Nagao N, Tachibana T, Mizuno K
Department of Orthopaedic Surgery, Nakacho Red Cross Hospital, Hyogo, Japan.
Int Orthop. 1998;22(5):282-7. doi: 10.1007/s002640050261.
The angle of rotation of the knee joint during weight-bearing in osteoarthritic knees has not been fully determined. The authors aimed to examine the nature and extent of rotation during weight-bearing by means of ultrasonic investigation. There was a highly significant correlation between the rotational angle measured by ultrasound and that determined by CT. The dynamic rotatory movement during weight-bearing was measured in 107 osteoarthritic and 40 control knees. At 20 degrees of flexion the internal rotation of the early grade I osteoarthritic knees (-1.6 degrees) was significantly less than that of the control knees (-4.8 degrees, P = 0.004). This abnormality was the initial pathological rotational change in osteoarthritis of the knee joint. The external rotation at maximal extension and the rotation of the screw-home movement proportionately decreased with progression of medial compartment osteoarthritis. By virtue of these observations we have clarified the dynamic rotatory movement in osteoarthritic knees during weight-bearing.
骨关节炎膝关节在负重时的旋转角度尚未完全确定。作者旨在通过超声检查来研究负重时旋转的性质和程度。超声测量的旋转角度与CT测定的角度之间存在高度显著的相关性。对107例骨关节炎膝关节和40例对照膝关节进行了负重时的动态旋转运动测量。在屈膝20度时，早期I级骨关节炎膝关节的内旋（-1.6度）明显小于对照膝关节（-4.8度，P = 0.004）。这种异常是膝关节骨关节炎最初的病理性旋转变化。随着内侧间室骨关节炎的进展，最大伸展时的外旋和归位运动的旋转相应减少。基于这些观察结果，我们阐明了骨关节炎膝关节在负重时的动态旋转运动。
