Tibial resurfacing system and method
First Claim
1. An implant system comprising an implant for replacing only a portion of a patient'"'"'s articular surface of a tibial plateau of a tibial bone, said implant including:
- a load bearing surface having a contour based on a plurality of measurements taken of the removed portion of the articular surface corresponding to an implant site in the tibial plateau of the tibial bone; and
a bone facing surface including a first and a second truncated cylindrical protrusion extending along a length of two opposite lateral sides of said bone facing surface, respectively, said first and said second truncated cylindrical protrusion comprising arcs of circles and are defined by portions of a first and a second different cylindrical projection corresponding to said arcs of said circles,wherein the implant has a thickness extending between said load bearing surface and said bone facing surface that is less than a diameter of said circles and is configured such that the bone facing surface abuts against the tibial bone within the implant site and the load bearing surface is substantially continuous with the articular surface surrounding the removed portion of articular surface when the implant is received in the implant site; and
wherein portions of the load bearing surface opposite the bone facing surface of said first and said second truncated cylindrical protrusion are disposed within said first and said second different cylindrical projection.
1 Assignment
0 Petitions
Accused Products
Abstract
An implant resection system for preparing an implant site to replace a defect in an articular surface of a first bone includes a guide configured to be coupled generally perpendicular to the first bone proximate to the defect. The guide includes a body portion defining a plurality of excision passageways. The excision passageways each define a generally cylindrical core pathway configured to extend generally perpendicular to the first bone which partially overlaps with an adjacent generally cylindrical core pathway. A projection associated with each of the plurality of the generally cylindrical core pathways defines a truncated cylindrical excision site extending through a portion of the articular surface. Each truncated cylindrical excision site partially overlaps with at least one adjacent truncated cylindrical excision site.
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Citations
21 Claims
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1. An implant system comprising an implant for replacing only a portion of a patient'"'"'s articular surface of a tibial plateau of a tibial bone, said implant including:
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a load bearing surface having a contour based on a plurality of measurements taken of the removed portion of the articular surface corresponding to an implant site in the tibial plateau of the tibial bone; and a bone facing surface including a first and a second truncated cylindrical protrusion extending along a length of two opposite lateral sides of said bone facing surface, respectively, said first and said second truncated cylindrical protrusion comprising arcs of circles and are defined by portions of a first and a second different cylindrical projection corresponding to said arcs of said circles, wherein the implant has a thickness extending between said load bearing surface and said bone facing surface that is less than a diameter of said circles and is configured such that the bone facing surface abuts against the tibial bone within the implant site and the load bearing surface is substantially continuous with the articular surface surrounding the removed portion of articular surface when the implant is received in the implant site; and wherein portions of the load bearing surface opposite the bone facing surface of said first and said second truncated cylindrical protrusion are disposed within said first and said second different cylindrical projection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An implant system comprising an implant for replacing only a portion of a patient'"'"'s articular surface of a tibial plateau of a tibial bone, said implant including:
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a load bearing surface having a contour based on a plurality of measurements taken of the removed portion of the articular surface corresponding to an implant site in the tibial plateau of the tibial bone; and a bone facing surface including a first and a second truncated cylindrical protrusion extending along a length of said bone facing surface and defining a first and a second generally opposite lateral side of said bone facing surface, said first and said second truncated cylindrical protrusion comprising arcs of circles and are defined by portions of a first and a second different cylindrical projection corresponding to said arcs of said circles; wherein said implant includes a “
D”
shaped cross-section and has a thickness extending between said load bearing surface and said bone facing surface that is less than a diameter of said circles and is configured such that the bone facing surface abuts against the tibial bone within the implant site and the load bearing surface is substantially continuous with the articular surface surrounding the removed portion of articular surface when the implant is received in the implant site; andwherein portions of the load bearing surface opposite the bone facing surface of said first and said second truncated cylindrical protrusion are disposed within said first and said second different cylindrical projection.
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21. An implant system comprising an implant for replacing only a portion of a patient'"'"'s articular surface of a patient'"'"'s tibia bone, said implant including:
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a load bearing surface having a contour substantially corresponding to a contour of only the removed portion of the articular surface corresponding to an implant site in the bone; and a bone facing surface including a first and a second truncated cylindrical protrusion from said load bearing surface along a length of said bone facing surface and defining a first and a second generally opposite lateral side of said bone facing surface, respectively, said first and said second truncated cylindrical protrusion comprising arcs of circles and are defined by portions of a first and a second different cylindrical projection corresponding to said arcs of said circles; wherein said implant includes a modified “
D”
shaped cross-section including a notched region corresponding to the posterior face of the tibia bone which is not removed proximate to a nerve bundle and the implant has a thickness extending between said load bearing surface and said bone facing surface that is less than a diameter of said circles and is configured such that the bone facing surface abuts against the bone within the implant site and the load bearing surface is substantially continuous with the articular surface surrounding the removed portion of articular surface when the implant is received in the implant site; andwherein portions of the load bearing surface opposite the bone facing surface of said first and said second truncated cylindrical protrusion are disposed within said first and said second different cylindrical projection.
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Specification