Effect of Polymerization Time and Home Bleaching Agent on the Microhardness and Surface Roughness of Bulk-Fill Composites: A Scanning Electron Microscopy Study

Autor: Magrur Kazak, Zümrüt Ceren Özduman, Rumeysa Hatice Enginler Ozlen, Mehmet Ali Fildisi, Nazmiye Dönmez, Evrim Eliguzeloglu Dalkilic
Přispěvatelé: ÖZLEN, RÜMEYSA HATİCE
Rok vydání: 2018
Předmět:
Materials science
Time Factors
Article Subject
Light
Surface Properties
0206 medical engineering
Bulk fill
02 engineering and technology
Surface finish
Indentation hardness
Composite Resins
Polymerization
03 medical and health sciences
Bleaching Agents
0302 clinical medicine
Hardness
Microscopy
Materials Testing
Surface roughness
Humans
Composite material
lcsh:Microscopy
Instrumentation
Scanning electron microscopy study
Home bleaching
lcsh:QH201-278.5
030206 dentistry
020601 biomedical engineering
Atomic and Molecular Physics
and Optics
A scanning electron microscopy study-
Scanning
cilt.2019
2019 [ÖZDUMAN 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]
Multivariate Analysis
Microscopy
Electron
Scanning
Research Article
Zdroj: Scanning
Scanning, Vol 2019 (2019)
ISSN: 1932-8745
Popis: Objective. 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-WhitneyUtests. 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.
Databáze: OpenAIRE
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