Knee arthroplasty using rotating hinged knee systems for complex knee disease / 中国组织工程研究

ABSTRACT

OBJECTIVE: To explore the clinical results of rotating hinged knee systems in the treatment of complex knee diseases. METHODS: A total of 18 patients (11 males and 7 females, aged 58.7 years, ranging 34-66 years) with complex knee diseases were selected from Second Xiangya Hospital of Central South University, who underwent 20 primary knee arthroplasties (11 left and 9 right knees) using rotating hinged prosthesis from June 2003 to May 2008. These cases included 8 rheumatoid arthritis and 10 osteoarthritis, and presented 20?-30? varus or valgus deformity or 25?-40? fixed flexion deformity. Two patients underwent bilateral knee arthroplasty. Preoperatively bone loss and deformities in all cases was evaluated by AORI and X-ray. Postoperatively the clinical results were evaluated by the HSS knee rating score system. RESULTS: Knee arthroplasty was performed in all patients successfully and unilateral operative time was 95-147 minutes (average 129 minutes). The patients were followed up form 11 months to 6 years (average 4.2 years). All the knee pain was released and the deformities were corrected. The range of joint movements was up to 100?-136?. The patients could walk without assistance of walking stick. No light or deep infection, prosthesis subsidence, dislocation or fracture resorption was found. The average HSS score was 86 (78-95 scores) post-operation while 42 (25-56 scores) pre-operation. Excellent results were received in 11 cases, good in 6 cases. The rate of excellent or good was 94%. CONCLUSION: The knee arthroplasty using rotating hinged knee systems is an effective method to treat complex knee diseases such as severe extroversion or varus. It can release the knee pain and improve joint function and the quality of life.