Articular Implants Providing Lower Adjacent Cartilage Wear
Disclosed herein are methods and devices for repairing articular surfaces. The articular surface repairs are customizable or highly selectable by patient and geared toward providing optimal fit and function.
1 . A method of securing an articular resurfacing implant to a surface of a joint including adjacent articular cartilage, comprising:
providing an articular resurfacing implant having a body including a superior surface for facing an opposing articular surface of the joint, an inferior surface for facing bone, and a peripheral edge having a portion for abutting adjacent articular cartilage, wherein the portion of the peripheral edge for abutting adjacent articular cartilage has an inward cant;
preparing the implantation site of the joint surface to receive the implant; and
securing the implant to the prepared implant site, wherein the portion of the peripheral edge for abutting adjacent articular cartilage is inserted under the adjacent articular cartilage.
2 . The method according to claim 1 , further comprising inserting a section of the peripheral edge for abutting adjacent articular cartilage in subchondral bone.
3 . The method of claim 1 , wherein the preparation of the implantation site includes milling a groove in the subchondral bone to receive the portion of the peripheral edge for abutting adjacent articular cartilage.
4 . The method of claim 1 , wherein the inferior surface of the implant substantially conforms to the joint surface comprising the implantation site.
5 . The method of claim 1 , wherein the inferior surface of the implant substantially conforms to uncut subchondral bone of the joint surface comprising the implantation site.
6 . The method of claim 1 , wherein the implant has a curvature and thickness similar to that of adjacent articular cartilage.
7 . The method of claim 1 , wherein the inferior surface of the implant further comprises an anchor for securing the implant.
8 . The method of claim 7 , wherein the anchor is selected from the group consisting of keels, pegs, nubs, rods, ridges, pins, cross-members, lugs, teeth and protrusions.
9 . The method of claim 1 , wherein the implant body comprises polymer(s), ceramic(s), metal(s) and/or ceramic-metal composite(s).
10 . The method of claim 1 , wherein at least one of the inner surface and the margins of the portion of the peripheral edge for abutting adjacent articular cartilage is at least partially derived from patient-specific data.
11 . The implant of claim 10 , wherein the patient-specific data is obtained from an image of the joint.
12 . The method of claim 1 , wherein the implant has a thickness of about 1 to 10 mm.
13 . The method of claim 1 , wherein the implant is for a hip, knee, ankle, shoulder, elbow or wrist.
14 . The method of claim 1 , wherein the implant is a uni-, bi- or tricompartmental femoral resurfacing implant.