To investigate the effectiveness of rotating-platform prosthesis for valgus knee deformity in total knee arthroplasty (TKA).
A retrospective analysis was made on the clinical date of 25 cases (28 knees) of valgus deformity undergoing primary TKA by using Gemini MK II rotating-platform prosthesis. There were 6 males (7 knees) and 19 females (21 knees), aged from 47 to 82 years, with an average age of 64.8 years. The unilateral knee was involved in 22 cases and the bilateral knees in 3 cases. The causes included osteoarthritis in 20 cases (22 knees), rheumatoid arthritis in 4 cases (5 knees), and traumatic arthritis in 1 case (1 knee). The disease duration was 2-22 years (mean, 10.4 years). The main clinical symptoms were arthralgia combined with limited movement. According to the Keblish grade, there were 13 knees of mild deformity, 11 knees of moderate deformity, and 4 knees of severe deformity.
All incisions healed by first intension. No complications of infection, cutaneous necrosis, deep venous thrombosis, and pulmonary embolism occurred. The postoperative follow-up duration was 12-60 months (mean, 25.4 months). Medial instability and palsies of nervus peroneus communis occurred in 1 and 2 cases respectively, and all were cured after symptomatic treatment. No patellar and polysthylene insert dislocation, prosthetic loosening or infection was observed. The Hospital for Special Surgery (HSS) score, femoral tibial angle, maximun flexion and extension angles, knee range of motion, and patellar score were significantly improved at last follow-up when compared with preoperative ones (
探讨采用旋转平台假体行人工全膝关节置换术（total knee arthroplasty，TKA）治疗膝外翻畸形的疗效。.
回顾分析2006年12月-2014年12月采用Gemini MK Ⅱ旋转平台假体行初次TKA的25例（28膝）膝外翻畸形患者临床资料。男6例（7膝），女19例（21膝）；年龄47～82岁，平均64.8岁。单膝22例，双膝3例。病因：骨关节炎20例（22膝），类风湿性关节炎4例（5膝），创伤性关节炎1例（1膝）。病程2～22年，平均10.4年。主要临床症状均为膝关节疼痛伴活动受限。根据Keblish膝外翻畸形分级标准，轻度13膝、中度11膝、重度4膝。.
术后患者切口均Ⅰ期愈合，无感染、皮肤坏死、下肢深静脉血栓形成、肺栓塞等并发症发生。患者均获随访，随访时间12～60个月，平均25.4个月。术后1例出现膝关节内侧不稳症状，2例足背皮肤感觉减退，经对症处理后症状均消失。X线片复查未见髌骨轨迹不良及假体周围感染或松动等并发症。末次随访时美国特种医院（HSS）评分、股胫角、最大伸膝角度、最大屈膝角度、膝关节活动度及髌骨评分均较术前显著改善，差异有统计学意义（
采用旋转平台假体行TKA治疗膝外翻畸形可获得较好疗效，但术中软组织松解平衡要求较高，远期疗效有待进一步观察。.
The rotating-platform prosthesis for valgus deformity can obtain satisfactory effectiveness, but it requires precise soft tissue balancing technology, and the long-term effectiveness remains further observation.