Abstract
Fourteen medial unicompartmental knee arthroplasties (UKA) using a minimally invasive solution (MIS) system were performed from 2002 to 2003. The M/G UKA System (9 knees), Oxford UKA System (5 knees) were used in the procedure.
The mean age at the operation was 76 years (66 to 85), and the mean follow-up was 12 months (9 to 21). Mean operation time was 115 minutes, except in the first to third cases. There was little bleeding. Mean preoperative hemoglobin content decreased from 11.9 g/dl to 11.0 g/dl on the next day of operation. No blood infusion was necessary in any case. The mean range of motion was 140 degrees before the operation and 132 degrees at the latest review. Postoperative maximal flexion was 130 degrees or more in 12 cases of the 14 cases. Mean days to stable 1 cane gait were 9.7 days (6 to 21). The mean JOA score for OA improved from 61 to 89 points.
The main advantage of this operation was minimally invasiveness and early functional recovery in patients over 70-years-old.
