不同表面处理方法对氧化锆与天然牙磨损性能的影响  

Friction and Wear Behavior of Natural Tooth and Zirconia with Different Surface Treatment

作　　者：刘亦洪[1] 王琳[1] 司文捷[2] 陶永青[1] 邱岩[3] 包亦望[3] 

机构地区：[1]北京大学口腔医学院,北京100081 [2]清华大学材料科学与工程系,北京100084 [3]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100001

出　　处：《稀有金属材料与工程》2011年第S1期143-146,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50872003;50772103);北京市自然科学基金项目(2082026;2102047);国家"973"计划(2009CB623103);"863"项目(2007AA03Z526)

摘　　要：在微摩擦磨损试验机上,模拟口腔力学和化学环境,以天然牙为研究对象,以不同表面处理的氧化锆为摩擦副,考察天然牙釉质与不同表面处理氧化锆对磨的摩擦磨损性能。结果表明:氧化锆表面抛光可以明显减小牙釉质与氧化锆对磨的摩擦系数,正确的氧化锆抛光方法可以改善天然牙与氧化锆修复体对磨时牙釉质的磨损。常规表面上釉方法处理后的氧化锆在应力作用下表面釉层破碎,加重牙釉质的磨损。与抛光氧化锆对磨,牙釉质的磨损类型主要是疲劳磨损,与未抛光氧化锆对磨,牙釉质的磨损主要表现为磨粒磨损。The friction and wear behaviors of natural living tooth in sliding against zirconia were investigated on a fretting friction and wear testing. The surface of the zirconia antagonists were treated by different methods according to the clinical treatment of zirconia restorations including glazing, rubber wheel burnish and silicon carbide bur grinding. The enamel was exposed and polished after the living teeth embedded. The friction coefficients were recorded with cycles. The worn surface morphologies of tooth enamel were observed with a scanning electron microscope. The results show that enamel recorded low friction coefficients and small wear scar widths in sliding against the polished zirconia balls, whereas much higher friction coefficients and larger wear scar widths in sliding against rough zirconia. The correct polishing methods are needed when the zirconia restorations using in clinic treatment, such as polished by rubber wheels containing different granularity silicon carbide from large to small particle size step by step until 20-20 μm silicon carbide. The enamel presented the highest friction coefficient in sliding against the porcelain glazing ziconia ball by general clinical method, due to the porcelain enamel cracked under stress. The main enamel wear style was fatigue wear in sliding against polished zirconia, whereas abrasive wear in sliding against rough zirconia.

关 键 词：牙釉质 氧化锆 摩擦磨损性能 

分 类 号：R783.1[医药卫生—口腔医学]