Trochlear implants and methods of use
First Claim
Patent Images
1. An implant comprising:
- (a) an articular end having an upper surface, a side surface, and a lower surface;
wherein the upper surface and lower surface each intersect the side surface, the upper surface has a first surface curvature, a central surface curvature, and a second surface curvature;
wherein the central surface curvature is formed along a partial torus and has a saddle point;
wherein the upper surface blends into the side surface, the side surface blends into the upper surface and the lower surface, and the lower surface blends into the side surface; and
wherein each blend has an edge radius of from about 0.1 millimeters to about 2 millimeters; and
(b) a stem that extends from the lower surface in a direction away from the upper surface of the articular end and has a central axis;
wherein the location of the saddle point is offset along a horizontal direction from the location of the central axis by a distance ranging from between about 1 to about 5 millimeters; and
wherein the stem has at least one groove about its perimeter, the at least one groove defined by a partial torus having a tubular radius ranging from about 0.25 millimeters to about 2 millimeters.
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Abstract
Implant devices, and method of using the same, are provided. The implant devices have an articular end and a stem, the stem having an oval-shaped cross-section. The articular end has an upper surface, a side surface, and a lower surface. The upper surface and lower surface each intersect the side surface. The upper surface has a first surface curvature, a central surface curvature, and a second surface curvature. The stem extends from the lower surface in a direction away from the upper surface of the articular end.
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Citations
56 Claims
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1. An implant comprising:
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(a) an articular end having an upper surface, a side surface, and a lower surface; wherein the upper surface and lower surface each intersect the side surface, the upper surface has a first surface curvature, a central surface curvature, and a second surface curvature; wherein the central surface curvature is formed along a partial torus and has a saddle point; wherein the upper surface blends into the side surface, the side surface blends into the upper surface and the lower surface, and the lower surface blends into the side surface; and wherein each blend has an edge radius of from about 0.1 millimeters to about 2 millimeters; and (b) a stem that extends from the lower surface in a direction away from the upper surface of the articular end and has a central axis; wherein the location of the saddle point is offset along a horizontal direction from the location of the central axis by a distance ranging from between about 1 to about 5 millimeters; and wherein the stem has at least one groove about its perimeter, the at least one groove defined by a partial torus having a tubular radius ranging from about 0.25 millimeters to about 2 millimeters. - 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, 25, 26, 27)
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28. An implant comprising:
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(a) an articular end having an upper surface, a side surface, and a lower surface; wherein the upper surface and lower surface each intersect the side surface, the upper surface has a first surface curvature, a central surface curvature, and a second surface curvature; wherein the central surface curvature is formed along a partial torus and has a saddle point; (b) a stem that extends from the lower surface in a direction away from the upper surface of the articular end and has a central axis; wherein the location of the saddle point is offset along a horizontal direction from the location of the central axis by a distance ranging from between about 1 to about 5 millimeters; and wherein the stem has at least one groove about its perimeter, the at least one groove defined by a partial torus having a tubular radius ranging from about 0.25 millimeters to about 2 millimeters. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification