Fig. 3

Images from a 55-year-old woman show the following: (a) Ahlbäck grade I osteoarthritis with varus alignment of the lower limb before open wedge high tibial osteotomy with microfracture of the medial femoral condyle and medial tibial plateau; (b) Postoperative alignment of the lower limb was unsatisfactory (WBL ratio, 47.1%); (c) Second-look arthroscopy shows sufficient restoration of the articular cartilage at postoperative 23 months. The postoperative Knee Society knee and function scores were 55 and 60 points, respectively, and the postoperative Western Ontario and McMaster Universities total score was 29 points, all of which were unsatisfactory