Fig. 5.

A 77-year-old woman visited our clinic with both knee pain for 7 years (A). We performed left total knee arthroplasty using Zimmer LPS-Flex Fixed (B). At the last follow-up (13 months after total knee arthroplasty), flexion contracture of left knee joint was 0°, and KSKS was 94 points, which was 49 points preoperatively, and KSFS was 95 points, which was 51 points preoperatively, and WOMAC score was 13 points, which was 84 points preoperatively. Maximal flexion angle of left knee joint was 140°, which was 119° preoperatively, and cross-legged sitting position and kneeling position were all possible (C). KSKS: Knee Society Knee Score, KSFS: Knee Society Functional Score, WOMAC: Western Ontario and McMaster Universities Arthritis Index.