Combined wear test of restorative dental materials

2003年研制了一套模拟临床条件的牙体修复材料磨损试验系统，在同一个试件上交替进行牙刷磨损和咬合磨损试验，研究了材料（陶瓷和钢）和拮抗体（平、圆）形态对树脂基复合材料磨损的影响。在复合磨损试验中，陶瓷对抗体的磨损量大于钢对抗体。当牙刷磨损与咬合磨损复合作用时，圆形陶瓷对抗体导致树脂复合体的体积损失更大。在复合磨损中，对抗体的材料和结构均影响树脂复合材料的最大磨损深度。2004年，研究了咬合力和刷牙力对树脂复合材料复合磨损的影响。在联合磨损试验中，较高的咬合力和刷牙力均导致显著更大的磨损体积和最大磨损深度。2005年，研究了含纤维或细磨粒的介质对树脂基复合材料复合磨损的影响。当介质中加入纤维素时，树脂复合材料的磨损体积和最大磨损深度显著减小。介质中的细磨粒使树脂基复合材料的磨损体积和最大磨损深度显著增大。介质中纤维和细磨粒对树脂基复合材料磨损体积和最大磨损深度的影响不同。

The combined wear testing system, which carries out toothbrush wear and occlusal wear alternately on one specimen, was developed to study the wear behavior of dental restorative materials in simulated clinical conditions.In 2003, the effects of material (ceramic and steel) and configuration (flat and round) of antagonist on the combined wear of resin composites were investigated. The worn volume by the ceramic antagonist was greater than that by the steel antagonist in the combined wear test. The round ceramic antagonist induces more volume loss of resin composite when the toothbrush wear was combined with the occlusal wear. Both material and configuration of an antagonist affected the maximum worn depth of resin composites in the combined wear.In 2004, the effects of occlusal and brushing forces on the combined wear of resin composites were investigated. In the combined wear test, both higher occlusal and brushing forces resulted in significantly greater worn volume and the maximum worn depth. The tested four composites showed different wear behavior under different occlusal forces and brushing forces.In 2005, the effect of medium, which contains fibers or fine abrasive particles, on the combined wear of resin composites was investigated. When cellulose was added in the medium, the worn volume and the maximum worn depth of resin composites were significantly decreased. The fine abrasive particle in the medium produced significantly greater worn volume and maximum worn depth of resin composites. Effect of fiber and fine abrasive in the medium on worn volume and maximum worn depth were different among resin composites.