动力学代偿现象：ACL重建术后对侧膝关节过载及外侧关节外肌腱固定的调节作用
简介
该前瞻性队列研究纳入216名运动员，术后3、6、12个月通过双力台及表面肌电评估单腿跳跃和变向动作，计算动力学代偿指数（KCI）。结果显示，加做LET的患者KCI显著更低（p<0.01），对侧ACL损伤率较单纯骨-髌腱-骨重建组明显下降（5.5% vs 12.9%），且KCI≥60预测对侧损伤的AUC为0.81。提示LET可减轻对侧膝关节过载，KCI有望补充…
英文摘要
BACKGROUND: Contralateral anterior cruciate ligament (ACL) injury remains one of the most frequent and devastating complications after primary reconstruction, occurring in up to 15% of athletes. Traditional return-to-sport (RTS) criteria fail to detect subtle kinetic and neuromuscular asymmetries that persist despite restoration of ligament continuity. These compensatory load-shifting mechanisms-collectively described as the Kinetic Compensation Phenomenon-may be quantifiable through a composite biomechanical index. METHODS: Two hundred sixteen competitive athletes underwent standardized single-leg hop and change-of-direction testing on dual force platforms synchronized with surface electromyography at 3, 6, and 12 months postoperatively. KCI was computed as the mean z-score of ΔVGRF, ΔLR, ΔTTS, and ΔCCI, scaled to a T-distribution (mean = 50, SD = 10). Predictive validity for contralateral ACL injury at 24 months was assessed using ROC and Cox proportional-hazard models. RESULTS: The LET group demonstrated significantly lower KCI values across follow-up (p < 0.01) and a lower rate of contralateral ACL injury than the isolated BTB group (5.5% vs 12.9%; adjusted HR, 0.39; 95% CI, 0.17-0.91). KCI ≥60 predicted contralateral injury with AUC = 0.81. CONCLUSION: LET was associated with lower contralateral kinetic overload and more symmetric biomechanical profiles during functional testing. The KCI represents a promising composite index of functional readiness that may complement conventional RTS criteria; however, external validation is required before routine clinical implementation. Composite index of functional readiness that may complement conventional RTS criteria. LEVEL OF EVIDENCE: II.