Affiliation:
1. Department of Restorative Dentistry, Dental Faculty, Tehran University of Medical Sciences, Tehran, Iran
2. Department of Restorative Dentistry, Dental Faculty, Birjand University of Medical Sciences, Birjand, Iran
Abstract
Purpose. Wear and increased surface roughness are among the reasons for failure of posterior composite restorations. Considering the widespread use of bulk-fill composites in the posterior region, information about their wear resistance is imperative. The aim of this study was to compare the wear and surface roughness of four bulk-fill composite resins with a conventional composite. Methods. Thirty composite discs (
) were fabricated from EverX Posterior (GC), X-tra fil (Voco), Filtek Bulk-Fill Posterior (3M, USA), SonicFill 2 (Kerr), and Z250 (3M) composites. The baseline weight and surface roughness of specimens were measured. For the assessment of the attrition wear, the specimens were placed in a chewing simulator (Mechatronik). pH cycling was performed to erode the composite discs. They were then placed in a tooth brushing simulator machine (Dorsa) for abrasion wear. Finally, the weight and surface roughness of the specimens were measured. Data were compared using one-way ANOVA (
). Results. One-way ANOVA showed that the mean weight changes were significant after attrition, abrasion, and erosion (
), but changes in surface roughness were not significant (
). The results of Tukey’s test showed no significant difference between the bulk-fill composites and Z250 regarding weight loss (
), but the weight loss of X-tra fil was significantly greater than that of EverX (
) and Filtek Bulk-Fill (
). Conclusions. Considering the limitations of this study, it appears that the wear and surface roughness of bulk-fill composites are within the acceptable range and are not different from those of a conventional composite.
Funder
Tehran University of Medical Sciences
Subject
General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology,General Medicine
Cited by
7 articles.
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