Latta M A, Barkmeier W W, Wilwerding T M, Blake S M
Department of General Dentistry, Creighton University School of Dentistry, Center for Oral Health Research, Omaha NE 68178, USA.
Am J Dent. 2001 Aug;14(4):238-40.
To determine and compare the localized wear of six compomer restorative materials.
Ten specimens of Dyract, Dyract AP, F2000, Compoglass F, Elan and Hytac were prepared in a custom fixture and polished. A pretest surface profile was generated using an MTS 3-D surface profilometer and the specimens were subjected to 400,000 cycles in a Leinfelder wear machine equipped with a conical stylus tip to simulate localized wear. A post-test profile was generated and the before and after profiles were fitted and analyzed using AnSur 3-D software. The total volume loss and depth of the wear facet on each specimen was calculated and statistical analysis was accomplished (ANOVA and Tukey's test).
Volume loss (mm3) was as follows: F2000, 0.027 +/- 0.002; Hytac, 0.007 +/- 0.023; Elan, 0.054 +/- 0.013; Compoglass F, 0.135 +/- 0.006; Dyract AP, 0.135 +/- 0.023; Dyract, 0.185 +/- 0.032. Maximum depth of the wear facets (microm) was as follows: F2000, 112.2 +/- 10.2; Hytac, 132.8 +/- 9.3; Elan, 144.3 +/- 23. 1; Compoglass F, 168.3 +/- 13.0; Dyract AP, 194.0 +/- 19.7; Dyract, 220.6 +/- 15.8. There was not a difference (P > 0.05) in volumetric loss between F2000 and Hytac or between Hytac and Elan. The volume loss and maximum depth of the wear facets of F2000, Hytac and Elan was significantly less (P< 0.05) than Compoglass F, Dyract AP and Dyract The results of this study indicate that there are significant differences in the in vitro wear rates of compomer materials.
测定并比较六种复合体修复材料的局部磨损情况。
使用定制夹具制备10个Dyract、Dyract AP、F2000、Compoglass F、Elan和Hytac样本，并进行抛光处理。使用MTS三维表面轮廓仪生成测试前的表面轮廓，然后将样本在配备锥形触针尖端的Leinfelder磨损试验机中进行400,000次循环，以模拟局部磨损。生成测试后的轮廓，并使用AnSur三维软件对测试前后的轮廓进行拟合和分析。计算每个样本的总体积损失和磨损小平面的深度，并进行统计分析（方差分析和Tukey检验）。
体积损失（mm³）如下：F2000，0.027±0.002；Hytac，0.007±0.023；Elan，0.054±0.013；Compoglass F，0.135±0.006；Dyract AP，0.135±0.023；Dyract，0.185±0.032。磨损小平面的最大深度（μm）如下：F2000，112.2±10.2；Hytac，132.8±9.3；Elan，144.3±23.1；Compoglass F，168.3±13.0；Dyract AP，194.0±19.7；Dyract，220.6±15.8。F2000与Hytac之间或Hytac与Elan之间的体积损失无差异（P>0.05）。F2000、Hytac和Elan的体积损失和磨损小平面的最大深度明显小于Compoglass F、Dyract AP和Dyract（P<0.05）。本研究结果表明，复合体材料的体外磨损率存在显著差异。
