种植义齿固定螺丝服役前后的扫描电镜观察  

Observations on before and after employ of screw of implant denture with SEM

作　　者：宋应亮[1,2] 徐君伍[1,2] 马轩祥[1,2] 何永富 安运铮[1,2] 孙占波 

机构地区：[1]西安第四军医大学口腔医学院 [2]西安理工大学材料工程系

出　　处：《中华口腔医学杂志》1997年第2期108-110,共3页Chinese Journal of Stomatology

摘　　要：为了探讨种植义齿固定螺丝服役中磨损的原因，对ＭＤＩＣ（ＭｉｌｉｔａｒｙＤｅｎｔａｌＩｍｐｌａｎｔＣｅｎ－ｔｕｒｅ，全军牙科种植中心）种植义齿固定螺丝服役前后的表面改变，进行了扫描电子显微镜观察。结果发现，３６枚服役后的固定螺丝均有明显的缝隙腐蚀。作者认为，缝隙腐蚀和摩擦受力是螺丝受磨损的主要原因，缝隙腐蚀的存在加快了磨损的过程。建议选用机械性能与耐腐蚀性能优于纯钛的钛合金作种植体材料，采取防缝隙腐蚀措施，以提高固定螺丝耐磨损性能，延长种植义齿的使用寿命。The loss of screw is one of the clinic complication in MDIC implant denture cases. The purpose of this study is to find the cause of loss of screw. The authors has studied MDIC implant denture with SEM before and after employ of the screw and found that the causes of screw loss were crevice corrosion and friction pressure. Crevice corrosion may promote the loss of screw. Base the above condition, it is necessary to select Ti alloy screw and associat with anticorrosive measure in MDIC implant denture construction.

关 键 词：牙种植 固定螺丝 缝隙腐蚀 义齿 种植 

分 类 号：R783.6[医药卫生—口腔医学]