US5895426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusion implant device and method of use
Assignee: Warsaw Orthopedic Inc
•
Filing: 1996-09-06
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Granted: 1999-04-20
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Expires: 2016-09-06
Abstract
Abstract An intervertebral prosthesis includes a bone graft implant member dimensioned for insertion within an intervertebral space defined between adjacent vertebrae and having at least first and second longitudinal sections with respective first and second cross-sectional dimensions. The first cross-sectional dimension of the first implant section is greater than the second cross-section dimension of the second implant section to define a stepped region having a retaining surface. Consequently, upon insertion of the implant member within a generally correspondingly dimensioned receiving bed formed within the adjacent vertebrae, the retaining surface facilitates securement therewithin by corresponding engagement with surfaces of the receiving bed. A method for fusion of adjacent vertebrae utilizing the prosthesis is also disclosed.
Inventors
- 👤 Nelson Scarborough
- 👤 John W. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:35
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1671; A61B17/1637; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/44; A61F2/4455; A61F2/446; A61F2/46; A61F2/4644; A61B17/02; A61B17/025; A61B2017/0256; A61F2002/2817; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30233; A61F2002/30261; A61F2002/30266; A61F2002/30316; A61F2002/30535; A61F2002/30593; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/3082; A61F2002/30827; A61F2002/30828; A61F2002/448; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2230/0082; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00179; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/909; Y10S606/91; Y10S606/913
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
107 words
An intervertebral prosthesis comprising an implant member dimensioned for insertion within a receiving bed formed in opposed faces of adjacent vertebrae, said implant member defining a longitudinal axis and having a non-threaded outer surface and at least first and second longitudinal sections with respective first and second cross-sectional dimensions, said first cross-sectional dimension being greater than said second cross-sectional dimension to define a retaining surface of said implant member, said retaining surface being positioned, dimensioned and configured such that upon insertion of said implant member into the receiving bed between the vertebrae, said retaining surface facilitates securement therewithin by corresponding engagement with surfaces of the adjacent vertebrae.
Claim 2
Dependent Claim
107 words
An intervertebral prosthesis comprising an implant member dimensioned for insertion within a receiving bed formed in opposed faces of adjacent vertebrae, said implant member defining a longitudinal axis and having a non-threaded outer surface and at least first and second longitudinal sections with respective first and second cross-sectional dimensions, said first cross-sectional dimension being greater than said second cross-sectional dimension to define a retaining surface of said implant member, said retaining surface being positioned, dimensioned and configured such that upon insertion of said implant member into the receiving bed between the vertebrae, said retaining surface facilitates securement therewithin by corresponding engagement with surfaces of the adjacent vertebrae.
Claim 3
Dependent Claim
16 words
The intervertebral prosthesis according to claim 1 wherein said implant member is generally circular in cross-section.
Claim 4
Dependent Claim
30 words
The intervertebral prosthesis according to claim 2 wherein said second longitudinal section defines a diameter ranging from about 50% to about 95% the diameter defined by said first longitudinal section.
Claim 5
Dependent Claim
16 words
The intervertebral prosthesis according to claim 1 wherein the implant member defines a single stepped region.
Claim 6
Dependent Claim
15 words
The intervertebral prosthesis according to claim 1 wherein said implant member includes multiple stepped regions.
Claim 7
Dependent Claim
16 words
The intervertebral prosthesis according to claim 1 wherein said implant member is a bone graft implant.
Claim 8
Dependent Claim
17 words
The intervertebral prosthesis according to claim 1 wherein said implant member comprises cancellous bone or cortical bone.
Claim 9
Dependent Claim
30 words
The intervertebral prosthesis according to claim 1 wherein said implant member comprises a material selected from the group consisting of titanium, titanium alloys, surgical steel, polymeric material and ceramic material.
