The Efficacy Of Unicompartment Knee Arthroplasty For Knee Joint Disease

Objective To report the short-term results of unicompartment knee arthroplasty(UKA), and to detail possible factors of success including indications and surgical techniques.Methods Between February2011and July2012,25patients (26knees) were chosen that had been performed medial UKA. There were9males (9knees) and16females (17knees) with an average age of63.3years (range,43-82years). The patients’ mean weight was60.7kg (range,44-78kg). The25patients studied had an average follow-up period of17.8months (range,8-25months). All the patients had a complete radiological evaluation and the preoperative diagnosis was osteoarthritis. Patient evaluation consisted of femorotibial angle (FTA), range of motion and American knee society knee score(KSS knee score criterion) before surgery and at the last follow-up.Results The mean FTA improved from a preoperative mean of181.3degrees to176.1degrees postoperatively on the UKA side. The mean range of motion improved from106.3degrees to123.1degrees. The average American Knee Society knee score varied from61.8before surgery to94.5and the function score from43.8to83.5.There were significant difference of FTA, range of motion and KSS knee score between pre-operation and post-operation.Conclusions The short-term result of UKA is satisfactory. Minimally invasive UKA can make recovery rapid with a short hospital stay. Surgeons are broadening their indications for this procedure. The procedure remains technically demanding and unforgiving.