移动平台单髁置换术治疗膝关节内侧间室骨性关节炎

目的评估移动平台单髁置换术治疗膝关节内侧间室骨性关节炎的临床疗效。方法回顾性分析自2011-10—2013—01使用Oxford Phase Ⅲ移动平台单髁系统治疗膝关节内侧间室骨性关节炎47例（50膝）．观察术后下肢力线、膝关节活动度和并发症，采用Oxford及AKS评分对手术前后膝关节功能进行评估。结果47例均获得随访，平均随访13（6～21）个月。未发生假体周围感染、假体周围骨折、下肢深静脉血栓、医源性神经血管损伤。2例出现内衬脱位，行翻修术，无感染。术后测量下肢力线平均内翻1．2°。Oxford评分：术前平均（24．6±1．9）分，术后平均（41．3±3．5）分。AKS疼痛评分：术前平均（50．5±3．9）分，术后平均（86．9±4．9）分。AKS功能评分：术前平均（47．0±6．6）分，术后平均（86．4±9．4）分。术后Oxford、AKS评分较术前明显提高，差异均有统计学意义（P〈0．05）。术后无伸直受限，最大屈曲度平均（121．0±6．7）°。结论移动平台单髁置换术治疗膝关节内侧间室骨性关节炎短期效果良好，但中远期疗效需进一步随访。

Short-term results of meulscal-bearing unicompartmental knee arthroplasty for medial compartment knee osteoarthritis

Objective To evaluate short-term results of the meniscal-bearing unicompartmental knee arthroplasty （UKA） in patients with medial compartment knee osteoarthritis. Methods From Oct. 2011 to Jan. 2013, UKA was carried out on 47 patients who underwent UKA for isolated medial compartment knee osteoarthritis. Patients underwent UKA with the Oxford phase 3 cemented meniscal-bearing unicondylar prosthesis using minimally invasive surgery. The results were assessed preoperatively and at final controls according to the Oxford rating system, American Knee Society clinical and functional rating system. Postoperative radiographic evaluations and range of motion were also observed. Results The mean follow-up period was 13 months（range 6 to 21 months）. No patient was lost to follow-up. Two patients underwent revision surgery and change of the inlay due to bearing dislocation. Complications such as infection, pulmonary embolism, deep venous thrombosis, or neurovascular injury were not observed. The mean preoperative and postoperative American knee scores were （50.5±3.9） and （86.9±4.9）, and the mean functional scores were （47.0±6.6） and （86.4±9.4）, respectively（P 〈0.05）. The mean preoperative and postoperative Oxford knee scores were （24.6±1.9） and （41.3±3.5）, respectively（P 〈0.05）. Postoperative radiographic measurements showed that the position of the femoral components was within acceptable ranges in all the patients with a mean of 1.2° valgus. The mean flexion postoperative was （121.0±6.7）degrees. Conclusion The short-term results of the meniscal-bearing unicompartmental knee prosthesis are excellent or good in the treatment of medial compartment knee osteoarthritis.