How long can a comminuted fracture of the leg go to the ground cannot be generalized, but depends on the different treatment methods for different conditions. First, if the comminuted fracture is not heavy, the displacement is not obvious, but the cast fixed, generally need 8-12 weeks, this time the fracture basic healing, before you can carry crutches limited weight bearing, local slow activity. Second, comminuted fracture of the leg bone, if the surgery, the internal fixation surgery, this time generally need 6-8 weeks, can carry out crutches gradually for weight-bearing activities, and so on 3 months later can completely remove the crutches, to carry out some basic sports.