摘要胫股关节不稳定是导致全膝关节置换术（total knee arthroplasty,TKA）术后膝关节功能障碍的常见原因之一。目前国际常用的膝关节协会评分（Knee Society Scoring,KSS）系统将TKA术后明确的胫股关节不稳定界定为膝关节冠状位松弛超过15°及前后方向位移超过10mm.
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