marcel
The Journal of Prosthetic Dentistry.2020; 124(6): 815.e1. CrossRef
Effect of different surface treatments on the shear bond strength of luting cements used with implant-supported prosthesis: Anin vitrostudy
Kubra Degirmenci, Serkan Saridag
The Journal of Advanced Prosthodontics.2020; 12(2): 75. CrossRef
Non-thermal plasma treatment to enhance the adhesion between enamel surface and orthodontic bracket
Salem Almoammar, Ibrahim AlShahrani, Moshabab A. Asiry, Simone Duarte, Malvin Janal, Edmund Khoo
Bio-Medical Materials and Engineering.2019; 30(4): 439. CrossRef

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Effect of antioxidants on push-out bond strength of hydrogen peroxide treated glass fiber posts bonded with two types of resin cement: Maryam Khoroushi, Hamid Mazaheri, Pardis Tarighi, Pouran Samimi, Navid Khalighinejad; Restor Dent Endod 2014;39(4):303-309. Published online September 2, 2014; DOI: https://doi.org/10.5395/rde.2014.39.4.303

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Objectives

Hydrogen peroxide (H₂O₂) surface treatment of fiber posts has been reported to increase bond strength of fiber posts to resin cements. However, residual oxygen radicals might jeopardize the bonding procedure. This study examined the effect of three antioxidant agents on the bond strength of fiber posts to conventional and self-adhesive resin cements.

Materials and Methods

Post spaces were prepared in forty human maxillary second premolars. Posts were divided into five groups of 8 each: G1 (control), no pre-treatment; G2, 10% H₂O₂ pre-treatment; G3, G4 and G5. After H₂O₂ application, Hesperidin (HES), Sodium Ascorbate (SA) or Rosmarinic acid (RA) was applied on each group respectively. In each group four posts were cemented with Duo-Link conventional resin cement and the others with self-adhesive BisCem cement. Push-out test was performed and data were analyzed using 2-way ANOVA and tukey's post-hoc test (α = 0.05).

Results

There was a statistically significant interaction between the cement type and post surface treatment on push-out bond strength of fiber posts (p < 0.001, F = 16). Also it was shown that different posts' surface treatments significantly affect the push-out bond strength of fiber posts (p = 0.001). H₂O₂ treated posts (G2) and control posts (G1) cemented with Duo-link showed the highest (15.96 ± 5.07MPa) and lowest bond strengths (6.79 ± 3.94) respectively.

Conclusions

It was concluded that H₂O₂ surface treatment might enhance the bond strength of fiber posts cemented with conventional resin cements. The effect of antioxidants as post's surface treatment agents depends on the characteristics of resin cements used for bonding procedure.

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Comparison of the push-out bond strength of AH Plus sealer to dentin after using different herbal irrigation solutions as the final rinse
Mohammadreza Nabavizadeh, Fereshte Sobhnamayan, Mahdi Sedigh-Shams, Sepideh Liaghat, Ajinkya M. Pawar
PLOS ONE.2022; 17(11): e0276666. CrossRef
The influence of different treatments on fiber post and root canal to bond strength of fiber post
Deli Niu, Jinfang Xie, Chang Liu, Shanling Ni, Hong Liu
Journal of Adhesion Science and Technology.2021; 35(9): 928. CrossRef
Effect of surface treatment on the dislocation resistance of prefabricated esthetic fiber posts bonded with self-adhesive resin cement: A systematic review and meta-analysis
ShwetaElizabeth Jacob, SabahMohd Zubair, ManuelSebastian Thomas, Vinod Jathanna, Ramya Shenoy
Journal of Conservative Dentistry.2021; 24(2): 113. CrossRef
Dentin pretreatment with Er:YAG laser and sodium ascorbate to improve the bond strength of glass fiber post
Laís Lima Pelozo, Reinaldo Dias Silva-Neto, Silmara Aparecida Milori Corona, Regina Guenka Palma-Dibb, Aline Evangelista Souza-Gabriel
Lasers in Medical Science.2019; 34(1): 47. CrossRef
Test methods for bond strength of glass fiber posts to dentin: A review
F. C. Dos Santos, M. D. Banea, H. L. Carlo, S. De Barros
The Journal of Adhesion.2017; 93(1-2): 159. CrossRef
Effects of hydrogen peroxide pretreatment and heat activation of silane on the shear bond strength of fiber-reinforced composite posts to resin cement
Jung-Hoon Pyun, Tae-Bong Shin, Joo-Hee Lee, Kang-Min Ahn, Tae-Hyung Kim, Hyun-Suk Cha
The Journal of Advanced Prosthodontics.2016; 8(2): 94. CrossRef

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Basic Research

The study of fractural behavior of repaired composite: Sang-Soon Park, Wook Nam, Ah-Hyang Eom, Duck-Su Kim, Gi-Woon Choi, Kyoung-Kyu Choi; J Korean Acad Conserv Dent 2010;35(6):461-472. Published online November 30, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.6.461

Abstract PDF PubReader ePub: Objectives
This study evaluated microtensile bond strength (µTBS) and short-rod fracture toughness to explain fractural behavior of repaired composite restorations according to different surface treatments.
Materials and Methods
Thirty composite blocks for µTBS test and sixty short-rod specimens for fracture toughness test were fabricated and were allocated to 3 groups according to the combination of surface treatment (none-treated, sand blasting, bur roughening). Each group was repaired immediately and 2 weeks later. Twenty-four hours later from repair, µTBS and fracture toughness test were conducted. Mean values analyzed with two-way ANOVA / Tukey's B test (α = 0.05) and correlation analysis was done between µTBS and fracture toughness. FE-SEM was employed on fractured surface to examine the crack propagation.
Results
The fresh composite resin showed higher µTBS than the aged composite resin (p < 0.001). Mechanically treated groups showed higher bond strength than non-mechanically treated groups except none-treated fresh group in µTBS (p < 0.05). The fracture toughness value of mechanically treated surface was higher than that of non-mechanically treated surface (p < 0.05). There was no correlation between fracture toughness and microtensile bond strength values. Specimens having high K_IC showed toughening mechanism including crack deviation, microcracks and crack bridging in FE-SEM.
Conclusions
Surface treatment by mechanical interlock is more important for effective composite repair, and the fracture toughness test could be used as an appropriate tool to examine the fractural behavior of the repaired composite with microtensile bond strength.

