天然牙及几种牙科修复材料的摩擦磨损性能比较研究

在改进的微动摩擦磨损试验台上，模拟人体牙齿摩擦副，考察了天然牙以及牙科用高分子、金属和陶瓷修复材料与GCr15钢对摩的摩擦磨损性能，结果表明：天然牙的摩擦学性能优良；拜尔牙、热固塑料、铜基合金、钛及钛合金是较为理想的牙科修复材料；尤其是钛及钛合金，不但生物相容性优异，而且与天然牙摩擦学性能匹配，是最具有发展前景的牙科修复材料。

Comparative Study of the Friction and Wear Behavior of Natural Tooth and Several Dental Prosthetic Materials

The friction and wear behaviour of natural living tooth and several dental prosthetic materials made of polymer, metal, and ceramics in sliding against SAE52100 steel was investigated on a modified fretting friction and wear test rig. The worn surface morphologies of the living tooth and several dental prosthetic materials were observed with an optical microscope and a scanning electron microscope. The results show that natural tooth records a low friction coefficient and a small wear scar depth in sliding against the steel ball. The specimens made from Bayer tooth, thermosetting plastic, copper base alloy, titanium and its alloy have relatively good wear resistance as well and are thus idea prosthetic materials. Especially, titanium and its alloy are prospective dental prosthetic materials because of the desirable bio compatibility and similar tribological behaviour as the natural tooth.