Hip replacement systems and methods
First Claim
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1. A femoral prosthesis for implantation into a resected proximal end of a femur, the prosthesis comprising:
- a stem having a proximal end and a distal end,a collar portion for placement in a location adjacent the proximal end of the stem to engage at least a portion of the resected proximal end of the femur, wherein the collar portion comprises a substantially rigid material and includes an interior surface sized and configured to be at least partially in intimate contact with an unresected outer surface of the femur when the stem is implanted into the femur,wherein the interior surface includes a patient-specific portion at least partially in intimate contact with the unresected outer surface of the femur.
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Abstract
Disclosed are systems, methods, devices and surgical techniques for joint arthroplasty, including implant components that facilitate the position and implantation of a hip replacement using cutting guides and various femoral implant arrangements.
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Citations
18 Claims
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1. A femoral prosthesis for implantation into a resected proximal end of a femur, the prosthesis comprising:
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a stem having a proximal end and a distal end, a collar portion for placement in a location adjacent the proximal end of the stem to engage at least a portion of the resected proximal end of the femur, wherein the collar portion comprises a substantially rigid material and includes an interior surface sized and configured to be at least partially in intimate contact with an unresected outer surface of the femur when the stem is implanted into the femur, wherein the interior surface includes a patient-specific portion at least partially in intimate contact with the unresected outer surface of the femur. - View Dependent Claims (2, 3)
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4. A femoral prosthesis for implantation into a resected proximal end of a femur, the prosthesis comprising:
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a stem having a proximal end and a distal end, a collar portion for placement in a location adjacent the proximal end of the stem to engage at least a portion of the resected proximal end of the femur, wherein the collar portion comprises a substantially rigid material and includes an interior surface sized and configured to be at least partially in intimate contact with an unresected outer surface of the femur when the stem is implanted into the femur, wherein at least a portion of the collar portion is pre-operatively shaped to substantially match one or more anatomical features of the patient. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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- 14. A femoral prosthesis for implantation into a resected proximal end of a femur, the prosthesis comprising a stem having a proximal end and a distal end a collar connected to the stem, the collar having a stem engagement portion for engaging the stem and a bone engagement portion for engaging a bone surface of the femur, wherein the collar includes an interior engagement surface having a patient-specific portion at least in intimate contact with an unresected periosteal surface of the femur, and the stem includes an exterior engagement surface configured to match at least a portion of an endosteal surface of the femur, wherein the collar further includes a resected bone engagement surface positioned between the interior engagement surface and the exterior engagement surface, the resected bone engagement surface configured to engage a resected bone surface of the femur.
Specification