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Original Articles

Influence of adhesive application on shear bond strength of the resin cement to indirect resin composite: Mi-Hae Song, Su-Jung Park, Hyun-Gu Cho, Yun-Chan Hwang, Won-Mann Oh, In-Nam Hwang; J Korean Acad Conserv Dent 2008;33(5):419-427. Published online September 30, 2008; DOI: https://doi.org/10.5395/JKACD.2008.33.5.419

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This study analyzed the influence of dental adhesive/primer on the bond strength between indirect resin composite and the resin cement.

Seventy disc specimens of indirect resin composite (Tescera Dentin, Bisco) were fabricated. And bonding area of all specimens were sandblasted and silane treated for one minute. The resin cements were used with or without application of adhesive/primer to bonding area of indirect resin restoration: Variolink-II (Ivoclar-Vivadent): Exite DSC, Panavia-F (Kuraray): ED-Primer, RelyX Unicem (3M ESPE): Single-Bond, Duolink (Bisco): One-step, Mulitlink (Ivoclar-Vivadent): Multilinh Primer.

Shear bond strength was measured by Instron universal testing machine.

Adhesive application improved shear bond strength (p < 0.05). But Variolink II and Panavia-F showed no statistically significant difference according to the adhesive application.

With the above results, when resin inlay is luted by resin cement it seems that application of dental adhesive/primer is necessary in order to improve the bond strength.

Citations

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Shear bond strength of a self-adhesive resin cement to resin-coated dentin
Jee-Youn Hong, Cheol-Woo Park, Jeong-Uk Heo, Min-Ki Bang, Jae-Jun Ryu
The Journal of Korean Academy of Prosthodontics.2013; 51(1): 27. CrossRef
Microtensile bond strength of self-etching and self-adhesive resin cements to dentin and indirect composite resin
Jae-Gu Park, Young-Gon Cho, Il-Sin Kim
Journal of Korean Academy of Conservative Dentistry.2010; 35(2): 106. CrossRef
Effect of a desensitizer on dentinal bond strength in cementation of composite resin inlay
Sae-Hee Han, Young-Gon Cho
Journal of Korean Academy of Conservative Dentistry.2009; 34(3): 223. CrossRef
Effect of curing methods of resin cements on bond strength and adhesive interface of post
Mun-Hong Kim, Hae-Jung Kim, Young-Gon Cho
Journal of Korean Academy of Conservative Dentistry.2009; 34(2): 103. CrossRef
Effect of dentin surface wetness on tensile bond strength of self adhesive resin cements
Sung-Young Yoon, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho
Journal of Korean Academy of Conservative Dentistry.2009; 34(2): 113. CrossRef

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The effect of reinforcing methods on fracture strength of composite inlay bridge: Chang-Won Byun, Sang-Hyuk Park, Sang-Jin Park, Kyoung-Kyu Choi; J Korean Acad Conserv Dent 2007;32(2):111-120. Published online March 31, 2007; DOI: https://doi.org/10.5395/JKACD.2007.32.2.111

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The purpose of this study is to evaluate the effects of surface treatment and composition of reinforcement material on fracture strength of fiber reinforced composite inlay bridges.

The materials used for this study were I-beam, U-beam TESCERA ATL system and ONE STEP(Bisco, IL, USA). Two kinds of surface treatments were used; the silane and the sandblast. The specimens were divided into 11 groups through the composition of reinforcing materials and the surface treatments.

On the dentiform, supposing the missing of Maxillary second pre-molar and indirect composite inlay bridge cavities on adjacent first pre-molar disto-occlusal cavity, first molar mesio-occlusal cavity was prepared with conventional high-speed inlay bur.The reinforcing materials were placed on the proximal box space and build up the composite inlay bridge consequently. After the curing, specimen was set on the testing die with ZPC. Flexural force was applied with universal testing machine (EZ-tester; Shimadzu, Japan). at a cross-head speed of 1 mm/min until initial crack occurred. The data wasanalyzed using one-way ANOVA/Scheffes' post-hoc test at 95% significance level.

Groups using I-beam showed the highest fracture strengths (p < 0.05) and there were no significant differences between each surface treatment (p > 0.05). Most of the specimens in groups that used reinforcing material showed delamination.

The use of I-beam represented highest fracture strengths (p < 0.05).

In groups only using silane as a surface treatment showed highest fracture strength, but there were no significant differences between other surface treatments (p > 0.05).

The reinforcing materials affect the fracture strength and pattern of composites inlay bridge.

The holes at the U-beam did not increase the fracture strength of composites inlay bridge.

Citations

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Esthetic rehabilitation of single anterior edentulous space using fiber-reinforced composite
Hyeon Kim, Min-Ju Song, Su-Jung Shin, Yoon Lee, Jeong-Won Park
Restorative Dentistry & Endodontics.2014; 39(3): 220. CrossRef

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