Offset coupling for joint prosthesis
AssigneeJohnson & Johnson Professional, Inc.
InventorDennis P. Colleran
Life of this patent
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Abstract
A joint prosthesis component system allows an inferior component of a prosthesis system to be offset from a superior component of the system. In one embodiment the joint prothesis component system comprises a tibial tray having an offset tibial stem. An adapter element connects between the tibial tray and tibial stem to provide the desired degree of offset and the orientation of the offset. The adapter element is constructed such that a longitudinal axis extending through a first end thereof is offset from a longitudinal axis extending through a second end thereof.
Claims19
A modular joint prosthesis component, comprising:
- a tray element having a first surface that is mountable upon bone and a second, opposed surface, the first surface including an extension member;
- an adapter element having first and second ends wherein a first longitudinal axis extending through the first end is substantially parallel to but offset from a second longitudinal axis extending through the second end, the first end having a connection surface that is selectively matable with the extension member;
- and
- an elongate stem mountable within bone, the elongate stem having a first end that is selectively matable with a connection surface on the second end of the adapter element, the stem being mountable upon the adapter element such that a longitudinal axis of the elongate stem is colinear with the longitudinal axis of the second end of the adapter element.
An adapter element, for connection between two components of a joint prosthesis, comprising:
- a body having first and second ends wherein a first longitudinal axis extending through the first end is substantially parallel to but offset from a second longitudinal axis extending through the second end;
- a first connection surface integral with the first end that is adapted to mate with a first joint prosthesis component;
- and
- a second connection surface integral with the second end that is adapted to mate with a second joint prosthesis component;
- the adapter element being effective to join the first and second joint prosthesis components together such that a longitudinal axis extending through the second joint prosthesis component is offset from a longitudinal axis extending through the first joint prosthesis component,
- wherein the first connection surface is of a polygonal shape.
An adapter element, for connection between two components of a joint prosthesis, comprising:
- a body having first and second ends wherein a first longitudinal axis extending through the first end is substantially parallel to but offset from a second longitudinal axis extending through the second end;
- a first connection surface integral with the first end that is adapted to mate with a first joint prosthesis component;
- and
- a second connection surface integral with the second end that is adapted to mate with a second joint prosthesis component;
- the adapter element being effective to join the first and second joint prosthesis components together such that a longitudinal axis extending through the second joint prosthesis component is offset from a longitudinal axis extending through the first joint prosthesis component,
- further comprising an aperture extending through the first end thereof and a bolt member having a head and an opposed threaded end, the bolt member being insertable within the aperture to mate the adapter element with the first joint prosthesis component.
Dependencies are inferred from the claim text.