Cartilage Implants and Methods of Use
First Claim
1. ) A cartilage implant comprising:
- an articular end having an oval perimeter, a convex upper face, and a concave lower face, the convex upper face having a first circular pitch radius and a first circular roll radius, the concave lower face having a first surface comprising a second circular pitch radius and a second circular roll radius, and at least two second surfaces both external to the first surface and each other and both tangent to the first surface, each second surface having a third circular pitch radius and a third circular roll radius, the convex upper face blending into a rim, wherein at least a first and second portion of the rim extends at least a first distance along the vertical axis and a third and fourth portion of the rim tapers inward along the vertical axis, the rim blending into the concave lower face; and
a stem extending from the concave lower face away from the convex upper face, the stem having an oval shaped perimeter in planes perpendicular to the vertical axis.
1 Assignment
0 Petitions
Accused Products
Abstract
Cartilage implant devices having oval articular ends are provided. The articular ends have a convex upper face and a concave lower face. The convex upper face has a first circular pitch radius and a first circular roll radius. The concave lower face has a first surface comprising a second circular pitch radius and a second circular roll radius, and at least two second surfaces each second surface having a third circular pitch radius and a third circular roll radius. The convex upper face blends into a rim, wherein at least a first and second portion of the rim extends at least a first distance along the vertical axis and a third and fourth portion of the rim tapers inward along the vertical axis, the rim blends into the concave lower face. The implant devices further have a stem extending from the concave lower face away from the convex upper face.
75 Citations
12 Claims
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1. ) A cartilage implant comprising:
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an articular end having an oval perimeter, a convex upper face, and a concave lower face, the convex upper face having a first circular pitch radius and a first circular roll radius, the concave lower face having a first surface comprising a second circular pitch radius and a second circular roll radius, and at least two second surfaces both external to the first surface and each other and both tangent to the first surface, each second surface having a third circular pitch radius and a third circular roll radius, the convex upper face blending into a rim, wherein at least a first and second portion of the rim extends at least a first distance along the vertical axis and a third and fourth portion of the rim tapers inward along the vertical axis, the rim blending into the concave lower face; and a stem extending from the concave lower face away from the convex upper face, the stem having an oval shaped perimeter in planes perpendicular to the vertical axis. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12)
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4. ) The cartilage implant of claim 13, wherein the maximum roll radius of the first surface of the concave lower face is bounded by an angle selected from the group consisting of from about 5 degrees to about 25 degrees and from about 10 degrees to about 20 degrees.
Specification