不同口腔修复材料与天然牙耐磨性能的比较

目的：通过体外模拟实验对几种口腔修复材料与天然牙釉质的磨耗性能进行对比研究并探讨其机制.方法：（1）将钴铬合金,纯钛,氧化锆陶瓷,Ceramage聚合瓷制成符合规格的试件.（2）将上颌第一前磨牙磨改,作为对照组.（3）将滑石瓷制做圆盘状,作为与试件及天然牙对磨的材料.（4）所有实验均在人工唾液环境中加载测试.（5）SPSS17.0软件进行统计学处理,对磨耗后的试件进行磨痕形貌的观察.结果：（1）纯钛的磨耗量与牙釉质最接近.钴铬合金与氧化锆陶瓷无统计学意义（P＞0.05）,其余各组之间均有统计学意义（P＞0.05）.磨耗后质量损失量的大小顺序为纯钛＞牙釉质＞ Ceramage聚合瓷＞氧化锆陶瓷＞钴铬合金.（2）钴铬合金：磨粒磨损,同时伴有粘着磨损.纯钛：以粘着磨耗为主,伴有磨粒磨耗.氧化锆陶瓷：磨粒磨损.Ceramage聚合瓷：主要是磨粒磨损和粘着磨损,伴有疲劳磨损.天然牙：粘着磨损和磨粒磨损.结论：（1）纯钛的耐磨性低于牙釉质但与牙釉质最为相近,是一种良好的修复材料.（2）钴铬合金与氧化锆陶瓷的耐磨性能接近,均可对天然牙釉质造成过度磨耗.（3）修复材料的耐磨性能受其微观结构的影响.

Comparison of wear resistance between different dental prosthetic materials and natural tooth

Objective： To compare the wear resistance between different dental prosthetic materials and natural tooth Methods： （1） Rectangular specimens of cobalt chromium alloys, titanium, zirconium oxide ceramic, Ceramage polymer ce- ramic were fabricated. （2） The human maxillary first premolars were served as a control group. （3） Talc porcelain was made in the disc-shaped as the grinding material. （4） All load testing were performed and in artificial saliva environment. （5） Sta- tistical analysis of mass loss of the specimen were performed by SPSS17.0 statistical software and wear scar morphology were observed. Results： （1） The amount of wear of pure titanium and enamel was closest. Wear amotmt between all groups were statistically different （P 〈0.05）, except between cobalt-chromium alloy and zirconium ceramic （P〉 0. 05）. The order of the amount of mass loss was titanium 〉 enamel 〉 Ceramage polymer ceramic〉 zirconium ceramic〉 cobalt chromium alloy. （2） The wear mode of cobalt-chromium alloy was abrasive wear combined with adhesive wear. Titanium was proved to be adhesive wear combined with abrasive wear. Zirconium ceramics showed to be abrasive wear. Ceramage polymer ceramic was proved to be abrasive wear and adhesive wear, combined with fatigue wear. Natural teeth was adhesive and abrasive wear. Conclusions： （1） The abrasion resistance of titanium was less than enamel but was the most similar to enamel, which was a favorable dental prosthetic material. （2） The abrasion resistance of Cobalt-chromium alloy and zirconium ceramic was close, which could cause excessive wear of natural enamel. （3） The wear resistance of the dental prosthetic material was influenced by its microscopic structure.