Volume 10, Issue 3 (9-2025)
J Res Dent Maxillofac Sci 2025, 10(3): 228-237 |
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Ethics code: IR.TUMS.DENTISTRY.REC.1399.115
Clinical trials code: IR.TUMS.DENTISTRY.REC.1399.115
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Yarmoradian S, Ranjbar Omrani L, Ahmadi E, Rafeie N, Abbasi M, Dabiri Shahabi N. Repair Bond Strength of Aged Composite: Effect of Thermocycling and Surface Treatment. J Res Dent Maxillofac Sci 2025; 10 (3) :228-237
URL: http://jrdms.dentaliau.ac.ir/article-1-780-en.html
URL: http://jrdms.dentaliau.ac.ir/article-1-780-en.html
Sina Yarmoradian1 
, Ladan Ranjbar Omrani2 , Elham Ahmadi2 , Niyousha Rafeie3 , Mahdi Abbasi2 , Nastaran Dabiri Shahabi *4
, Ladan Ranjbar Omrani2 , Elham Ahmadi2 , Niyousha Rafeie3 , Mahdi Abbasi2 , Nastaran Dabiri Shahabi *4
1- Department of Prosthetic Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Tehran, Iran.
2- Dental Research Center, Dentistry Research Institute, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
3- Department of Restorative Dentistry, Dental Research Center, Dentistry Research Institute, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
4- Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. ,ndabiry@gmail.com
2- Dental Research Center, Dentistry Research Institute, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
3- Department of Restorative Dentistry, Dental Research Center, Dentistry Research Institute, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
4- Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. ,
Abstract: (16 Views)
Background and Aim: A variety of surface preparation techniques have been applied to increase the repair bond strength of composite restorations. The current study aimed to assess how silane and/or plasma application, bur roughening, sandblasting, and thermocycling would affect the microshear bond strength (µSBS) of composite repair employing a universal adhesive.
Materials and Methods: The current in vitro study utilized 128 composite specimens (10 x 10 x 10 mm) that were stored in 37°C water for 4 weeks and then randomly divided into two groups (n = 64) for surface treatment by sandblasting or bur roughening. Then, each group was divided into four subgroups (n=16) and received surface treatments as follows: No plasma or silane, plasma application, silane application, plasma and silane application. The new composite was then bonded to each specimen using G-Premio Bond. Half of each subgroup (n=8) underwent 5000 thermal cycles, while the other half was stored in water for 24 hours. Finally, the repair µSBS was measured. Four-way ANOVA was used for data analysis (alpha=0.05).
Results: Thermocycling significantly decreased the µSBS (P=0.000). Significantly greater µSBS (13.35±3.82 N; P=0.014) was achieved when physical methods were used alone without plasma or silane. Silane reduced the repair µSBS following sandblasting, but significantly increased the repair µSBS after bur roughening. Plasma treatment did not have a significant effect on µSBS (P>0.05).
Conclusion: Sandblasting greatly enhanced the repair µSBS. The repair µSBS of the roughened composite samples was unaffected by plasma treatment. The type of physical treatment determines how well silane improves the repair µSBS.
Materials and Methods: The current in vitro study utilized 128 composite specimens (10 x 10 x 10 mm) that were stored in 37°C water for 4 weeks and then randomly divided into two groups (n = 64) for surface treatment by sandblasting or bur roughening. Then, each group was divided into four subgroups (n=16) and received surface treatments as follows: No plasma or silane, plasma application, silane application, plasma and silane application. The new composite was then bonded to each specimen using G-Premio Bond. Half of each subgroup (n=8) underwent 5000 thermal cycles, while the other half was stored in water for 24 hours. Finally, the repair µSBS was measured. Four-way ANOVA was used for data analysis (alpha=0.05).
Results: Thermocycling significantly decreased the µSBS (P=0.000). Significantly greater µSBS (13.35±3.82 N; P=0.014) was achieved when physical methods were used alone without plasma or silane. Silane reduced the repair µSBS following sandblasting, but significantly increased the repair µSBS after bur roughening. Plasma treatment did not have a significant effect on µSBS (P>0.05).
Conclusion: Sandblasting greatly enhanced the repair µSBS. The repair µSBS of the roughened composite samples was unaffected by plasma treatment. The type of physical treatment determines how well silane improves the repair µSBS.
Type of Study: Original article |
Subject:
Restorative Dentistry
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