可切削复合树脂材料磨损性能的研究

目的：研究可切削复合树脂材料与天然牙釉质磨损性能的匹配情况。方法在微摩擦磨损实验机上,模拟口腔力学和化学环境,以三种新型的可切削复合树脂材料( Upcera 复合树脂、Lava Ultimate、High-Class)为研究对象,天然牙釉质为对磨物。实验前,用激光共聚焦显微镜测试试件表面粗糙度Sa,实验后,激光共聚焦下观察可切削复合树脂试件的磨斑形貌、测量其磨斑面积及对磨物牙釉质的磨斑宽度,扫描电镜下观察试件磨斑的微观形貌。采用单因素方差分析进行统计学分析。结果牙釉质的磨斑面积和磨斑宽度大于其他三种可切削复合树脂材料(P<0.05)。结论与牙釉质相比,三种可切削复合树脂具有更佳的耐磨性及较低的对磨物磨损。

Friction and wear of dental CAD/CAM composite resin

Objective To evaluate the friction and wear of CAD/CAM composite resin comparing with natural enamel. Methods The surface roughness ( Sa) of three kinds of CAD/CAM composite resins ( Upcera composite resin,Lava Ultimate,High-Class) and the natural enamel were determined by laser scanning confocal microscope. The specimens were tested on a micro friction and wear test apparatus in artificial oral environments, while the natural enamel served as antagonist. The wear morphology of the CAD/CAM composite resins was observed and the wear areas were measured by laser confocal microscope. The enamel wear scar width was measured by laser confocal microscope. Scanning electron microscopy was used to observe the wear surface micro-morphology of CAD/CAM composite resins and enamel. Statistical analysis was performed using one-way analysis of variance ( ANOVA ) . Results The wear areas and wear scar width of enamel were greater than that of the CAD/CAM composite resin materials (P <0. 05). Conclusion The three kinds of CAD/CAM composite resin materials had superior wear resistance and lower antagonistic wear comparing with natural enamel.