System and method for joint resurface repair
First Claim
1. An implant for replacing a portion of an articular surface of a bone comprising:
- first, second, and third segments each comprising a truncated, generally circular perimeter having a center corresponding to a center of a first, second, and a third generally circular excision site formed in said articular surface, respectively, wherein said second and said third segments partially overlap said first segment on opposing ends of said first segment, said first, said second, and said third segments comprise a bone contacting surface and a load bearing surface, said load bearing surface comprising an anterior-posterior (AP) curvature and a medial lateral (ML) curvature, wherein said AP curvature comprises at least two tangential curves of said portion of said articular surface of said bone, said tangential curves having different radii of curvature.
1 Assignment
0 Petitions
Accused Products
Abstract
An implant comprising a first, second, and third segment wherein the second and third segments partially overlap the first segment and define a load bearing surface comprising an anterior-posterior (AP) curvature including at least two tangential curves of the portion of the articular surface of the femoral condyle, the tangential curves having different radii of curvature. A drill guide comprises a body portion including a first, second and third bushing spaced along the body portion to establish a first, second and third axes, respectively. Each axis may be substantially normal to the articular surface at three different points along a curvature of the articular surface comprising the two tangential curves. A measuring device comprises a housing defining a longitudinally passageway and an outrigger. A guide pin may be received in the longitudinal passageway and a measuring device determines how far the guide pin is in the passageway.
-
Citations
14 Claims
-
1. An implant for replacing a portion of an articular surface of a bone comprising:
first, second, and third segments each comprising a truncated, generally circular perimeter having a center corresponding to a center of a first, second, and a third generally circular excision site formed in said articular surface, respectively, wherein said second and said third segments partially overlap said first segment on opposing ends of said first segment, said first, said second, and said third segments comprise a bone contacting surface and a load bearing surface, said load bearing surface comprising an anterior-posterior (AP) curvature and a medial lateral (ML) curvature, wherein said AP curvature comprises at least two tangential curves of said portion of said articular surface of said bone, said tangential curves having different radii of curvature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
-
10. A method of forming an implant for replacing a portion of an articular surface extending across at least two tangential curves of a bone, said tangential curves having different radii of curvature, said method comprising:
-
establishing a reference axis extending substantially normal to a point of origin on said portion of said articular surface; establishing a reference plane that is parallel to a tangential plane extending through said point of origin on said articular surface; measuring a first distance between said reference plane and a first point on said articular surface at a distance R1 along an anterior-posterior (AP) curvature of said portion of said articular surface from said reference axis; measuring a second distance between said reference plane and a second point on said articular surface at a distance R2 along said AP curvature of said portion of said articular surface from said reference axis, wherein R1 is less than R2; and providing an implant comprising; first, second, and third segments each comprising a truncated, generally circular perimeter having a center corresponding to a center of a first, second and third generally circular excision site formed in said articular surface, respectively, wherein said second and said third segments partially overlap said first segment on opposing ends of said first segment, said first, said second, and said third segments comprise a bone contacting surface and a load bearing surface, said load bearing surface comprising an AP curvature and a ML curvature, wherein said AP curvature of said implant comprises said at least two tangential curves of said portion of said articular surface of said bone, said tangential curves having different radii of curvature. - View Dependent Claims (12, 13, 14)
-
Specification