Claim 10
Dependent Claim
108 words
An intervertebral prosthesis comprising an implant member of biocompatible material and being dimensioned for positioning in a receiving bed formed in opposed faces of adjacent vertebrae, said implant member including a non-threaded outer surface and first and second generally cylindrical sections, the first cylindrical section defining a diameter greater than a diameter defined by the second cylindrical section, the juncture of said first and second cylindrical sections defining a retaining ledge, the retaining ledge being positioned, dimensioned and configured such that upon insertion of said implant member between the adjacent vertebrae, the retaining ledge prevents movement of the implant member relative to the vertebrae thereby facilitating retainment therein.
Claim 11
Dependent Claim
108 words
An intervertebral prosthesis comprising an implant member of biocompatible material and being dimensioned for positioning in a receiving bed formed in opposed faces of adjacent vertebrae, said implant member including a non-threaded outer surface and first and second generally cylindrical sections, the first cylindrical section defining a diameter greater than a diameter defined by the second cylindrical section, the juncture of said first and second cylindrical sections defining a retaining ledge, the retaining ledge being positioned, dimensioned and configured such that upon insertion of said implant member between the adjacent vertebrae, the retaining ledge prevents movement of the implant member relative to the vertebrae thereby facilitating retainment therein.
Claim 12
Dependent Claim
25 words
The intervertebral prosthesis according to claim 8 wherein said first and second cylindrical sections are concentrically arranged about a longitudinal axis of said implant member.
Claim 13
Dependent Claim
16 words
The intervertebral prosthesis according to claim 8 wherein said implant member has a non-threaded exterior surface.
Claim 14
Dependent Claim
25 words
The intervertebral prosthesis according to claim 9 wherein said implant member defines anterior and posterior ends, said first cylindrical section disposed adjacent said anterior end.
Claim 15
Dependent Claim
14 words
The intervertebral prosthesis according to claim 8 wherein said implant member comprises cortical bone.
Claim 16
Dependent Claim
14 words
The intervertebral prosthesis according to claim 8 wherein said implant member comprises cancellous bone.
Claim 17
Dependent Claim
83 words
A vertebral interbody fusion device comprising a bone graft implant member dimensioned to span an intervertebral space between adjacent vertebrae, said implant member having a non-threaded outer surface and first and second longitudinal sections, with respective first and second cross-sectional dimensions, the juncture of said first and second longitudinal sections defining a retaining surface, said retaining surface being positioned, dimensioned and configured to facilitate retention of said implant member within said intervertebral space through cooperative engagement with corresponding surfaces of the adjacent vertebrae.
Claim 18
Dependent Claim
83 words
A vertebral interbody fusion device comprising a bone graft implant member dimensioned to span an intervertebral space between adjacent vertebrae, said implant member having a non-threaded outer surface and first and second longitudinal sections, with respective first and second cross-sectional dimensions, the juncture of said first and second longitudinal sections defining a retaining surface, said retaining surface being positioned, dimensioned and configured to facilitate retention of said implant member within said intervertebral space through cooperative engagement with corresponding surfaces of the adjacent vertebrae.
References Cited (Backward Citations)
US3703006A
Cited
US3848601A
Cited
US4185383A
Cited
US4059115A
Cited
US4349921A
Cited
US4877020A
Cited
US4743256A
Cited
US4820305A
Cited
US4834757A
Cited
US4878915A
Cited
US4772287A
Cited
EP0307241A2
Cited
US5484437A
Cited
US5015247A
Cited
US5505732A
Cited
FR2636227A1
Cited
US4961740A
Cited
US5026373A
Cited
US4961740B1
Cited
US5015255A
Cited
US5062845A
Cited
US5458638A
Cited
US5055104A
Cited
WO1993001771A1
Cited
DE4302397A1
Cited
US5489307A
Cited
US5423817A
Cited
US5443514A
Cited
US5554191A
Cited
EP0732093A2
Cited
EP0734703A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-04-19 | 2002-10-19 | 2003-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-19 | 2006-10-19 | 2007-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-19 | 2010-10-19 | 2011-04-20 | $7700.00 | Window Closed / Lapsed |