Before revision: There are 3 components of a dynamic hip screw, including a lag screw (inserted into the neck of the femur), a sideplate and four cortical screws (fixated into the proximal femoral shaft) The idea behind the dynamic compression is that the femoral head component is allowed to move along one plane; since bone responds to dynamic stresses, the native femur may undergo remodeling and proper fracture healing .
After revision: There are 3 components of a dynamic hip screw, including a lag screw (inserted into the neck of the femur), a sideplate and four cortical screws (fixated into the proximal femoral shaft) The idea behind the dynamic compression is that the femoral head component is allowed to move along one plane; since bone responds to dynamic stresses, the native femur may undergo primary healing: cells join along boundaries, resulting in a robust joint requiring no remodeling .