Conventional versus helical blade screw insertion following the removal of the femoral head screw: A biomechanical evaluation using trochanteric gamma 3 locking nail versus PFN antirotation

When a hip screw needs to be changed, choosing between the conventional (C-type) and helical blade (H-type) types is difficult. In this biomechanical study, we compared these two screw types relative to the type of the initial screw used.