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Motor function‐TFI; *P < 0.05 vs group A; ▲ P < 0.05 vs group B. Group A, sciatic nerve without surgical procedures; group B, sciatic nerve graft orthotopic transplantation by adventitial suture; group C, sural nerve graft transplantation by adventitial suture; group D, sural nerve graft transplantation by bridging with a chitin catheter
