Combined wear test of restorative dental materials

为了研究牙体修复材料在模拟临床条件下的磨损行为，研制了牙刷磨损与咬合磨损交替进行的组合磨损试验系统。2003年，研究了抗菌剂的材料（陶瓷和钢）和结构（平面和圆形）对树脂复合材料复合磨损的影响。复合磨损试验中，陶瓷抗菌剂的磨损体积大于钢抗菌剂。圆形陶瓷拮抗剂在牙刷磨损与咬合磨损联合使用时，树脂复合材料的体积损失更大。复合磨损中，拮抗剂的材料和配置对树脂复合材料的最大磨损深度都有影响。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，较高的咬合力和刷齿力均显著增大磨损体积和最大磨损深度。四种复合材料在不同的咬合力和刷齿力作用下表现出不同的磨损性能。2005年，研究了含有纤维或细磨粒的介质对树脂复合材料复合磨损的影响。当介质中添加纤维素时，树脂复合材料的磨损体积和最大磨损深度显著降低。介质中细小的磨粒对树脂复合材料产生较大的磨损体积和最大磨损深度。不同树脂复合材料中纤维和细碎磨料对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.