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The transplantation of biphase scaffold group and cell sheet group. In biphase scaffold group, the Chondrocytes-PGA/PLA composition (A) covered with BMSCs-PCL/HA composition and sutured together (B). In cell sheet group, cartilage cell sheet (D) was cut to fit PCL/HA scaffold and was folded into two layers, sutured with BMSCs-PCL/HA composition together (E). Then, the grafts were implanted into the mini-pig (C, F).
