Trochlear groove implants and related methods and instruments
First Claim
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1. A trochlear groove implant for articulating with a patella, the trochlear groove implant comprising:
- a body having a first side with an articular surface, an opposing second side with a bone apposition surface, and a substantially uniform thickness between the articular surface and the bone apposition surface such that, at all locations at least 2 mm in from a perimeter edge of the body, the thickness of the body between the articular surface and the bone apposition surface does not vary by more than 20%, the articular surface and the bone apposition surface each extending between a proximal end and an opposing distal end of the body;
an elongated channel recessed on the first side of the body and longitudinally extending between the proximal end and the opposing distal end of the body, at least a first portion of the articular surface having a substantially smooth convex curvature extending between the proximal end and the distal end of the body, a second portion of the articular surface being at least one of flat and convexly curved in a direction transverse to the elongated channel, wherein the patella rides both in the elongated channel and against the second portion of the articular surface during normal articulation; and
an elongated ridge outwardly projecting on the second side of the body and longitudinally extending between the proximal end and the opposing distal end of the body, at least a portion of the bone apposition surface having a substantially smooth concave curvature extending between the proximal end and the distal end of the body.
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Abstract
A trochlear groove implant includes a body having a first side with an articular surface and an opposing second side with a bone apposition surface, the articular surface and the bone apposition surface each extending between a proximal end and an opposing distal end of the body. An elongated channel is recessed on the articular surface and longitudinally extends between the opposing ends of the body. An elongated ridge outwardly projects from the bone apposition surface and longitudinally extends between the opposing ends of the body.
162 Citations
24 Claims
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1. A trochlear groove implant for articulating with a patella, the trochlear groove implant comprising:
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a body having a first side with an articular surface, an opposing second side with a bone apposition surface, and a substantially uniform thickness between the articular surface and the bone apposition surface such that, at all locations at least 2 mm in from a perimeter edge of the body, the thickness of the body between the articular surface and the bone apposition surface does not vary by more than 20%, the articular surface and the bone apposition surface each extending between a proximal end and an opposing distal end of the body; an elongated channel recessed on the first side of the body and longitudinally extending between the proximal end and the opposing distal end of the body, at least a first portion of the articular surface having a substantially smooth convex curvature extending between the proximal end and the distal end of the body, a second portion of the articular surface being at least one of flat and convexly curved in a direction transverse to the elongated channel, wherein the patella rides both in the elongated channel and against the second portion of the articular surface during normal articulation; and an elongated ridge outwardly projecting on the second side of the body and longitudinally extending between the proximal end and the opposing distal end of the body, at least a portion of the bone apposition surface having a substantially smooth concave curvature extending between the proximal end and the distal end of the body. - 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)
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24. A trochlear groove implant for articulating with a patella, the trochlear groove implant comprising:
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a body having a first side with an articular surface, an opposing second side with a bone apposition surface, a proximal end, an opposing distal end, a lateral side, a medial side, and a perimeter edge, the articular surface of the body having a centroidal location, a maximum radius extending from the centroidal location to the perimeter edge, and a minimum radius extending from the centroidal location to the perimeter edge, the minimum radius not being less than 80% of the maximum radius; an elongated channel recessed on the first side of the body and longitudinally extending between the proximal end and the opposing distal end of the body, at least a portion of the articular surface having a substantially smooth convex curvature extending between the proximal end and the distal end of the body, the elongated channel having a bottom that is substantially centrally located between the lateral side and the medial side of the body; and an elongated ridge outwardly projecting on the second side of the body and longitudinally extending between the proximal end and the opposing distal end of the body, at least a portion of the bone apposition surface having a substantially smooth concave curvature extending between the proximal end and the distal end of the body.
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Specification