Blade-like shaft of a hip joint prosthesis
AssigneeSmith & Nephew Orthopaedics AG
InventorsWalter Moser, Alex Seidl, Dirk Wunderle
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Abstract
A blade-like stem of a hip joint prosthesis for anchoring in the femur, including a prosthesis neck portion and a femur-anchoring portion extending therefrom and having a proximal end and a distal end, the femur-anchoring portion including a proximal arcuate portion extending from a location adjacent the proximal end and having a radius of curvature that changes in a distal-to-proximal direction, and the femur-anchoring portion further including a distal tapered portion extending from the proximal arcuate portion toward the distal end.
Claims18
A hip joint prosthesis stem for anchoring in a femur, comprising:
- a prosthesis neck portion;
- and
- a femur-anchoring portion extending from the prosthesis neck portion and having a proximal end and a distal end, and including:
- a proximal arcuate portion extending from a location adjacent the proximal end and along a tractrix curvature;
- and
- a distal tapered portion extending from the proximal arcuate portion toward the distal end.
A hip joint prosthesis stem for anchoring in a femur, comprising:
- a prosthesis neck portion;
- and
- a femur-anchoring portion extending from the prosthesis neck portion and having a proximal end and a distal end, and including:
- a proximal arcuate portion extending from a location adjacent the proximal end along a tractrix curvature and having a radius of curvature that changes in a distal-to-proximal direction;
- and
- a distal tapered portion extending from the proximal arcuate portion toward the distal end.
A hip joint prosthesis stem for anchoring in a femur, comprising:
- a prosthesis neck portion;
- and
- a femur-anchoring portion extending from the prosthesis neck portion and having a proximal end and a distal end, and including:
- a proximal arcuate portion extending from a location adjacent the proximal end along a tractrix curvature and having a radius of curvature that decreases in a distal-to-proximal direction;
- and
- a distal tapered portion extending tangentially from the proximal arcuate portion toward the distal end.
Dependencies are inferred from the claim text.