Abstract: A pedicle screw assembly having a spine rod clamping body designed for exhibiting a limited amount of elastic deformation at a region location between its spine rod mounting portion and its bone screw connecting portion. When the pedicle screw assembly is placed in a spine stabilization procedure, a limited amount of motion within the fixation apparatus as a result of the spine rod clamping body exhibiting a limited amount of elastic deformation at the region location between its spine rod mounting portion and its bone screw connecting portion. This limited amount of motion can accelerate bone fusion. By reducing movement-induced stress concentrations, the limited amount of elastic deformation provided by the spine rod clamping body can enhance a rate at which bone fusion progresses and can reduce the potential for damage to the interface between the bone screw and bone.