Fig. 2

Surgical procedure for the large depressed fracture of the lateral femoral condyle. a The picture showing an extensive depressed osteochondral fracture on the lateral femoral condyle (approximately 20 × 30 mm). b After debridement and curettage of the lesion, an iliac cortical bone graft was fixed with three Poly-L-Lactic Acid pins. c Chondrocytes-atelocollagen gel was put on the defect area. d Iliac periosteum was sutured with 5–0 nylons to the surrounding rim