TWO PIECE CANCELLOUS CONSTRUCT FOR CARTILAGE REPAIR
First Claim
1. A composite construct for cartilage and bone repair, said construct being adapted for insertion into a defect site and comprising:
- a cap member formed from an integral piece of allogenic bone shaped to form a stem having a longitudinal axis, which defines an axial direction, and a top section attached to one end of said stem and extending radially outward therefrom, said top section being substantially demineralized to thereby provide said top section with an elastic quality; and
a base member formed from an integral piece of mineralized, allogenic bone, said base member including a peripheral sidewall that is sized and shaped for insertion into the defect site, and a blind bore extending in said axial direction from one end of said base member toward an opposite end thereof, said one end of said base member including an annular surface extending radially between said peripheral sidewall and said blind bore, said blind bore being sized and shaped so as to receive said stem of said cap member, and said annular surface being sized and shaped so as to support said top section of said cap member when said stem of said cap member is received within said blind bore of said base member.
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Accused Products
Abstract
The invention is directed toward a cartilage repair assembly comprising a shaped allograft two piece construct with a demineralized cancellous cap and a mineralized cylindrical base member defining a blind bore with a through-going transverse bore intersecting the blind bore. The demineralized cancellous cap has a cylindrical top portion and a smaller diameter cylindrical stem extending away from the top portion which fits into the blind bore of the mineralized base member. The cap stem defines a transverse through-going bore which is aligned with the through-going bore of the base member to receive a cylindrical cortical pin holding the cap within the base member. The shaped structure is dimensioned to fit in a drilled bore in a cartilage defect area so that the assembly engages the side wall of the drilled bore in an interference fit.
98 Citations
1 Claim
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1. A composite construct for cartilage and bone repair, said construct being adapted for insertion into a defect site and comprising:
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a cap member formed from an integral piece of allogenic bone shaped to form a stem having a longitudinal axis, which defines an axial direction, and a top section attached to one end of said stem and extending radially outward therefrom, said top section being substantially demineralized to thereby provide said top section with an elastic quality; and a base member formed from an integral piece of mineralized, allogenic bone, said base member including a peripheral sidewall that is sized and shaped for insertion into the defect site, and a blind bore extending in said axial direction from one end of said base member toward an opposite end thereof, said one end of said base member including an annular surface extending radially between said peripheral sidewall and said blind bore, said blind bore being sized and shaped so as to receive said stem of said cap member, and said annular surface being sized and shaped so as to support said top section of said cap member when said stem of said cap member is received within said blind bore of said base member.
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Specification