Stemmed femoral component for the human hip

Details Stemmed femoral component for the human hip Stemmed femoral component for the human hip

1983-06-20

1985-05-07

Apley, Richard J.

Surgery

Truss

Pad

3 191, 128 92C, 128 92CA, A61F 104

Patent

active

045148651

ABSTRACT:
A stemmed femoral component for the human hip for which fixation is provided in one embodiment by bony ingrowth and which may be easily removed for replacement thereof by an osteotone. The two-piece component includes a stem which is elongated and has on its proximal end a Morse cone and a laterally extending collar adapted to reside on the cortical bone in the region of the femoral neck. In the one embodiment the stem is textured or provided with a porous material on its outer surfaces only in the metaphyseal portion and only on the anterior, lateral, and posterior surfaces. The medial surface is smooth, as is the diaphyseal portion of the stem. In this manner, bony ingrowth takes place only in regions that can be reached with a osteotone for removal. A threaded extractor and mating hole in a driving platform may also be provided for removal. In a second embodiment a cement such as methylmethacrylate is used in place of the bony ingrowth on the anterior, lateral and posterior surfaces of the metaphyseal portion of the stem.

REFERENCES:
patent: 4406023 (1982-04-01), Harris

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