假体-骨组织界面微动磨损机理的实验研究

目的 探索骨组织在微动过程中裂纹产生和扩展的原因及过程,弄清假体-骨组织界面微动磨损的机理。方法 用干燥股骨和钛合金构造成微动实验系统进行实验研究。结果 微动区域附近的骨组织均变疏松,纵剖面和横剖面上都存在肉眼可见的明显裂纹。结论 骨组织在微动过程中将发生疲劳破坏,从而造成假体松动。

EXPERIMENTAL STUDY ON FRETTING WEAR IN PROSTHESIS - BONE INTERFACE

Objective To investigate the cause and process of crack generation and propagation in fretting wear of bone and to study the fretting wear mechanism between prostheses and bones. Methods Conducting a fretting wear experiment system with a dried thigh bone and titanium alloy. Results Bone structures in fretting areas become loose and obvious cracks could be found in both longitudinal and cross -sectional planes of the bone. Conclusion Bone structures in fretting wear will induce fatigue failure and this will further cause loosening of prostheses.