System and method for joint resurface repair
First Claim
1. 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.
1 Assignment
0 Petitions
Accused Products
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.
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Citations
66 Claims
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1. An implant, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implant for installation into a portion of an articular surface, said implant comprising:
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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. - View Dependent Claims (13, 14, 15, 16, 17)
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18. 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:
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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. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for replacing a portion of an articular surface of bone, said method comprising:
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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. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
covering an un-excised portion of said articular surface proximate to said implant.
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34. The method of claim 27, wherein said implant comprises:
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a bone-facing distal surface configured to mate with said implant site;
a proximal surface having a contour based on an original surface contour of said excised portion of said articular surface; and
first and second opposed side surfaces, said first and second opposed side surfaces being arcuate and configured to mate with said first and second sides of said implant site.
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35. The method of claim 34, wherein said implant further comprises a third and fourth opposed side surface.
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36. The method of claim 34, wherein said implant further comprises a protrusion configured to cover an un-excised portion of said articular surface proximate to said implant.
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37. The method of claim 36, wherein said protrusion extends radially from said first and second arcuate shaped side surfaces of said implant.
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38. A method of replacing a portion of an articular surface of bone, said method comprising:
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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. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
a bone-facing distal surface configured to mate with said implant site;
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.
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45. The method of claim 44, wherein said proximal surface has a first section substantially shaped to match said original surface contour of said excised portion and a second section depressed relative to said first section, said second section forming a floor of said cavity.
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46. An implant for installation into a portion of an articular surface, said implant comprising:
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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. - View Dependent Claims (47, 48, 49)
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50. A method for replacing a portion of an articular surface of bone, said method comprising:
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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.
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51. An implant for installation into a portion of an articular surface, said implant comprising:
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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. - View Dependent Claims (52, 53, 54)
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55. An implant for installation into a portion of an articular surface, said implant comprising:
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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. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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Specification