Femoral head remodeling and femoral insert and drilling aid therefor

摘要

An improved femoral hip joint replacement and method are disclosed, as well as a drilling fixture to assist with carrying out the method. The method involves the provision of an elongated excavation or aperture by drilling of overlapping boreholes in the top of the femoral head, and then securing therein a similarly-contoured femoral insert adapted to be located within the femoral shaft and within the boreholes in the remaining upstanding portions of the remodeled femoral head. A metal cap, of approximately the normal femoral head size, or an arcuate portion thereof, is secured to or integral with the insert and projects in usual manner from the superior portion of the remodeled femoral head and is adapted to fit into an acetabulum of the hipbone. According to the method of the invention and with the employment of the femoral hip joint replacement provided thereby, there is substantially no chance of axial or rotational movement of the femoral hip joint replacement or any portion thereof within the femoral shaft or with respect to the remoldeled femoral head, and the remodeled femoral head produced according to the invention and employing the femoral hip joint prosthesis of the invention is accordingly characterized by superior load-bearing characteristics and stability in operation.