Figure 2.

Macroscopic appearance of osteochondral graft transplantation site on femoral condyles at 3 months (A) and 6 months (B) postoperatively. (C) OAS scores in each experimental group. OCA day 14, allogeneic graft transplantation day; OAT day 0, autologous graft transplantation day. OAT3, autologous graft after 3 months; OAT6, autologous graft after 6 months; OCA3, allogeneic graft after 3 months; OCA6, allogeneic graft after 6 months. OAS, Oswestry arthroscopy score; OCA, allogeneic graft; OAT, autologous graft; PRP, platelet-rich plasma. x and xx indicate maximum score for normal cartilage repair, ^#P=0.016, ^##P = 0.004, *P < 0.001, **P = 0.01.