Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba City, Chiba, Japan.
J Arthroplasty. 2012 Feb;27(2):260-5. doi: 10.1016/j.arth.2011.04.025. Epub 2011 Jul 12.
Thirty-eight patients diagnosed with osteoarthritis underwent 41 cruciate-retaining total knee arthroplasties. In varus and valgus tests at flexion, subjects were seated on a table at 80° of knee flexion; 50 N was applied perpendicular to the lower leg. The factors affecting the postoperative flexion angle were investigated in a multiregression analysis. The mean joint angles of the flexion-valgus and flexion-varus tests were 3.4° ± 1.4° and 6.2° ± 2.5°, respectively. The flexion-varus angle was correlated with the postoperative flexion angle (P < .01). The mean postoperative flexion angles were 110.8° ± 9.6° and 118.1° ± 8.0° in the groups with the flexion-varus angle of 6° or less and more than 6°, respectively (P = .02). Slack lateral laxity in flexion had a significant effect during knee flexion in cruciate-retaining total knee arthroplasty.
38 例被诊断为骨关节炎的患者接受了 41 例保留交叉韧带的全膝关节置换术。在膝关节屈曲时的内翻和外翻测试中，受检者坐在一张桌子上，膝关节屈曲 80°；50N 的力垂直于小腿施加。在多元回归分析中研究了影响术后屈曲角度的因素。膝关节屈伸和内外翻试验的平均关节角度分别为 3.4°±1.4°和 6.2°±2.5°。屈伸角与术后屈曲角呈正相关（P<.01）。在屈伸角为 6°或以下和大于 6°的组中，术后平均屈曲角分别为 110.8°±9.6°和 118.1°±8.0°（P=0.02）。在保留交叉韧带的全膝关节置换术中，膝关节屈曲时的外侧松弛度在膝关节屈曲时有显著影响。
