Patent US6039762A successfully refreshed from Google Patents.
US6039762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced bone graft substitutes
Assignee: Warsaw Orthopedic Inc
•
Filing: 1997-06-11
•
Granted: 2000-03-21
•
Expires: 2017-06-11
Abstract
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.
Inventors
- 👤 William F. McKay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:01
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/36; A61L27/3604; A61L27/3608; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/4465; A61L27/02; A61L27/025; A61L27/04; A61L27/10; A61L27/12; A61L27/14; A61L27/22; A61L27/24; A61L27/28; A61L27/30; A61L27/306; A61L27/3641; A61L27/3645; A61L27/3654; A61L27/3658; A61L27/40; A61L27/42; A61L27/44; A61L27/50; A61L27/56; C; C08; C08L; C08L89/00; A61F2/442; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30133; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2002/30316; A61F2002/30535; A61F2002/30593; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30777; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/30878; A61F2002/30879; A61F2002/30904; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0015; A61F2230/0063; A61F2230/0069; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00035; A61F2310/00095; A61F2310/00125; A61F2310/00131; A61F2310/00137; A61F2310/00179; A61F2310/00293; A61F2310/00365; A61L2430/00; A61L2430/38; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/909
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
96 words
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.
Claim 2
Dependent Claim
96 words
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.
Claim 3
Dependent Claim
26 words
The spacer of claim 1 wherein said sleeve defines a plurality of apertures therethrough in communication with said outer surface of said body for bone ingrowth.
Claim 4
Dependent Claim
11 words
The spacer of claim 2 wherein said apertures are generally circular.
Claim 5
Dependent Claim
11 words
The spacer of claim 2 wherein said apertures are generally oval.
Claim 6
Dependent Claim
11 words
The spacer of claim 2 wherein said apertures are generally diamond-shaped.
Claim 7
Dependent Claim
11 words
The spacer of claim 2 wherein said apertures are generally rectangular.
Claim 8
Dependent Claim
101 words
The spacer of claim 1 wherein: said sleeve includes 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 has 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.
Claim 9
Dependent Claim
40 words
The spacer of claim 1 wherein said sleeve has a height less than a height of said outer surface to permit contact of said opposite faces with endplates of the corresponding vertebrae when the spacer is implanted between the vertebrae.
Claim 10
Dependent Claim
21 words
The spacer of claim 1, further comprising: attaching means for attaching said sleeve to the endplates of the adjacent vertebral bodies.
Claim 11
Dependent Claim
34 words
The spacer of claim 9 wherein: said sleeve includes an inferior end and a superior end; and said attaching means includes teeth disposed at said superior end and said inferior end of said sleeve.
Claim 12
Dependent Claim
35 words
The spacer of claim 9 wherein: said sleeve includes an inferior end and a superior end; and said attaching means includes roughened surfaces defined on said superior end and said inferior end of said sleeve.
Claim 13
Dependent Claim
17 words
The spacer of claim 1 wherein said body is cylindrical and said sleeve is a hollow cylinder.
Claim 14
Dependent Claim
26 words
The spacer of claim 1 wherein said opposite faces of said body each have a size and shape corresponding to the shape of a vertebral endplate.
Claim 15
Dependent Claim
19 words
The spacer of claim 1 wherein said sleeve has an outer shape approximating the shape of a vertebral endplate.
Claim 16
Dependent Claim
14 words
The spacer of claim 1 wherein said sleeve is composed of a metal material.
Claim 17
Dependent Claim
25 words
The spacer of claim 15 wherein said metal material includes a metal selected from the group consisting of tantalum, niobium, hafnium, tungsten and alloys thereof.
Claim 18
Dependent Claim
13 words
The spacer of claim 15 wherein said metal material is a tantalum foam.
Claim 19
Dependent Claim
36 words
The spacer of claim 15 wherein said sleeve is composed of a metal material including a metal selected from the group consisting of titanium, titanium-vanadium-aluminum alloy, cobalt-chromium alloy, cobalt-chromium-molybdenum alloy, cobalt-nickel-chromium-molybdenum alloy and biocompatible stainless steel.
