Compliant anti-resorption implant
First Claim
Patent Images
1. An orthopedic implant comprising:
- a shell region having an outer articulation surface; and
an intermediate region having a bone interface, said intermediate region having different mechanical properties than the shell region;
wherein a first cross-sectional area of an anterior portion of the shell region taken perpendicular to the outer articulation surface at the anterior portion is substantially equal to the sum of (i) a second cross-sectional area of a medial condyle portion of the shell region taken perpendicular to the outer articulation surface at the medial condyle portion and (ii) a third cross-sectional area of a lateral condyle portion of the shell region taken perpendicular to the outer articulation surface at the lateral condyle portion.
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Accused Products
Abstract
Systems, devices, and methods are described for providing orthopedic implants that reduces the negative effects of stress shielding on surrounding bone structure. The orthopedic implants are comprised of two portions, a shell portion that forms an articulation interfaces and an intermediate portion that forms a bone interface. The shell portion is designed to reduce absorption of articulation forces and evenly distribute incident forces to the intermediate portion. The intermediate portion is designed to form a strong interface with native bone and transmit forces from the shell into the bone.
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Citations
25 Claims
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1. An orthopedic implant comprising:
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a shell region having an outer articulation surface; and an intermediate region having a bone interface, said intermediate region having different mechanical properties than the shell region; wherein a first cross-sectional area of an anterior portion of the shell region taken perpendicular to the outer articulation surface at the anterior portion is substantially equal to the sum of (i) a second cross-sectional area of a medial condyle portion of the shell region taken perpendicular to the outer articulation surface at the medial condyle portion and (ii) a third cross-sectional area of a lateral condyle portion of the shell region taken perpendicular to the outer articulation surface at the lateral condyle portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An orthopedic implant comprising:
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a shell region having an outer articulation surface; and an intermediate region having a bone interface, said intermediate region having different mechanical properties than the shell region; wherein the shell region further comprises strengthening ribs, wherein a first strengthening rib is disposed at a junction between a medial condylar region and a lateral condylar region of the shell region, wherein the first strengthening rib includes a first portion, a second portion, and a curved portion connecting the first portion and the second portion, and wherein the first portion extends in a medial-lateral direction at the junction, and the second portion extends inferiorly-superiorly at one of the medial and lateral condylar regions. - View Dependent Claims (24, 25)
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Specification