Multipiece allograft implant
First Claim
1. An intervertebral implant for insertion between adjoining vertebra, said implant comprising:
- a three dimensional body including a superior surface sized and configured for contacting at least a portion of one of said adjacent vertebrae, and an inferior surface sized and configured for contacting at least a portion of said other of said adjacent vertebrae;
said three dimensional body further comprising;
a first part formed of cortical bone and a second part formed of cancellous bone, wherein said first and second parts are connected to one another, wherein substantially the entire superior and inferior surfaces of the first part comprises a plurality of teeth, and wherein at least one of said superior and inferior surfaces of said second part includes a first portion and a second portion, wherein said first portion includes a plurality of teeth and said second portion is substantially smooth, said toothed first portion of said second part defining a first surface area and said substantially smooth second portion of said second part defines a second surface area, said second surface area being greater than said first surface area;
wherein said substantially smooth superior and inferior surfaces of said second portion of said second part define an upper plane and a lower plane, respectively, said plurality of teeth formed on said superior and inferior surfaces of said first part having a tip portion, said tip portion being sized and configured to be at or below said upper and lower planes; and
wherein said first and second parts are connected by at least one dovetail joint, wherein said dovetail joint includes a male portion and a female portion, said male portion being receivable within said female portion, each of said first part and said second part further comprising at least one hole extending partially therethrough and receiving at least one pin to prevent said first part from moving with respect to said second part;
at least one of said holes passes through said male and female portions of said dovetail joint so that at least one of said pins passes through said dovetail joint to secure said first and second parts to one another, wherein said male portion of said dovetail joint is on said first part and said female portion of said dovetail joint is on said second part.
1 Assignment
0 Petitions
Accused Products
Abstract
An allogenic implant for use in intervertebral fusion is formed from two parts. The first part, composed of cortical bone, provides mechanical strength to the implant, allowing the proper distance between the vertebrae being treated to be maintained. The second part, composed of cancellous bone, is ductile and promotes the growth of new bone between the vertebrae being treated and the implant, thus fusing the vertebrae to the implant and to each other. The implant is sized and shaped to conform to the space between the vertebrae. Teeth formed on the superior and inferior surfaces of the implant prevent short-term slippage of the implant.
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Citations
18 Claims
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1. An intervertebral implant for insertion between adjoining vertebra, said implant comprising:
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a three dimensional body including a superior surface sized and configured for contacting at least a portion of one of said adjacent vertebrae, and an inferior surface sized and configured for contacting at least a portion of said other of said adjacent vertebrae;
said three dimensional body further comprising;a first part formed of cortical bone and a second part formed of cancellous bone, wherein said first and second parts are connected to one another, wherein substantially the entire superior and inferior surfaces of the first part comprises a plurality of teeth, and wherein at least one of said superior and inferior surfaces of said second part includes a first portion and a second portion, wherein said first portion includes a plurality of teeth and said second portion is substantially smooth, said toothed first portion of said second part defining a first surface area and said substantially smooth second portion of said second part defines a second surface area, said second surface area being greater than said first surface area; wherein said substantially smooth superior and inferior surfaces of said second portion of said second part define an upper plane and a lower plane, respectively, said plurality of teeth formed on said superior and inferior surfaces of said first part having a tip portion, said tip portion being sized and configured to be at or below said upper and lower planes; and wherein said first and second parts are connected by at least one dovetail joint, wherein said dovetail joint includes a male portion and a female portion, said male portion being receivable within said female portion, each of said first part and said second part further comprising at least one hole extending partially therethrough and receiving at least one pin to prevent said first part from moving with respect to said second part;
at least one of said holes passes through said male and female portions of said dovetail joint so that at least one of said pins passes through said dovetail joint to secure said first and second parts to one another, wherein said male portion of said dovetail joint is on said first part and said female portion of said dovetail joint is on said second part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An intervertebral implant for insertion between adjoining vertebra, said implant comprising:
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a three dimensional body including a superior surface sized and configured for contacting at least a portion of one of said adjacent vertebrae, and an inferior surface sized and configured for contacting at least a portion of said other of said adjacent vertebrae;
said three dimensional body further comprising;a first part formed of bone and a second part formed of bone; wherein said first and second parts are connected to one another by at least one dovetail joint, wherein said dovetail joint includes a male portion and a female portion, said female portion being sized and configured to receive said male portion, each of said first part and said second parts further comprising at least one hole extending partially therethrough and receiving at least one pin to prevent said first part from moving with respect to said second part;
at least one of said holes passes through said male and female portions of said dovetail joint so that at least one of said pins passes through said dovetail joint to secure said first and second parts to one another;wherein said first part is formed of cortical bone and said second part is formed of cancellous bone;
said male portion of said dovetail joint is on said first part and said female portion of said dovetail joint is on said second part;wherein substantially the entire superior and inferior surfaces of the first part comprises a plurality of teeth, wherein said superior and inferior surfaces of said second part includes a first portion and a second portion, wherein said superior and inferior surfaces of said first portion of said second part include a plurality of teeth and said second portion of said second part is substantially smooth;
said toothed first portion of said second part defines a first surface area and said substantially smooth second portion of said second part defines a second surface area, said second surface area being greater than said first surface area; andwherein said substantially smooth superior and inferior surfaces of said second portion of said second part define an upper plane and a lower plane, respectively, said plurality of teeth formed on said superior and inferior surfaces of said first part having a tip portion, said tip portion being sized and configured to be at or below said upper and lower planes. - View Dependent Claims (11, 12, 13)
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14. An intervertebral implant for insertion between adjoining vertebra, said implant comprising:
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a three dimensional body including a superior surface sized and configured for contacting at least a portion of one of said adjacent vertebrae, and an inferior surface sized and configured for contacting at least a portion of said other of said adjacent vertebrae;
said three dimensional body further comprising;a first part formed of cortical bone and a second part formed of cancellous bone, wherein said first part is connected to said second part, wherein substantially the entire superior and inferior surfaces of the first part comprises a plurality of teeth and wherein said superior and inferior surfaces of said second part includes a first portion and a second portion, wherein said superior and inferior surfaces of said first portion of said second part include a plurality of teeth and said second portion of said second part is substantially smooth; wherein said first and second parts are connected by a dovetail joint, wherein said dovetail joint includes a male portion and a female portion, said male portion being receivable with said female portion, each of said first part and said second parts further comprising a hole extending partially therethrough and receiving a pin to prevent said first part from moving with respect to said second part;
said holes passing through said male and female portions of said dovetail joint so that at least one of said pins passes through said dovetail joint to secure said first and second parts to one another, wherein said male portion of said dovetail joint is on said first part and said female portion of said dovetail joint is on said second part; andwherein said substantially smooth superior and inferior surfaces of said second portion of said second part define an upper plane and a lower plane, respectively, said plurality of teeth formed on said superior and inferior surfaces of said first part having a tip portion, said tip portion being sized and configured to be at or below said upper and lower planes. - View Dependent Claims (15, 16, 17, 18)
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Specification