Remodeling of long bones in children after posttraumatic deformity was accomplished by two distinctive mechanisms that axially oriented compression forces will slow physeal growth and simillarly oriented tensile forces tend to enhance physeal growth, which occur at the fracture site and physis. We reviewed 17 childrens with unilateral fractures of femoral shaft who had an angular deformity after union of 10degreewere selected and measured by C-T scans. The average correction rate was 84.9% of the initial deformity and was no relation between the remodeling rate and degree of malunion. The correction of angulation, only 25% had occurred at the fracture site and 75% at physis. Under the 10 years old, malunion as much as 23degreein any plane will remodel enough to give normal alignment of the joints surfaces.