Abstract A hip joint prosthesis of generally conventional configuration in that it includes an elongated tapered spindle curving slightly laterally at its major dimension end with the latter including a partial spherical head for universal engagement in a pelvis mounted socket provided therefor. The prosthesis departs from the conventional prosthesis or similar apparatus in that the spindle is provided with longitudinally spaced and transversely extending apertures and one side of the head is provided bores with laterally outwardly opening parallel bores. A combined jig and drill guide is also provided and includes a plurality of locating pins telescopingly receivable in the bores and sleeve portions supported in fixed relation relative to the locating pins aligned with the apertures when the guide has its locating pins disposed in the bores. The spindle is first driven into the medullary cavity and thereafter the guide is positioned alongside the femur with the locating pins received in the bores. Thereafter, a suitable drill may be inserted through and guided by the sleeve portions for drilling bores in the femur aligned with the apertures formed in the spindle disposed in the medullary cavity. After removal of the drill guide suitable threaded fasteners may be threaded through the bres formed in the femur and the apertures formed in the spindle of the prosthesis to thereby lock the spindle in fixed relation relative to the femur so as to eliminate relative movement between the prosthesis spindle and the femur.
In combination, a prosthesis comprising an elongated spindle having a head on one end and being adapted at its other end for endwise insertion into the exposed end of a bone component, said spindle being provided with longitudinally spaced transverse apertures, a positioning jig and drill guide assembly, said assembly including an elongated body, said head and one end of said body including coacting releasably engaged indexing means supporting said body from said head against longitudinal as well as transverse shifting and angular displacement relative to said prosthesis and with the other end portion of said body extending along said spindle, said other end portion of said body including means defining longitudinally spaced transversely extending guide means aligned with said apertures, said guide means being adapted to guidingly support a rotatable drill bit axially advanced toward said bone component with said drill bit aligned with said apertures, thereby insuring that the apertures or bores formed in the bone will be aligned with the apertures formed in the prosthesis spindle, said guide means comprising generally semicylindrical sleeve portions carried by and opening laterally outwardly of one marginal edge portion of said body, a secondary plate pivotally supported from said body for swinging movement of one edge portion thereof toward and away from the aforementioned edge portion of said body, the second mentioned edge portion including generally semi-cylindrical sleeve portions registrable with the first mentioned semi-cylindrical sleeve portions upon swinging of said edge portions together to form generally cylindrical sleeve portions through which said drill bit may be guidingly advanced.
Claim 2
Dependent Claim
258 words
In combination, a prosthesis comprising an elongated spindle having a head on one end and being adapted at its other end for endwise insertion into the exposed end of a bone component, said spindle being provided with longitudinally spaced transverse apertures, a positioning jig and drill guide assembly, said assembly including an elongated body, said head and one end of said body including coacting releasably engaged indexing means supporting said body from said head against longitudinal as well as transverse shifting and angular displacement relative to said prosthesis and with the other end portion of said body extending along said spindle, said other end portion of said body including means defining longitudinally spaced transversely extending guide means aligned with said apertures, said guide means being adapted to guidingly support a rotatable drill bit axially advanced toward said bone component with said drill bit aligned with said apertures, thereby insuring that the apertures or bores formed in the bone will be aligned with the apertures formed in the prosthesis spindle, said guide means comprising generally semicylindrical sleeve portions carried by and opening laterally outwardly of one marginal edge portion of said body, a secondary plate pivotally supported from said body for swinging movement of one edge portion thereof toward and away from the aforementioned edge portion of said body, the second mentioned edge portion including generally semi-cylindrical sleeve portions registrable with the first mentioned semi-cylindrical sleeve portions upon swinging of said edge portions together to form generally cylindrical sleeve portions through which said drill bit may be guidingly advanced.
Claim 3
Dependent Claim
52 words
The combination of claim 1 wherein said body member and the pivoted portion thereof include coacting means for releasably retaining said body and swingable portion against angular displacement relative to each other with said edge portions swung toward each other and said semi-cylindrical sleeve portions opposing each other to form cylindrical sleeves.