<prompt> Pipkins classification system is used for ?Fracture femur headFracture femur shaftFracture proximal tibiaFracture calcaneum  <response>: Ans. is a i.e., Fracture femur head Pipikins classification of femoral head fracture Type I : Femoral head fracture inferior caudal to fovea. Type II : Femoral head fracture superior cephalad to fovea. Type III : Femoral head fracture with associated femoral neck fracture. Type IV : Type I, II or III with associated acetabular fracture. 