Kawai K, Leinfelder K F
Department of Operative Dentistry, Osaka University Faculty of Dentistry, Osaka, Japan.
Dent Mater. 1995 Jul;11(4):246-51. doi: 10.1016/0109-5641(95)80057-3.
Posterior composites undergo generalized (CFA) as well as localized (OCA) wear. The latter is caused by the contact of an antagonist cusp on the surface of the restoration. The purpose of this paper was to create OCA wear by means of a three-bodied wear device and also to develop a simple but reliable method for calculating loss of material in occlusal contact areas.
After repeated cycles of loading, the OCA wear loss was measured with a profilometer, and the worn surfaces were observed through scanning electron micrography.
The results of this study have demonstrated significant differences in wear values among materials. These findings suggest that the difference in wear characteristics is derived from the mechanism by which the filler particle is bonded to the resin matrix.
If OCA wear is of sufficient magnitude, it can cause appreciable changes in functional occlusion. Thus, knowing the OCA wear resistance of various composites is a prerequisite for developing a new composite with improved longevity and better clinical performance.
后牙复合树脂会发生普遍磨损（CFA）以及局部磨损（OCA）。后者是由修复体表面的对抗牙尖接触引起的。本文的目的是通过三体磨损装置产生OCA磨损，并开发一种简单但可靠的方法来计算咬合接触区域的材料损失。
经过反复加载循环后，用轮廓仪测量OCA磨损损失，并通过扫描电子显微镜观察磨损表面。
本研究结果表明不同材料的磨损值存在显著差异。这些发现表明，磨损特性的差异源于填料颗粒与树脂基体的结合机制。
如果OCA磨损程度足够大，可能会导致功能咬合发生明显变化。因此，了解各种复合材料的OCA耐磨性是开发具有更长使用寿命和更好临床性能的新型复合材料的先决条件。
