Fig. 4.

Pre-operative (3 days) and post-operative (1 month) X-ray examinations (axial patella view) of a 68-year-old woman with bilateral osteoarthritis. Left: non-resurfaced patella. Right: resurfaced patella. One-month after the operation, the patient’s pain was significantly relieved, the activities were recovered well, and the post-operative joint flexion activity reached 110°. a Axial position 3 days before operation. b Left knee joint in the axial position 1 month after operation. c Right knee joint in axial position 1 month after operation