Dental Materials Area, Piracicaba School of Dentistry, State University of Campinas, Brazil.
J Appl Oral Sci. 2003 Dec;11(4):348-53. doi: 10.1590/s1678-77572003000400014.
The aim of this study was to evaluate the surface roughness of two Ormocer-based resin composites before and after mechanical toothbrushing. The study compared the brands Admira and Definite with composites based on conventional monomer systems (Bis-GMA, Bis-EMA, UEDMA e TEGDMA), Z250 and A110. Eight samples of each material with 4mm in diameter and 2mm in height were prepared using a metallic mold. After 24 hours they were polished and examined with a profilometer for measurement of the initial surface roughness (Ra, mm) before mechanical toothbrushing (30,000 cycles). After toothbrushing, the samples were taken to the profilometer once again to check the final surface roughness. The results were submitted to ANOVA and Tukey test (5%). The Admira composite presented a higher mean of surface roughness before toothbrushing (0.132mm), with a statistical difference from the composite A110 (0.082mm). Definite (0.110mm) and Z250 (0.105mm) composites showed no differences between themselves or among the other composites. No statistical differences were observed after toothbrushing between the composites Definite (0.178mm), Z250 (0.187mm), Admira (0.181mm), and A110 (0.193mm). All composites showed a statistically significant increase in the surface roughness after toothbrushing.
本研究旨在评估两种基于 Ormocer 的树脂复合材料在机械刷牙前后的表面粗糙度。该研究比较了品牌 Admira 和 Definite 与基于传统单体系统（Bis-GMA、Bis-EMA、UEDMA 和 TEGDMA）的复合材料 Z250 和 A110。使用金属模具制备了每种材料的 8 个直径为 4mm、高度为 2mm 的样本。24 小时后，对它们进行抛光并用轮廓仪测量初始表面粗糙度（Ra，mm），然后进行机械刷牙（30000 次循环）。刷牙后，再次将样品带到轮廓仪上检查最终表面粗糙度。结果提交给方差分析和 Tukey 检验（5%）。Admira 复合材料在刷牙前的平均表面粗糙度较高（0.132mm），与 A110 复合材料（0.082mm）存在统计学差异。Definite（0.110mm）和 Z250（0.105mm）复合材料之间以及与其他复合材料之间均无差异。刷牙后，Definite（0.178mm）、Z250（0.187mm）、Admira（0.181mm）和 A110（0.193mm）复合材料之间没有观察到统计学差异。所有复合材料在刷牙后表面粗糙度均显著增加。
