Stiehl J B, Komistek R D, Dennis D A, Paxson R D, Hoff W A
Department of Orthopaedic Surgery, Medical College of Wisconsin, Milwaukee 53211, USA.
J Bone Joint Surg Br. 1995 Nov;77(6):884-9.
We used fluoroscopy to study the kinematics of the knee in 47 patients with total knee arthroplasty (TKA) and four control subjects with normal knees while performing a single-leg deep-knee bend. The videos were analysed using still photographs taken at 5 degrees increments of flexion. Femorotibial contact points, patellar ligament rotation, and patellar rotation were calculated from each image. Maximum weight-bearing flexion was determined for each knee. Compared with the control group, posterior-cruciate-retaining TKA did not reproduce normal knee kinematics in any case, but showed a starting point posterior to the tibial midline which translated anteriorly with flexion. The curves from successive knee bends could not be consistently reproduced. Under weight-bearing conditions, the maximum flexion for any PCR TKA was 98 degrees and several patients could not flex beyond 70 degrees.
我们利用荧光镜检查研究了47例全膝关节置换术（TKA）患者及4例膝关节正常的对照受试者在进行单腿深蹲时膝关节的运动学情况。使用以5度屈曲增量拍摄的静态照片对视频进行分析。从每张图像中计算股骨胫骨接触点、髌韧带旋转和髌骨旋转。确定每个膝关节的最大负重屈曲度。与对照组相比，保留后交叉韧带的全膝关节置换术在任何情况下均未重现正常膝关节运动学情况，而是显示出一个起始点位于胫骨中线后方，随屈曲向前移位。连续屈膝的曲线无法持续重现。在负重条件下，任何保留后交叉韧带的全膝关节置换术的最大屈曲度为98度，且有几名患者无法屈曲超过70度。
