Fig. 7From: Restoration of a large osteochondral defect of the knee using a composite of umbilical cord blood-derived mesenchymal stem cells and hyaluronic acid hydrogel: a case report with a 5-year follow-upMagnetic resonance image. a, b, c The repair of the osteochondral defect at postoperative 1Â year was observed and d, e, f the repaired tissue was maintained for 5.5Â years without deteriorationBack to article page