Year : 2018 | Volume
: 21 | Issue : 3 | Page : 285--289
A comparison of dentin bond strength and degree of polymerization of bulk-fill and methacrylate-based flowable composites
Ozcan Karatas, Yusuf Ziya Bayindir
Department of Restorative Dentistry, Atatürk University, Erzurum, Turkey
Objective: This study aimed to evaluate the dentin bond strength and degree of polymerization of bulk-fill and methacrylate-based flowable composites.
Materials and Methods: Dentin bond strength of composites was evaluated using the microtensile bond strength (μTBS) test. Five different composites were applied on flat dentin surfaces with self-etch and etch-and-rinse adhesives. Twenty microspecimens with a 1 mm2 cross-sectional area were prepared for each group (n = 20). The μTBS test was then applied. To measure the degree of polymerization of composites, eight cylindrical blocks were prepared (n = 8) from each composite. The surface microhardness of each composite was measured on the bottom and top surfaces, and a hardness ratio (HR) was calculated. Data were analyzed using one-way ANOVA and the Tukey's honestly significant difference test (α = 0.05).
Results: According to the μTBS test results, the SDR Etch-and-Rinse group exhibited the highest dentin bonding strength and the Aelita self-etch group exhibited the lowest (P < 0.05). HR measurement showed that all composite groups had a sufficient degree of polymerization at a 2-mm thickness, while only the SDR and Xtra-Base groups had sufficient polymerization at a 4-mm thickness.
Conclusions: Bulk-fill composite demonstrates an even higher degree of polymerization of methacrylate-based flowable composite when applied in a 4-mm thickness.
Dr. Ozcan Karatas
Department of Restorative Dentistry, Ataturk University, Erzurum
|How to cite this article:|
Karatas O, Bayindir YZ. A comparison of dentin bond strength and degree of polymerization of bulk-fill and methacrylate-based flowable composites.J Conserv Dent 2018;21:285-289
|How to cite this URL:|
Karatas O, Bayindir YZ. A comparison of dentin bond strength and degree of polymerization of bulk-fill and methacrylate-based flowable composites. J Conserv Dent [serial online] 2018 [cited 2021 Oct 20 ];21:285-289
Available from: https://www.jcd.org.in/article.asp?issn=0972-0707;year=2018;volume=21;issue=3;spage=285;epage=289;aulast=Karatas;type=0