Reinforced bone graft substitutes
First Claim
1. An interbody fusion spacer, comprising:
- a body having an outer surface and a height approximating the height of a human disc space, said body composed of a porous, biocompatible ceramic material for permitting tissue ingrowth therethrough; and
a reinforcing sleeve disposed around said outer surface of said body, said sleeve including a material relatively stronger under compression than said porous, biocompatible ceramic material; and
said reinforcing sleeve having an inner surface defining a chamber, said chamber having an inner dimension that is slightly smaller than said body so as to engage said sleeve to said body.
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0 Petitions
Accused Products
Abstract
One embodiment of a spinal spacer 10 includes a body 11 sized and configured for engagement between adjacent vertebrae V. The body 11 includes two opposite faces 12, 14 and an outer surface 13 between the two faces 12, 14. In one embodiment, the body 11 includes deactivated bone material in synergistic combination with a bone growth factor. A sleeve 15 is disposed around the outer surface 13 of the body 11. The sleeve 15 is composed of a second material which is relatively stronger under compressive loads than the biocompatible material of the body 11. Also provided is a plurality of apertures 16 through the sleeve 15 in communication with the outer surface 13 of the body 11 for bone ingrowth. Means for attaching the sleeve to the endplates of adjoining vertebral bodies are also provided.
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Citations
36 Claims
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1. An interbody fusion spacer, comprising:
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a body having an outer surface and a height approximating the height of a human disc space, said body composed of a porous, biocompatible ceramic material for permitting tissue ingrowth therethrough; and a reinforcing sleeve disposed around said outer surface of said body, said sleeve including a material relatively stronger under compression than said porous, biocompatible ceramic material; and said reinforcing sleeve having an inner surface defining a chamber, said chamber having an inner dimension that is slightly smaller than said body so as to engage said sleeve to said body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An interbody fusion device, comprising:
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a body having an outer surface and a height approximating the height of a human disc space, said body including a porous, biocompatible, biodegradable material for permitting tissue ingrowth therethrough; and a sleeve engaged to said outer surface of said body, said sleeve including a material relatively stronger under compressive loads than said biocompatible material and including an inner surface for contacting said outer surface of said body, said inner surface of said sleeve defining a chamber, said sleeve being formed of a temperature responsive material such that said chamber has a first inner dimension that is slightly larger than an outer dimension of said body when said sleeve is in a heated state to slidably receive said body therein, and said chamber having a second inner dimension that is slightly smaller than said body when said sleeve is in a cooled state to thereby clamp said body therein.
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29. An interbody fusion spacer, comprising:
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a body having an outer surface and a height approximating the height of a human disc space, said body composed of a porous, biocompatible material for permitting tissue ingrowth therethrough; and a reinforcing sleeve clamped around said outer surface of said body, said sleeve including a material relatively stronger under compression than said porous, biocompatible material. - View Dependent Claims (30, 31, 33, 34, 35)
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32. A spinal implant for engagement between vertebrae, comprising:
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a monolithic body having two opposite faces and an outer surface disposed between said two faces, said body including a porous, biocompatible material for permitting tissue ingrowth therethrough, said body being sized and configured for engagement between two vertebrae; a sleeve disposed around said outer surface of said body, said sleeve including a second material relatively stronger under compressive loads than said porous, biocompatible material; said sleeve including an inner surface for contacting said outer surface of said body, said inner surface of said sleeve defining a chamber; and said chamber having an inner dimension that is slightly smaller than said body so as to engage said sleeve to said body.
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36. An interbody fusion spacer, comprising:
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a body having an outer surface and a height approximating the height of a human disc space, said body composed of a porous, biocompatible ceramic material for permitting tissue ingrowth therethrough; and a reinforcing sleeve engaged to said outer surface of said body, said sleeve including a material relatively stronger under compression than said porous, biocompatible ceramic material; said sleeve including an inner surface for contacting said outer surface of said body, said inner surface of said sleeve defining a chamber; said sleeve being formed of a temperature responsive material such that said chamber has a first inner dimension that is slightly larger than an outer dimension of said body when said sleeve is in a heated state to slidably receive said body therein; and said chamber having a second inner dimension that is slightly smaller than said body when said sleeve is in a cooled state to thereby clamp said body therein.
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Specification