Castle T H, Noyes F R, Grood E S
Cincinnati Sportsmedicine and Orthopaedic Center, Ohio.
Clin Orthop Relat Res. 1992 Nov(284):193-202.
Ten subjects with unilateral posterior cruciate ligament-deficient knees were studied, comparing the knee mechanics of the affected knee with the mechanics of the opposite normal knee. The static squat test was used to determine knee forces and moments through measurements made on roentgenograms. Statistically significant increases occurred in posterior translation of the tibia in all knees at high knee flexion angles, but not uniformly at low knee flexion angles. The results suggest that posterior tibial subluxation occurs in vivo during certain activities of daily living. Posterior tibial subluxation occurred in positions of knee flexion near 70 degrees, establishing a new equilibrium for the system where tibiofemoral joint compression force (approximately four times one-half body weight) remained an order of magnitude greater than tibiofemoral shear forces (approximately 10% of one-half body weight).
对10名单侧后交叉韧带损伤膝关节的受试者进行了研究，将患侧膝关节的力学情况与对侧正常膝关节的力学情况进行比较。通过对X线片进行测量，采用静态蹲起试验来确定膝关节的力和力矩。在高屈膝角度时，所有膝关节胫骨后移均出现统计学显著增加，但在低屈膝角度时并非均如此。结果表明，在日常生活的某些活动中，胫骨后向半脱位在体内会发生。胫骨后向半脱位发生在屈膝接近70度的位置，为该系统建立了一个新的平衡，此时胫股关节压缩力（约为体重一半的四倍）仍比胫股剪切力（约为体重一半的10%）大一个数量级。
