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dc.contributor.authorKazak, Magrur
dc.contributor.authorDÖNMEZ, NAZMİYE
dc.contributor.authorÖZLEN, RÜMEYSA HATİCE
dc.contributor.authorFİLDİŞİ, MEHMET ALİ
dc.contributor.authorÖZDUMAN, ZÜMRÜT CEREN
dc.contributor.authorDALKILIÇ, Evrim
dc.date.accessioned2020-01-13T20:59:39Z
dc.date.available2020-01-13T20:59:39Z
dc.date.issued2019-01-01T00:00:00Z
dc.identifier.urihttps://openaccess.bezmialem.edu.tr/handle/20.500.12645/12290
dc.description.abstractObjective: The aim of this study is to evaluate the microhardness and surface roughness of two different bulk-fill composites polymerized with light-curing unit (LCU) with different polymerization times before and after the application of a home bleaching agent. Materials-methods: For both microhardness and surface roughness tests, 6 groups were prepared with bulk-fill materials (SonicFill, Filtek Bulk Fill) according to different polymerization times (10, 20, and 30 s). 102 specimens were prepared using Teflon molds (4 mm depth and 5 mm diameter) and polymerized with LCU. 30 specimens (n = 5) were assessed for microhardness. Before home bleaching agent application, the bottom/top (B/T) microhardness ratio was evaluated. After bleaching agent application, the microhardness measurements were performed on top surfaces. Roughness measurements were performed in 72 specimens (n = 12) before and after bleaching application. Additionally, for SEM analyses, two specimens from all tested groups were prepared before and after bleaching agent application. The data B/T microhardness ratio before bleaching was analyzed by two-way ANOVA and Tukey's HSD test. The data from the top surface of specimens' microhardness before and after bleaching were analyzed using Wilcoxon signed-rank test, Kruskal-Wallis, Mann-Whitney U tests. The data from surface roughness tests were statistically analyzed by multivariate analysis of variance and Bonferroni test (p < 0.05). Results: The B/T microhardness ratio results revealed no significant differences between groups (p > 0.05). Comparing the microhardness values of the composites' top surfaces before and after bleaching, a significant decrease was observed exclusively in FB30s (p < 0.05). No significant differences in surface roughness values were observed when the groups were compared based on bulk-fill materials (p > 0.05) while the polymerization time affected the surface roughness of the SF20s and SF30s groups (p < 0.05). After bleaching, surface roughness values were significantly increased in the SF20s and SF30s groups (p < 0.05). Conclusion: The clinicians should adhere to the polymerization time recommended by the manufacturer to ensure the durability of the composite material in the oral environment.en
dc.rightsinfo:eu-repo/semantics/openAccessen
dc.subjectÖZDUMAN Z. C. , Kazak M., FİLDİŞİ M. A. , ÖZLEN R. H. , DALKILIÇ E., DÖNMEZ N., -Effect of polymerization time and home bleaching agent on the microhardness and surface roughness of bulk-fill composites: A scanning electron microscopy study-, Scanning, cilt.2019, 2019
dc.titleEffect of polymerization time and home bleaching agent on the microhardness and surface roughness of bulk-fill composites: A scanning electron microscopy study
dc.typeArticle
dc.identifier.wosWOS:000471944700001
dc.identifier.scopus85069289556
dc.identifier.doi10.1155/2019/2307305
dc.identifier.pubmed31281561
local.publication.isinternational1


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