Prosthesis with cut-off pegs and surgical method
AssigneeDePuy Products, Inc.
InventorsDAREN L. DEFFENBAUGH, ANTHONY D. ZANNIS
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Abstract
A joint prosthesis system has two metal implant components and a bearing. One of the metal implant components has an articulation surface for articulation with the bearing. The other metal implant component has a mounting surface for supporting the bearing. An extension extends out from a junction at the bone-engaging surface of one of the metal components to an exposed end. The extension has a thickness at the junction and comprises porous metal across the entire thickness of the extension at the junction.
Claims7
A joint prosthesis comprising:
- a first metal implant component having a solid metal articulation surface and a bone-engaging surface;
- a bearing having an articulation surface shaped to bear against the articulation surface of the metal component and an opposite surface;
- and
- a second metal implant component having a solid metal mounting surface and an opposite bone-engaging surface;
- and
- an extension extending out from a junction at the bone-engaging surface of one of the metal components to an exposed end;
- wherein:
- the extension is configured for stabilizing the metal component when implanted in a bone of a patient;
- the extension has a thickness at the junction;
- and
- the extension comprises porous metal across the entire thickness of the extension at the junction.
A method of removing an orthopaedic implant from a bone, wherein the orthopaedic implant comprises a body having a bone-engaging surface engaging the bone at an interface and an extension extending deeper into the bone, the method comprising the steps of:
- introducing a saw blade between the bone-engaging surface of the body and the bone at the interface to separate the bone-engaging surface from the bone and sawing through the extension to separate the extension from the body.
Dependencies are inferred from the claim text.