Abstract
Purpose
To compare the clinical and radiographic results of unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) in the same patient, and to investigate patient preference and satisfaction.
Materials and Methods
Among the 56 patients who underwent a UKA in one knee and a TKA in the opposite knee between January 2002 and December 2004, 51 patients were followed up. The average follow-up period was 4 years.
Results
The average Knee Society Score (KSS) improved from 53.5 preoperatively to 90.7 at last follow-up in the UKA knee, and from 50.4 to 89.8 in the TKA knee. The mean range of knee motion also improved from 124.7° to 133.2° in the UKA knee, and from 122.5° to 127.1° in the TKA knee. The tibiofemoral angle changed from 0.3° of varus to 5.6° of valgus in the UKA knee, and from 2.4° of varus to 5.8° of valgus in the TKA knee. For patient preference, 23 patients (45%) preferred the UKA knee and 19 patients (37%) preferred the TKA knee. Most patients (42 patients, 82%) reported being 'very satisfied' or 'satisfied' with both knees.
Figures and Tables
Fig. 1
(A, B) The preoperative radiographs of a 71-year-old woman show osteoarthritis of both knees. (C, D) The postoperative radiographs taken after unicompartmental knee arthroplasty (Rt. knee) and total knee arthroplasty (Lt. knee) show findings at the 4-year follow-up.
![jkoa-43-451-g001](/upload/SynapseData/ArticleImage/0043jkoa/jkoa-43-451-g001.jpg)
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