Neck sparing total hip implant system
First Claim
1. A femoral prosthesis comprising:
- an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising;
a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and
a trunk at the distal end, the trunk comprising;
a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, anda medial column extending from the shoulder toward the distal end, the medial column disposed on a medial side of the wedge;
a lateral column extending from the shoulder toward the distal end, the lateral column disposed on a lateral side of the wedge;
the wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur;
a medial column axis parallel to the long axis of the implant body, the medial column axis running through successive center points of the medial column;
wherein an outer surface of the medial column has a lateral cross-section comprising an arc having a substantially constant radius from a center point of the medial column; and
a medial cannula along the medial column axis;
wherein the implant body has a substantially straight long axis so that the implant body does not curve into the diaphysis of the femur.
1 Assignment
0 Petitions
Accused Products
Abstract
A femoral prosthesis. The femoral prosthesis includes an implant body having a proximal end and a distal end and a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur. The implant body includes a trunk at the distal end, the trunk having a wedge formed by a tapered portion extending in the direction of the distal end of the implant body. The implant body also includes a medial column extending from the shoulder toward the distal end and a lateral column extending from the shoulder toward the distal end. The wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area for fixation of the implant body.
44 Citations
53 Claims
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1. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial column extending from the shoulder toward the distal end, the medial column disposed on a medial side of the wedge; a lateral column extending from the shoulder toward the distal end, the lateral column disposed on a lateral side of the wedge; the wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; a medial column axis parallel to the long axis of the implant body, the medial column axis running through successive center points of the medial column; wherein an outer surface of the medial column has a lateral cross-section comprising an arc having a substantially constant radius from a center point of the medial column; and a medial cannula along the medial column axis; wherein the implant body has a substantially straight long axis so that the implant body does not curve into the diaphysis of the femur. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial column extending from the shoulder toward the distal end, the medial column disposed on a medial side of the wedge; a lateral column extending from the shoulder toward the distal end, the lateral column disposed on a lateral side of the wedge; the wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; further comprising a plurality of terraces disposed on the wedge. - View Dependent Claims (26)
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27. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial column extending from the shoulder toward the distal end, the medial column disposed on a medial side of the wedge; a lateral column extending from the shoulder toward the distal end, the lateral column disposed on a lateral side of the wedge; the wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; wherein the medial column is at least thirty (30) percent larger than the lateral column by cross-sectional area.
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28. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial fin extending from the shoulder toward the distal end, the medial fin disposed on a medial side of the wedge; a lateral fin extending from the shoulder toward the distal end, the lateral fin disposed on a lateral side of the wedge; the wedge, the medial fin, and the lateral fin to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; a medial fin axis parallel to the long axis of the implant body, the medial fin axis running through successive center points of the medial fin; wherein an outer surface of the medial fin has a lateral cross-section comprising an arc having a substantially constant radius from a center point of the medial fin; and a medial cannula along the medial fin axis; wherein the implant body has a substantially straight long axis so that the implant body does not curve into the diaphysis of the femur. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial fin extending from the shoulder toward the distal end, the medial fin disposed on a medial side of the wedge; a lateral fin extending from the shoulder toward the distal end, the lateral fin disposed on a lateral side of the wedge; the wedge, the medial fin, and the lateral fin to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; wherein the implant body has a substantially straight long axis so that the implant body does not curve into the diaphysis of the femur; a lateral fin axis parallel to the long axis of the implant body, the lateral fin axis running through successive center points of the lateral fin; wherein an outer surface of the lateral fin has a lateral cross-section comprising an arc having a substantially constant radius from a center point of the lateral fin; and a lateral cannula along the lateral fin axis.
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43. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial fin extending from the shoulder toward the distal end, the medial fin disposed on a medial side of the wedge; a lateral fin extending from the shoulder toward the distal end, the lateral fin disposed on a lateral side of the wedge; the wedge, the medial fin, and the lateral fin to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; wherein the implant body has a substantially straight long axis so that the implant body does not curve into the diaphysis of the femur; a medial fin axis running through successive center points of the medial fin; wherein an outer surface of the medial fin has a lateral cross-section comprising a medial fin arc having a substantially constant radius from a center point of the medial fin; a cannula along the medial fin axis; a lateral fin axis parallel to the medial fin axis, the lateral fin axis running through successive center points of the lateral fin; wherein an outer surface of the lateral fin has a lateral cross-section comprising a lateral fin arc having a substantially constant radius from a center point of the lateral fin; and a lateral cannula along the lateral fin axis.
