US5658337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intervertebral fusion implant
Assignee: Zimmer Spine Inc
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Filing: 1996-04-17
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Granted: 1997-08-19
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Expires: 2016-04-17
Abstract
Abstract A intervertebral fusion implant includes first and second bearing surfaces which oppose cortical bone upon insertion of the implant into a bore formed between two vertebrae. The implant includes first and second ridges which extend from the bearing surface. The ridges extend through the cortical bone into cancellous bone. The ridges are provided with openings formed through the ridges. The openings are in communication with the interior of the implant.
Inventors
- 👤 Douglas W. Kohrs
- 👤 Hansen A. Yuan
- 👤 David W. Stassen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:51
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/447; A61F2/46; A61F2/4603; A61F2/4611; A61F2/442; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30146; A61F2002/30153; A61F2002/30199; A61F2002/30261; A61F2002/30316; A61F2002/30535; A61F2002/30593; A61F2002/30604; A61F2002/30616; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30777; A61F2002/30784; A61F2002/30785; A61F2002/30789; A61F2002/3085; A61F2002/30858; A61F2002/30868; A61F2002/30878; A61F2002/30879; A61F2002/30883; A61F2002/448; A61F2002/4625; A61F2002/4627; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0019; A61F2230/0063; A61F2230/0082
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
93 words
An implant for facilitating intervertebral fusion between opposing vertebrae, said implant comprising: a hollow implant body having a generally parallelepiped configuration with longitudinal edges; a plurality of generally linear and separate anchor segments disposed at said longitudinal edges and said anchor segments spaced from one another by unthreaded areas on surfaces of said body between said longitudinal edges; said anchor segments cooperating to define a helical pattern; said body having at least two diametrically opposed sides with openings formed through each of said sides in communication with an interior of said implant body.
Claim 2
Dependent Claim
93 words
An implant for facilitating intervertebral fusion between opposing vertebrae, said implant comprising: a hollow implant body having a generally parallelepiped configuration with longitudinal edges; a plurality of generally linear and separate anchor segments disposed at said longitudinal edges and said anchor segments spaced from one another by unthreaded areas on surfaces of said body between said longitudinal edges; said anchor segments cooperating to define a helical pattern; said body having at least two diametrically opposed sides with openings formed through each of said sides in communication with an interior of said implant body.
Claim 3
Dependent Claim
120 words
An implant for facilitating intervertebral fusion between opposing vertebrae; said implant comprising: an implant body having a first bearing surface and a second bearing surface, each of said first and second bearing surfaces extending generally parallel to one another and on opposite sides of a longitudinal axis of said body; a first ridge extending from said first bearing surface; a second ridge extending from said second bearing surface; a first opening formed through said first ridge in communication with said interior; a second opening formed through said second ridge in communication with said interior; and a plurality of anchor segments disposed on opposite sides of said first and second ridges with said plurality of anchor segments defining a helix pattern.
Claim 4
Dependent Claim
120 words
An implant for facilitating intervertebral fusion between opposing vertebrae; said implant comprising: an implant body having a first bearing surface and a second bearing surface, each of said first and second bearing surfaces extending generally parallel to one another and on opposite sides of a longitudinal axis of said body; a first ridge extending from said first bearing surface; a second ridge extending from said second bearing surface; a first opening formed through said first ridge in communication with said interior; a second opening formed through said second ridge in communication with said interior; and a plurality of anchor segments disposed on opposite sides of said first and second ridges with said plurality of anchor segments defining a helix pattern.
Claim 5
Dependent Claim
58 words
The implant according to claim 2 wherein said first and second bearing surfaces and first and second ridges are sized for said first and second bearing surface to oppose cortical bone of end plates of opposing vertebrae and with said ridges sized to extend beyond said cortical bone and be in communication with cancellous bone of said vertebrae.
Claim 6
Dependent Claim
20 words
The implant according to claim 2 comprising first and second side walls extending between said first and second bearing surfaces.
Claim 7
Dependent Claim
29 words
The implant according to claim 4 comprising first and second bores formed through said first and second side walls with first and second bores in communication with said interior.
Claim 8
Dependent Claim
16 words
The implant according to claim 4 wherein said side walls are concave along their longitudinal axis.
Claim 9
Dependent Claim
27 words
The implant according to claim 6 comprising first and second bores formed through said side walls with said first and second bores in communication with said interior.
Claim 10
Dependent Claim
54 words
The implant according to claim 7 wherein said implant is selected for placement within a bore formed between opposing vertebra with said bore having a predetermined radius, said anchor segments separated by valleys with a radial line from said longitudinal axis to said valleys being substantially equal to a said radius of said bore.
Claim 11
Dependent Claim
17 words
The implant according to claim 4 wherein said side walls are substantially solid throughout their surface area.
Claim 12
Dependent Claim
44 words
The implant according to claim 2 wherein said body is providing with a leading edge having a taper with a cross-sectional area of said body at said leading edge being smaller than a cross sectional area of said body away from said leading edge.
Claim 13
Dependent Claim
20 words
The implant according to claim 2 wherein said side walls and said bearing walls are concave along said longitudinal dimension.
Claim 14
Dependent Claim
17 words
The implant according to any of claims 2 or 1 wherein said anchor segments are thread segments.
Claim 15
Dependent Claim
127 words
An implant for facilitating intervertebral fusion between opposing vertebrae; said implant comprising: an implant body having a first bearing surface and a second bearing surface, each of said first and second bearing surfaces extending generally parallel to one another and on opposite sides of a longitudinal axis of said body; a first ridge extending from said first bearing surface; a second ridge extending from said second bearing surface; a first opening formed through said first ridge in communication with said interior; a second opening formed through said second ridge in communication with said interior; first and second side walls extending between said first and second bearing surfaces; said side walls are concave along their longitudinal axis; and said side walls are substantially solid through their surface area.
Claim 16
Dependent Claim
127 words
An implant for facilitating intervertebral fusion between opposing vertebrae; said implant comprising: an implant body having a first bearing surface and a second bearing surface, each of said first and second bearing surfaces extending generally parallel to one another and on opposite sides of a longitudinal axis of said body; a first ridge extending from said first bearing surface; a second ridge extending from said second bearing surface; a first opening formed through said first ridge in communication with said interior; a second opening formed through said second ridge in communication with said interior; first and second side walls extending between said first and second bearing surfaces; said side walls are concave along their longitudinal axis; and said side walls are substantially solid through their surface area.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-18 | 2001-02-17 | 2001-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-18 | 2005-02-17 | 2005-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-18 | 2009-02-17 | 2009-08-19 | $7700.00 | Window Closed / Lapsed |