The present invention provides a prosthesis for hip joint surface replacement surgery, which employs the computerized tomography (CT) to obtain the tomographic images and data (RP) near artificial thighbone, and employs the data to produce the artificial thighbone identical to human bone. The doctor uses the artificial thighbone to determine the location of center hole. The computer employs the inversely deduced data to produce the positioning device prosthesis, and mounts the positioning device prosthesis on the human bone for surface replacement, which is first to directly drill a hole based on the location of center hole for the positioning device prosthesis then, directly penetrating the core bar of the conventional particular tool into the drilled hole polishing with a particular tool for a cylindrical surface of thighbone, and mounting on the artificial thighbone element, so as to achieve a precision implementation.一種利於髖關節表面置換手術之輔具,係以電腦斷層掃描(CT)獲取人造股骨近端斷層影像及數據(RP),以此數據得以製作出與人骨相同之人工股骨,醫師以人工股骨判斷其中心孔位置,電腦以反推數據製作出定位裝置輔具,再將定位裝置輔具放在人骨上,進行表面置換,首先依定位裝置輔具之中心孔位置,直接鑽孔。再用習用的特殊工具其心桿直接穿入已鑽好的孔處,並以特殊工具研磨出股骨的圓柱表面,再裝上人工股骨元件,即完成其準確施作的目的。(20)...人工股骨(21)...中心孔(22)...特徵區域(30)...定位裝置輔具(31)...定位裝置(32)...中心孔(40)...關節軟骨所佔空間