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44. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial fin extending from the shoulder toward the distal end, the medial fin disposed on a medial side of the wedge; a lateral fin extending from the shoulder toward the distal end, the lateral fin disposed on a lateral side of the wedge; the wedge, the medial fin, and the lateral fin to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; further comprising a plurality of terraces disposed on the wedge. - View Dependent Claims (45)
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46. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial fin extending from the shoulder toward the distal end, the medial fin disposed on a medial side of the wedge; a lateral fin extending from the shoulder toward the distal end, the lateral fin disposed on a lateral side of the wedge; the wedge, the medial fin, and the lateral fin to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; wherein the medial fin is at least thirty (30) percent larger than the lateral fin by cross-sectional area.
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47. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; and a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial fin extending from the shoulder toward the distal end, the medial fin disposed on a medial side of the wedge; a lateral fin extending from the shoulder toward the distal end, the lateral fin disposed on a lateral side of the wedge; the wedge, the medial fin, and the lateral fin to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; further comprising a central fin extending from the wedge.
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48. A system for a femoral prosthesis comprising:
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an implant body comprising; a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial column extending from the shoulder toward the distal end, the medial column disposed on a medial side of the wedge; a lateral column extending from the shoulder toward the distal end, the lateral column disposed on a lateral side of the wedge; a medial column axis running through successive center points of the medial column; wherein an outer surface of the medial column has a lateral cross-section comprising a medial column arc having a substantially constant radius from a center point of the medial column; a medial cannula along the medial column axis; a lateral column axis parallel to the medial column axis, the lateral column axis running through successive center points of the lateral column; wherein an outer surface of the lateral column has a lateral cross-section comprising a lateral column arc having a substantially constant radius from a center point of the lateral column; and a lateral cannula along the lateral column axis; the wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; and a neck sizing template comprising; an outer perimeter sized to match an outer perimeter of the shoulder of the implant body; a first aperture corresponding to one of the medial cannula and the lateral cannula; and a second aperture corresponding to the other of the medial cannula and the lateral cannula. - View Dependent Claims (49, 50, 51, 52)
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53. A femoral prosthesis comprising:
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an implant body having a proximal end and a distal end, the proximal end being dimensioned and configured to support a prosthetic neck, the implant body comprising; a shoulder at the proximal end, the shoulder being structured and dimensioned for a tight press fit into the neck of a femur; a trunk at the distal end, the trunk comprising; a wedge formed by a tapered portion extending in the direction of the distal end of the implant body, and a medial column extending from the shoulder toward the distal end, the medial column disposed on a medial side of the wedge, the medial column having a cross-section having an outer surface that is substantially a portion of a circle; a medial column axis running through successive center points of the medial column; wherein an outer surface of the medial column has a lateral cross-section comprising a medial column arc having a substantially constant radius from a center point of the medial column; a medial cannula along the medial column axis; a lateral column extending from the shoulder toward the distal end, the lateral column disposed on a lateral side of the wedge, the lateral column having a cross-section having an outer surface that is substantially a portion of a circle; a lateral column axis parallel to the medial column axis, the lateral column axis running through successive center points of the lateral column; wherein an outer surface of the lateral column has a lateral cross-section comprising a lateral column arc having a substantially constant radius from a center point of the lateral column; and a lateral cannula along the lateral column axis; and a terminal flare disposed at a proximal end of the medial column, the terminal flare configured to contact an internal medial calcar region of the femoral bone, such that load is transferred medially from the implant body component to the medial calcar region the wedge, the medial column, and the lateral column to provide multi-planar stability for the implant body and surface area apart from the shoulder for fixation of the implant body with the femur; wherein the implant body has a substantially straight long axis so that the implant body does not curve into the diaphysis of the femur; and wherein the implant body is sized so that the distal end of the implant body extends a length of between sixty (60) percent and eighty (80) percent of a distance from a resection of a femur head of a femur to an inner cortical lateral wall of the femur.
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Specification