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US 10,500,054 B2Granted
Femoral prostheses with upsizing and downsizing capabilities
AssigneeZimmer, Inc.
InventorVanessa Croll
Life of this patent
Estimating the term…
Abstract
According to one example, a femoral prosthesis system is provided that has a plurality of sizing options using two families of femoral prostheses is disclosed. The second family of femoral prostheses can have a predetermined increase in femoral posterior condylar offset relative to the first family of femoral prosthesis. In one example, the second family of femoral prostheses can have the predetermined increase in the femoral posterior condylar offset while maintaining substantially a same femoral medial-lateral condylar extent relative to a comparably sized one of the first family of femoral prostheses.
Claims22
A system for knee arthroplasty comprising:
- a first family having a first plurality of femoral prostheses with different stock sizes from one another, each of the first plurality of femoral prostheses having:
- a first stem housing extending along a first axis;
- and
- a first medial condyle and a first lateral condyle coupled to the first stem housing;
- wherein the first medial condyle and the first lateral condyle have a first posterior condylar offset as measured from the first axis to a first posterior-most point of the first medial condyle and the first lateral condyle;
- and
- wherein the first medial condyle and the first lateral condyle have a first femoral medial-lateral condylar extent from a medial most edge of the first medial condyle to a lateral most edge of the first lateral condyle;
- a second family having a second plurality of femoral prostheses with different stock sizes from one another, each of the second plurality of femoral prostheses having:
- a second stem housing extending along a second axis;
- and
- a second medial condyle and a second lateral condyle coupled to the second stem housing;
- wherein the second medial condyle and the second lateral condyle have a second posterior condylar offset from the second axis to a second posterior-most point of the second medial condyle and the second lateral condyle;
- and
- wherein the second medial condyle and the second lateral condyle have a second femoral medial-lateral condylar extent from a medial most edge of the second medial condyle to a lateral most edge of the second lateral condyle;
- wherein the first femoral medial-lateral condylar extent of at least one of the first plurality of femoral prostheses and the second femoral medial-lateral condylar extent of at least one of the second plurality of femoral prostheses are substantially the same.
12 more elements
A system for knee arthroplasty comprising:
- a first family having a first plurality of femoral prostheses with different stock sizes from one another, each of the first plurality of femoral prostheses having:
- a first stem housing extending along a first axis;
- and
- a first medial condyle and a first lateral condyle coupled to the first stem housing;
- wherein the first medial condyle and the first lateral condyle have a first posterior condylar offset as measured from the first axis to a first posterior-most point of the first medial condyle and the first lateral condyle;
- and
- wherein the first medial condyle and the first lateral condyle have a first femoral medial-lateral condylar extent as measured from a medial most edge of the first medial condyle to a lateral most edge of the first lateral condyle;
- a second family having a second plurality of femoral prostheses with different stock sizes from one another, each of the second plurality of femoral prostheses having:
- a second stem housing extending along a second axis;
- and
- a second medial condyle and a second lateral condyle coupled to the second stem housing;
- wherein the second medial condyle and the second lateral condyle have a second posterior condylar offset as measured from the second axis to a second posterior-most point of the second medial condyle and the second lateral condyle;
- and
- wherein the second medial condyle and the second lateral condyle have a second femoral medial-lateral condylar extent as measured from a medial most edge of the second medial condyle to a lateral most edge of the second lateral condyle;
- wherein the first posterior condylar offset of at least one of the first plurality of femoral prostheses and the second posterior condylar offset of at least one of the second plurality of femoral prostheses are substantially the same;
- and
- wherein the first femoral medial-lateral condylar extent of the at least one of the first plurality of femoral prostheses and the second femoral medial-lateral condylar extent of the at least one of the second plurality of femoral prostheses differ by a first predetermined amount.
14 more elements
Dependencies are inferred from the claim text.