Surgical Principles The goal of treating fractures in the trochanteric region is to restore the medial support in line with Shenton’s arch. The function of the compression trabeculae is insured by a screw introduced into the femoral head and neck. The shaft of the screw slides in a tunnel which forms part of the side plate. This permits early loading with impaction of the fracture without danger of the screw perforating the femoral head. The design of the screw shaft and the tunnel prevent rotation of the head fragment. This device does not function as a load-bearing but as a load-sharing implant. Load transmission occurs mostly through bone.