METHODS: This is a retrospective study of 149 patients with symptomatic varus and valgus knee OA who intend to take total knee arthroplasty (TKA) between January and October 2013. A protocol for the measurement of knee-ankle alignment and angles on full-length standing anteroposterior radiographs of the lower extremity was outlined in detail with step-by-step instructions. Two observers measured the angles chosen. The Pearson\'s correlation tests were used for the statistical analysis.
RESULTS: Pearson\'s correlation test results for unilateral varus or valgus gonarthrosis showed that the varus or valgus deformity of the knee can influence the tilt angle and tibiotalar angle of the ankle in operative side signficantly(p<0.05), and the tilt angle of the ankle can also be affected in nonoperative side (p<0.05). Moreover, the tilt angle of the bilateral ankle can be simultaneously affected in bilateral varus gonarthrosis (p<0.05).
CONCLUSIONS: These findings suggest that the varus and valgus deformity of the knee can induce the tilt of the ankle and influence the ankle alignment, which may further accelerate the degeneration of the ankle. Moreover, the knee alignment in the nonoperative side can also result in the change of ankle alignment at the same time.
方法:这是一项回顾性研究,对2013年1月至10月间149例有症状的膝内翻和外翻OA患者进行了回顾性研究。详细概述了在下肢全长站立前后位X射线照片上测量膝踝对准和角度的协议,并逐步说明。两名观察者测量了所选择的角度。采用Pearson相关检验进行统计分析。
结果:Pearson对单侧关节内翻或外翻的相关测试结果表明,膝关节内翻或外翻畸形可明显影响手术侧踝关节的倾斜角度和胫骨角度(p<0.05)。非手术侧踝关节的倾斜角度也会受到影响(p<0.05)。此外,双侧踝关节内翻可以同时影响双侧踝关节的倾斜角度(p<0.05)。
结论:这些发现表明,膝关节的内翻和外翻畸形可引起踝关节的倾斜并影响踝关节的对准,这可能会进一步加速脚踝的退化。此外,非手术侧的膝关节对齐也会同时导致踝关节对齐的变化。