Yagi T
Department of Orthopaedic Surgery, Teine-Keijinkai Hospital, Sapporo, Japan.
Clin Orthop Relat Res. 1994 May(302):52-6.
Computed tomography (CT) measurements of torsion of the lower extremities were evaluated in 85 knees of 68 patients with medial-type osteoarthrotic knees and in 24 normal knees of 13 adults. In addition, segmental tibial torsion and CT density of the third lumbar vertebra, reflecting general osteoporosis, were measured. Although there were no differences in the degrees of femoral torsion or knee joint rotation, external tibial torsion in the 68 patients was observed to have a mean value of 11.3 degrees, significantly smaller than the 23.5 degrees observed in the 13 normal adults (p < 0.01). Lateral torsion was 14.1 degrees in mild, 11.9 degrees in moderate, and 7.5 degrees in severe stages of osteoarthrosis. The rate of decrease in lateral tibial torsion was 59.6% in the proximal tibia, 4.2% in the tibial shaft, and 36.2% in the distal tibia. The decrease of lateral tibial torsion was correlated with decrease of CT density of the third lumbar vertebra. There is a correlation between reduction of lateral torsion with the radiographic stage of osteoarthrosis of the knee and general osteoporosity.
对68例患有内侧型骨关节炎膝关节患者的85个膝关节以及13名成年人的24个正常膝关节进行了下肢扭转的计算机断层扫描（CT）测量。此外，还测量了反映全身骨质疏松情况的第三腰椎的节段性胫骨扭转和CT密度。尽管股骨扭转程度或膝关节旋转角度没有差异，但观察到68例患者的胫骨外扭转平均值为11.3度，明显小于13名正常成年人中观察到的23.5度（p<0.01）。在骨关节炎的轻度阶段，外侧扭转角度为14.1度，中度阶段为11.9度，重度阶段为7.5度。胫骨近端外侧扭转的减少率为59.6%，胫骨干为4.2%，胫骨远端为36.2%。胫骨外侧扭转的减少与第三腰椎CT密度的降低相关。外侧扭转的减少与膝关节骨关节炎的影像学分期和全身骨质疏松之间存在相关性。
