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Background:Bennett fracture belongs to intraarticular injury.Conventionally,external fixation with splint or plaster failures to maintain postrepair position,leading to fracture and translocation.On the other hand,longer term outer fixation will result in joint stiffness.Internal fixation with Kirschner pins in combination of postoperative training was characterized by stable fixation,less injury,allow early functional exercise and is beneficial to recovery of joint function.