抄録
Preoperative range of motion affects postoperative range of motion after total knee arthroplasty. This study investigated the results of high-flexion total knee arthroplasty. Between January 2005 and December 2008, 54 TKA (PFC sigma RP-F) procedures for osteoarthritis were performed. Forty-four knees in 37 patients were studied (in 3 males and 34 females ; mean age 74.5 years), with a mean follow-up period of 24 months. The preoperative mean flexion angle improved from 114.2° to 122.6° after TKA.
Twenty-eight knees achieved high flexion of more than 130° after surgery. There was a statistically significant correlation between the preoperative and the postoperative flexion angles. The Japanese Otrhopaedic Association knee rating score (JOA score) was improved from 52.9 to 79.8, the Knee Society score (knee score) from 50.6 to 96.7, and the Knee Society score (function score) from 35.1 to 72.8. Patellar clunk syndrome occurred in one knee.
In the present study, the PFC sigma RP-F was associated with an improvement of flexion accompanied by a good clinical outcome. The preoperative flexion angle affected the postoperative flexion angle after high-flexion TKA.
