Patent ID: 8840675

Claim:
A durable resurfacing hip replacement device comprising: a long nail portion configured to be inserted into a shaft body of a femur from a top portion of the femur and disposed in the femur, wherein the long nail portion is bent slightly by a predetermined angle in a middle portion, wherein an upper part of the long nail portion is wider than a lower part of the long nail portion, wherein the long nail portion comprises a plurality of larger and smaller circular cross-sections, tapered sections and a bend and is hollow, wherein the long nail portion further comprises a set screw configured to engage threads provided inside the long nail portion; a lag screw portion engaging and anchoring at the long nail portion through a lag screw hole with an angle from about 110 degrees to about 140 degrees, wherein the lag screw portion is configured to be inserted into a neck of the femur; and a resurfacing head comprising a cup portion with an open interior configured to receive and cover a portion of a natural head, having a surface portion thereof removed such that the portion of the natural head is fitted in the open interior of the cup portion, of the femur and a fixing pin portion configured to penetrate and be inserted into the portion of the natural head and the neck of the femur and engaging the lag screw portion through a resurfacing head hole to support the cup portion, wherein the lag screw portion comprises: a support portion configured to be queued into the lag screw hole; a screw portion extending from the support portion; the resurfacing head hole provided through the screw portion; and a locking groove provided lengthwise along an outer surface of the support portion, wherein the set screw is configured to proceed along the threads provided inside the long nail portion and lock into the locking groove of the lag screw portion so as to prevent from rotating and allowing the lag screw portion to slide along the lag screw hole.