Miller Emily J, Pagnano Mark W, Kaufman Kenton R
Department of Orthopedic Surgery, Mayo Clinic Rochester, Motion Analysis Laboratory, 200 First Street SW, Charlton North L-110, Rochester, Minnesota, 55905.
J Orthop Res. 2014 Aug;32(8):1068-74. doi: 10.1002/jor.22644. Epub 2014 May 12.
For total knee arthroplasty (TKA), neutral mechanical alignment produces balanced static knee loading. Dynamically, knee loading is affected by more than limb static alignment. We compared static and dynamic knee loading following TKA. Fifteen TKA patients were evaluated pre-operatively and 2 months and 2 years post-operatively. Tibiofemoral angles and medial tibial plateau loading were calculated. Pre-operatively, static medial load was greater for varus than valgus knees. Post-operatively, no relationship existed between tibiofemoral angle and static medial plateau load. Pre-operatively and post-operatively, dynamic medial load was not dependent on tibiofemoral angle. While all patients achieved equal static plateau load distributions at 2 years, only 47% had dynamic medial load distributions of 50 ± 10%. Static tibiofemoral alignment alone does not predict dynamic tibial loading.
对于全膝关节置换术（TKA），中立机械对线可产生平衡的静态膝关节负荷。从动态角度来看，膝关节负荷受肢体静态对线以外的因素影响。我们比较了TKA术后的静态和动态膝关节负荷。对15例TKA患者在术前、术后2个月和2年进行了评估。计算了胫股角和胫骨内侧平台负荷。术前，内翻膝的静态内侧负荷大于外翻膝。术后，胫股角与静态内侧平台负荷之间不存在相关性。术前和术后，动态内侧负荷均不依赖于胫股角。虽然所有患者在2年时均实现了相等的静态平台负荷分布，但只有47%的患者动态内侧负荷分布为50±10%。仅静态胫股对线并不能预测动态胫骨负荷。
