Fig. 2

a A longitudinal 2.5-cm incision was made in the proximal third of the patella. b The deep fascia and periosteum is incised with an approximately 2.5-cm longitudinal cut. c Creating a bone groove with a rongeur at the upper one third and medial one fourth of the patellar surface. d The patellar bone groove was created. e A 3.0-mm-diameter suture anchor is used to strengthen the fixation of the graft. The site of drilling was in the middle of bone groove. The direction of the drilling referred to the safety angle according to patellar morphology. f The sutures on the anchor were then tied around the graft. The graft was then embedded into the periosteum and deep fascia with absorbable suture. g The two free ends of the graft were pulled out through the subcutaneous fascial layers. h The two free ends were pulled into the femoral tunnel by pulling the two sutures