Department of Orthopaedic Surgery, Breach Candy Hospital, 7Mumbai, India.
J Arthroplasty. 2011 Sep;26(6):919-25. doi: 10.1016/j.arth.2011.03.008. Epub 2011 Apr 16.
One hundred twenty-two consecutive minimally invasive Oxford phase 3 medial unicompartmental knee arthroplasties in 109 patients were evaluated for postoperative limb alignment and the influence of factors such as preoperative limb alignment, age, body mass index, sex, insert thickness, and surgeon's experience. The mean mechanical preoperative hip-knee-ankle (HKA) angle of 172.2° ± 3.1° improved to 177.1° ± 2.9° postoperatively. In 75% of the limbs, the HKA angle was restored to within an acceptable alignment of 177° ± 3°, 14% of the limbs were in excessive varus (<174°), and 11% were in valgus (>180°). Only preoperative HKA angle was predictive of postoperative HKA angle. Although most of the limbs had acceptable limb alignment after unicompartmental knee arthroplasty, limbs with more severe preoperative varus deformity had a tendency to remain in excessive varus, and limbs with lesser preoperative varus deformity had a greater tendency to go into valgus postoperatively.
109 例患者中的 102 例行微创 Oxford Ⅲ期单髁膝关节置换术，术后评估下肢对线情况及术前下肢对线、年龄、体重指数、性别、衬垫厚度、术者经验等因素的影响。术前机械性髋-膝-踝（HKA）角平均为 172.2°±3.1°，术后改善至 177.1°±2.9°。75%的下肢 HKA 角恢复到可接受的 177°±3°范围内，14%的下肢呈过度内翻（<174°），11%呈外翻（>180°）。只有术前 HKA 角可预测术后 HKA 角。尽管大多数下肢在单髁膝关节置换术后对线良好，但术前存在严重内翻畸形的下肢有保持过度内翻的趋势，而术前内翻畸形较轻的下肢术后有更大的外翻趋势。
