US6547823B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intervertebral implant
Assignee: Warsaw Orthopedic Inc
•
Filing: 1999-06-08
•
Granted: 2003-04-15
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Expires: 2019-06-08
Abstract
Abstract An intervertebral implant having a composite wedge/dowel configuration is provided. The intervertebral implant includes a central body portion and a pair of radially extending wings. The radially extending wings can be tapered from a first end of the implant to the second end of the implant along an axis parallel to the longitudinal axis of the central body portion. Alternately, the radially extending wings can be tapered along an axis transverse to the longitudinal axis of the cylindrical body portion or along any other axis between parallel and transverse to the longitudinal axis. A throughbore or plurality of throughbores extend from a top surface of the implant through the implant to a bottom surface of the implant. The implant may be formed from a cortical ring cut from the diaphysis of a long bone by milling the top and bottom surfaces of the cortical ring to form the substantially central body portion and the tapered radially extending wings. The cortical ring is milled such that the intramedullary canal of the cortical ring defines a throughbore in the central body portion of the implant. The sidewalls of the implant may be machined to form a substantially rectangular shape or the implant can be left to have a substantially circular configuration. Alternately, the implant may be formed of any biocompatible material having the requisite strength requirements via any known process, i.e., molding.
Inventors
- 👤 Nelson L. Scarborough
- 👤 John W. Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:12
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/30767; A61F2/30771; A61F2/46; A61F2/4644; A61F2/28; A61F2/3094; A61F2/30965; A61F2/442; A61F2/4603; A61F2/4611; A61F2002/2817; A61F2002/2825; A61F2002/2835; A61F2002/2839; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30153; A61F2002/30158; A61F2002/30199; A61F2002/30205; A61F2002/30224; A61F2002/30225; A61F2002/3023; A61F2002/30261; A61F2002/30266; A61F2002/30772; A61F2002/30774; A61F2002/30784; A61F2002/30785; A61F2002/30789; A61F2002/3079; A61F2002/30878; A61F2002/30879; A61F2002/30884; A61F2002/30891; A61F2002/30892; A61F2002/30899; A61F2002/30902; A61F2002/30904; A61F2002/30971; A61F2002/448; A61F2002/4649; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0019; A61F2230/0026; A61F2230/0063; A61F2230/0067; A61F2230/0069; A61F2230/0082; A61F2240/00; A61F2240/001; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00035; A61F2310/00131; A61F2310/00179; A61F2310/00293; A61F2310/00359; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
84 words
An intervertebral implant comprising: a first central body portion having a longitudinal axis; and at least one wing extending radially outwardly from the central body portion, the central body portion and the at least one wing being formed of bone and being of monolithic construction; wherein the at least one radially extending wing has a height which decreases along the longitudinal axis of the central body portion from one end of the central body portion to the other end of the central body portion.
Claim 2
Dependent Claim
84 words
An intervertebral implant comprising: a first central body portion having a longitudinal axis; and at least one wing extending radially outwardly from the central body portion, the central body portion and the at least one wing being formed of bone and being of monolithic construction; wherein the at least one radially extending wing has a height which decreases along the longitudinal axis of the central body portion from one end of the central body portion to the other end of the central body portion.
Claim 3
Dependent Claim
34 words
An intervertebral implant according to claim 1 wherein the intervertebral implant includes two radially extending wings, each of the radially extending wings having a shape substantially the same as the other radially extending wing.
Claim 4
Dependent Claim
23 words
An intervertebral implant according to claim 1 , wherein the implant is manufactured from the diaphysis or the metaphysis of a long bone.
Claim 5
Dependent Claim
21 words
An intervertebral implant according to claim 3 , further including a throughbore defined by the intramedullary canal of the long bone.
Claim 6
Dependent Claim
27 words
An intervertebral implant according to claim 1 , wherein the implant is manufactured from a cortical ring cut from the diaphysis or metaphysis of a long bone.
Claim 7
Dependent Claim
19 words
An intervertebral implant according to claim 1 , further including protrusions formed on the surface of the intervertebral implant.
Claim 8
Dependent Claim
21 words
An intervertebral implant according to claim 6 , wherein the protrusions are formed on the at least one radially extending wing.
Claim 9
Dependent Claim
19 words
An intervertebral implant according to claim 1 , wherein the implant is formed from a bone derived composite material.
Claim 10
Dependent Claim
19 words
An intervertebral implant according to claim 1 , wherein the implant is formed from a bone derived layered material.
Claim 11
Dependent Claim
38 words
An intervertebral implant according to claim 1 , further including at least one throughbore defined in the central body portion, the throughbore having an axis which is substantially perpendicular to the longitudinal axis of the central body portion.
Claim 12
Dependent Claim
14 words
An intervertebral implant according to claim 1 , wherein the bone is partially demineralized.
Claim 13
Dependent Claim
16 words
An intervertebral implant according to claim 1 , wherein the first central body portion is frustoconical.
Claim 14
Dependent Claim
73 words
An intervertebral implant comprising: a first central body portion having a longitudinal axis; and a pair of wings extending radially outwardly from the central body portion, one of the pair of wings extending from one side of the central body portion and the other of the pair of wings extending from an opposite side of the central body portion, wherein the central body portion and the pair of wings are formed of bone.
Claim 15
Dependent Claim
73 words
An intervertebral implant comprising: a first central body portion having a longitudinal axis; and a pair of wings extending radially outwardly from the central body portion, one of the pair of wings extending from one side of the central body portion and the other of the pair of wings extending from an opposite side of the central body portion, wherein the central body portion and the pair of wings are formed of bone.
Claim 16
Dependent Claim
23 words
An intervertebral implant according to claim 13 , wherein the implant is manufactured from the diaphysis or the metaphysis of a long bone.
Claim 17
Dependent Claim
27 words
An intervertebral implant according to claim 13 , wherein the implant is manufactured from a cortical ring cut from the diaphysis or metaphysis of a long bone.
Claim 18
Dependent Claim
39 words
An intervertebral implant according to claim 13 , further including at least one throughbore defined in the central body portion, the throughbore having an axis which is substantially perpendicular to the longitudinal axis of the substantially cylindrical body portion.
Claim 19
Dependent Claim
36 words
An intervertebral implant according to claim 13 , wherein each of the radially extending wings includes a top and a bottom surface, the top and bottom surfaces being shaped to conform to a vertebral endplate's shape.
Claim 20
Dependent Claim
14 words
An intervertebral implant according to claim 13 , wherein the bone is partially demineralized.
Claim 21
Dependent Claim
14 words
An intervertebral implant according to claim 13 , wherein the implant is surface demineralized.
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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) | 2006-04-14 | 2006-10-14 | 2007-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-04-14 | 2010-10-14 | 2011-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-04-14 | 2014-10-14 | 2015-04-15 | $7700.00 | Window Closed / Lapsed |