System and method for joint resurface repair
AssigneeArthrosurface Incorporated
InventorSteven W. Ek
Life of this patent
Estimating the term…
Abstract
An implant for installation into a portion of an articular surface includes a protrusion configured to cover an un-excised portion of articular surface proximate to the implant. Another implant may form a cavity to allow the un-excised portion of articular surface to remodel over a perimeter edge of the implant. The implant may also include indentations such as grooves to promote articular cartilage remodeling over a portion of the load bearing surface of the implant. An elongated or non-round implant is also provided having two opposing concentric arcuate shaped sides, as well as a method to seat such an implant in an articular surface. A method for seating an implant without cutting articular cartilage is also provided.
Claims66
An implant, comprising:
- a bone-facing distal surface;
- a proximal surface;
- and
- a protrusion formed by an extension of said bone-facing distal surface and said proximal surface.
An implant for installation into a portion of an articular surface, said implant comprising:
- a bone-facing distal surface configured to mate with an implant site created by excising a portion of said articular surface;
- a proximal surface having a contour based on an original surface contour of said excised portion of said articular surface;
- and
- a cavity configured to allow an un-excised portion of said articular surface proximate to said implant to remodel over a perimeter edge of said proximal surface.
An implant for installation into a portion of an articular surface having an anterior portion, a posterior portion, a medial portion and a lateral portion, said implant comprising:
- a bone-facing distal surface configured to mate with an implant site created by excising a portion of said articular surface;
- and
- a proximal surface having a contour based on an original surface contour of said excised portion of said articular surface, and at least two side surfaces each having a concentric arcuate shape with a common center, wherein said implant has an elongate arcuate geometric shape.
A method for replacing a portion of an articular surface of bone, said method comprising:
- establishing a working axis substantially normal to an articular surface of bone;
- excising a portion of said articular surface adjacent to said axis, thereby creating an implant site, said implant site having a first and second opposing arcuate shaped sides;
- and
- installing an implant to said implant site.
A method of replacing a portion of an articular surface of bone, said method comprising:
- locating an existing defect in said articular surface;
- establishing a working axis substantially normal to said articular surface and substantially centered with said existing defect;
- excising a portion of said articular surface adjacent to said axis, thereby creating an implant site;
- and
- installing an implant in said implant site, wherein at least a portion of said existing defect is exposed around a perimeter of said implant.
An implant for installation into a portion of an articular surface, said implant comprising:
- a bone-facing distal surface configured to mate with an implant site created by excising a portion of said articular surface;
- a proximal surface having a contour based on an original surface contour of said excised portion of said articular surface;
- and
- at least one arcuate shaped side surface configured to abut an edge of said excised portion of said articular surface, said arcuate shaped side surface having a radial extension configured to cover an un-excised portion of said articular surface proximate to said implant.
A method for replacing a portion of an articular surface of bone, said method comprising:
- establishing a working axis substantially normal to an articular surface of bone, said articular surface having a medial side and lateral side defining a width of said articular surface;
- excising a portion of said articular surface adjacent to said axis, thereby creating an implant site, wherein said excising is performed using a cutting tool that rotates about said axis, said cutting tool having a circular blade portion, said circular blade portion having a diameter greater than said width of said articular surface;
- and
- installing an implant to said implant site.
An implant for installation into a portion of an articular surface, said implant comprising:
- a bone-facing distal surface configured to mate with an implant site created by excising a portion of said articular surface;
- and
- a proximal surface having a contour based on an original surface contour of said excised portion of said articular surface, wherein said proximal surface has at least one indentation formed in said proximal surface configured to promote remodeling of articular cartilage over a portion of said proximal surface of said implant once seated.
An implant for installation into a portion of an articular surface, said implant comprising:
- a bone-facing distal surface configured to mate with an implant site created by excising a portion of said articular surface;
- and
- a proximal surface having a contour based on an original surface contour of said excised portion of said articular surface, wherein said proximal surface is adapted to promote remodeling of articular cartilage over at least a portion of said proximal surface.
Dependencies are inferred from the claim text.