Modular femoral stem component for a hip joint prosthesis
AssigneeDePuy Products, Inc.
InventorsAlfred S. Despres, III, Daniel E. E. Hayes, Jr.
Life of this patent
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Abstract
A prosthetic femoral stem component includes a body element, a neck element and a stem element. The body element, neck element and stem element are secured to one another with a modular connection, the modular connection having a taper junction and an engaged-fit junction. The engaged-fit junction is formed by interaction of first and second concentric walls, the first concentric wall being formed on a shaft of the neck element and the second concentric wall being formed along a portion of a sidewall defining an aperture extending through the body element.
Claims10
A modular connection for connecting together a plurality of separate elements to form a prosthetic femoral stem component, said modular connection comprising, in combination, a taper junction and an engaged-fit junction;
- wherein said engaged-fit junction is formed by interaction of a first concentric wall with a second concentric wall;
- wherein the first concentric wall is formed on a shaft of a neck element, and the second concentric wall is formed along a portion of a sidewall defining an aperture extending through a body element;
- wherein the first concentric wall is located internally of the second concentric wall;
- and
- wherein the first concentric wall is deformed so as to be pressure locked against the second concentric wall.
A prosthetic femoral stem component comprising a body element, a neck element and a stem element, with said body element, said neck element and said stem element being secured to one another with a modular connection;
- wherein the modular connection comprises, in combination, a taper junction and an engaged-fit junction;
- wherein said taper junction is formed by interaction of a first taper with a second taper;
- wherein the first taper is formed on a shaft of said neck element, and the second taper is formed along a portion of a sidewall defining an aperture extending through said body element;
- wherein said engaged-fit junction is formed by interaction of a first concentric wall with a second concentric wall;
- wherein the first concentric wall is formed on a shaft of said neck element, and the second concentric wall is formed along a portion of the sidewall defining an aperture extending through said body element, and
- wherein the first concentric wall is deformable so as to be pressure locked against the second concentric wall.
A prosthetic femoral stem component comprising a body element, a neck element and a stem element, with said body element, said neck element and said stem element being secured to one another with a modular connection;
- wherein the modular connection comprises, in combination, a taper junction and an engaged-fit junction;
- wherein said taper junction is formed by interaction of a first taper with a second taper;
- wherein the first taper is formed on a shaft of said neck element, and the second taper is formed along a portion of a sidewall defining an aperture extending through said body element;
- wherein said engaged-fit junction is formed by interaction of a first concentric wall with a second concentric wall;
- wherein the first concentric wall is formed on a shaft of said neck element, and the second concentric wall is formed along a portion of the sidewall defining an aperture extending through said body element;
- wherein the first concentric wall is located internally of the second concentric wall;
- and
- wherein the first concentric wall is deformable to be pressure locked against the second concentric wall.
A prosthetic femoral stem component comprising a body element, a neck element and a stem element, with said body element, said neck element and said stem element being secured to one another with a modular connection;
- wherein the modular connection comprises, in combination, a taper junction and an engaged-fit junction;
- wherein:
- said taper junction is formed by interaction of a first taper with a second taper, with the first taper being formed on a shaft of said neck element, and the second taper being formed along a portion of a sidewall defining an aperture extending through said body element;
- and
- the engaged-fit junction is formed by interaction of a first concentric wall with a second concentric wall, with the first concentric wall being formed on the shaft of said neck element, and the second concentric wall being formed along a portion of the sidewall defining the aperture extending through said body element;
- and
- wherein the first concentric wall is deformable so as to be pressure locked against the second concentric wall.
Dependencies are inferred from the claim text.