Claim 20
Dependent Claim
15 words
The spacer of claim 18 wherein said biocompatible stainless steel is 316 LVM stainless steel.
Claim 21
Dependent Claim
11 words
The spacer of claim 15 wherein said metal material includes titanium.
Claim 22
Dependent Claim
19 words
The spacer of claim 1 wherein said spacer has an ASTM C-773 compressive strength of at least 7.1 MPa.
Claim 23
Dependent Claim
17 words
The spacer of claim 20 wherein said spacer has a compressive strength of at least 20 MPa.
Claim 24
Dependent Claim
17 words
The spacer of claim 21 wherein said spacer has a compressive strength of at least 40 MPa.
Claim 25
Dependent Claim
20 words
The spacer of claim 1 wherein said body has a kidney-shaped cross-section to conform to the shape of vertebral endplates.
Claim 26
Dependent Claim
25 words
The spacer of claim 1 wherein said body is configured to approximate a size and shape of a nucleus pulposus of a natural intervertebral disc.
Claim 27
Dependent Claim
14 words
The spacer of claim 1 wherein said ceramic material is a calcium phosphate ceramic.
Claim 28
Dependent Claim
15 words
The spacer of claim 1 wherein said ceramic material is a biphasic calcium phosphate ceramic.
Claim 29
Dependent Claim
154 words
An interbody fusion device, comprising: 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.
Claim 30
Dependent Claim
154 words
An interbody fusion device, comprising: 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.
Claim 31
Dependent Claim
61 words
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 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.
Claim 32
Dependent Claim
61 words
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 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.
Claim 33
Dependent Claim
24 words
The spacer of claim 29, further comprising a therapeutically effective amount to stimulate bone growth of a bone growth factor dispersed within said body.
Claim 34
Dependent Claim
26 words
The spacer of claim 29 wherein said sleeve defines a plurality of apertures therethrough in communication with said outer surface of said body for bone ingrowth.
Claim 35
Dependent Claim
119 words
A spinal implant for engagement between vertebrae, comprising: 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.
Claim 36
Dependent Claim
119 words
A spinal implant for engagement between vertebrae, comprising: 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.
Claim 37
Dependent Claim
12 words
The spacer of claim 29, wherein said body is composed of bone.
Claim 38
Dependent Claim
13 words
The spacer of claim 29, wherein said porous, biocompatible material comprises biocompatible ceramic.
Claim 39
Dependent Claim
34 words
The spacer of claim 33, wherein said bone has been processed to remove associated non-collagenous bone proteins, said bone containing native collagen materials and naturally associated bone minerals and substantially free from non-collagenous protein.
Claim 40
Dependent Claim
158 words
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 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.
Claim 41
Dependent Claim
158 words
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 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.
References Cited (Backward Citations)
US4309488A
Cited
US4654314A
Cited
US4626392A
Cited
US4976738A
Cited
US4722870A
Cited
US4636217A
Cited
US4687675A
Cited
US4599086A
Cited
US5002583A
Cited
US4820305A
Cited
US4917703A
Cited
US4834757A
Cited
US4878915A
Cited
US4714469A
Cited
US5219363A
Cited
US5015247A
Cited
US5776199A
Cited
US4961740A
Cited
US5026373A
Cited
US4961740B1
Cited
US5055104A
Cited
US5152791A
Cited
US5330826A
Cited
US5306302A
Cited
US5147402A
Cited
US5306307A
Cited
US5306303A
Cited
US5282861A
Cited
US5346492A
Cited
US5888224A
Cited
US5514180A
Cited
US5443515A
Cited
US5782919A
Cited
US5702449A
Cited
US5755798A
Cited
US5865845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-21 | 2003-09-20 | 2004-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-21 | 2007-09-20 | 2008-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-21 | 2011-09-20 | 2012-03-21 | $7700.00 | Window Closed / Lapsed |