US6743234B2
Expired / Lapsed
US
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Methods and instrumentation for vertebral interbody fusion
Assignee: Warsaw Orthopedic Inc
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Filing: 2001-09-27
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Granted: 2004-06-01
•
Expires: 2021-09-27
Abstract
Abstract Methods and instrumentation particularly adapted for disc space preparation for insertion of implants from an anterior approach to the spine are provided. The instruments include a guide sleeve defining a channel having overlapping cylindrical working channel portions and lateral non-distracting extensions extending from reduced thickness wall portions. The guide sleeve has an overall reduced width configuration. A pair of distractors are provided. A first distractor includes a shaft and distal tip, and the second distractor includes a shaft and distal tip. The first and second distractors can be used with the guide sleeve. Methods using the disclosed instruments are also provided.
Inventors
- 👤 J. Kenneth Burkus
- 👤 Eddie F. Ray, III
- 👤 James P. Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/02; A61B17/025; A61B17/16; A61B17/1662; A61B17/1671; A61B17/17; A61B17/1739; A61B17/1757; A61B90/00; A61B90/90; A61B90/94; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/4455; A61F2/446; A61F2/46; A61F2/4603; A61F2/4611; A61B17/1735; A61B2017/0256; A61B90/03; A61B2090/033; A61B2090/034; A61F2/442; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30593; A61F2002/30604; A61F2/30767; A61F2/30771; A61F2002/3082; A61F2002/3085; A61F2002/30871; A61F2002/30904; A61F2002/448; A61F2002/4625; A61F2002/4627; A61F2002/4681; A61F2002/4687; A61F2250/00; A61F2250/0058; A61F2250/006; A61F2250/0063
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
261 words
A spinal disc space distractor, comprising: a body positionable in a spinal disc space between adjacent vertebrae, said body having a distal end surface, a proximal end and a central axis extending therebetween, said body including: a lateral surface extending generally in the direction of said central axis; a medial surface opposite said lateral surface and extending generally in the direction of said central axis; an upper surface extending generally in the direction of said central axis; a lower surface opposite said upper surface and extending generally in the direction of said central axis; a first transition surface extending between said distal end surface and said lateral surface, said first transition surface having a first curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in an axial plane; a second upper transition surface extending between said lateral surface and said upper surface and a second lower transition surface extending between said lateral surface and said lower surface, said second upper and lower transition surfaces each having a second curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in a coronal plane; and a third upper transition surface extending between said distal end surface and said upper surface and a third lower transition surface extending between said distal end surface and said lower surface, said third upper and lower transition surfaces each having a third curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in a sagittal plane.
Claim 2
Dependent Claim
261 words
A spinal disc space distractor, comprising: a body positionable in a spinal disc space between adjacent vertebrae, said body having a distal end surface, a proximal end and a central axis extending therebetween, said body including: a lateral surface extending generally in the direction of said central axis; a medial surface opposite said lateral surface and extending generally in the direction of said central axis; an upper surface extending generally in the direction of said central axis; a lower surface opposite said upper surface and extending generally in the direction of said central axis; a first transition surface extending between said distal end surface and said lateral surface, said first transition surface having a first curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in an axial plane; a second upper transition surface extending between said lateral surface and said upper surface and a second lower transition surface extending between said lateral surface and said lower surface, said second upper and lower transition surfaces each having a second curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in a coronal plane; and a third upper transition surface extending between said distal end surface and said upper surface and a third lower transition surface extending between said distal end surface and said lower surface, said third upper and lower transition surfaces each having a third curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in a sagittal plane.
Claim 3
Dependent Claim
38 words
The distractor of claim 1 , wherein said third upper transition surface extends between said first transition surface and said upper surface and said third lower transition surface extends between said first transition surface and said lower surface.
Claim 4
Dependent Claim
20 words
The distractor of claim 1 , wherein said upper and lower surfaces each include a plurality of teeth formed therein.
Claim 5
Dependent Claim
56 words
The distractor of claim 1 , wherein said upper surface includes a proximal portion and a distal portion and said lower surface includes a proximal portion and a distal portion, said proximal portions being generally parallel with one another and said distal portions tapering toward one another from said proximal portions toward said distal end surface.
Claim 6
Dependent Claim
28 words
The distractor of claim 1 , wherein the distractor includes a proximal end wall adjacent said proximal end and said body extends distally from said proximal end wall.
Claim 7
Dependent Claim
49 words
The distractor of claim 5 , wherein said proximal end wall includes an inner surface extending above said upper surface and an inner surface extending below said lower surface, said inner surfaces capable of contacting adjacent vertebrae to limit insertion depth of said body in the spinal disc space.
Claim 8
Dependent Claim
25 words
The distractor of claim 5 , wherein said proximal end wall and said body include a bore extending distally therein from said proximal end wall.
Claim 9
Dependent Claim
14 words
The distractor of claim 7 , further comprising a shaft attachable to said bore.
Claim 10
Dependent Claim
24 words
The distractor of claim 1 , wherein said body is made from radiolucent material and said body further includes at least one radiographic marker.
Claim 11
Dependent Claim
19 words
The distractor of claim 1 , wherein said distal end surface is linear and orthogonal to said central axis.
Claim 12
Dependent Claim
42 words
The distractor of claim 1 , wherein said lateral surface includes a central linear region extending parallel to the central axis, said second upper and lower transition surfaces extending between said central region and said upper surface and said lower surface, respectively.
Claim 13
Dependent Claim
135 words
A spinal disc space distractor, comprising: a body positionable in a spinal disc space between adjacent vertebrae, said body having a central axis extending therethrough, said body including: a distal end surface; a lateral surface extending generally in the direction of said central axis; a medial surface opposite said lateral surface and extending generally in the direction of said central axis; an upper surface extending generally in the direction of said central axis; a lower surface opposite said upper surface and extending generally in the direction of said central axis; and at least a first transition surface extending between said distal end surface and said lateral surface, said first transition surface having a first curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in an axial plane.
Claim 14
Dependent Claim
135 words
A spinal disc space distractor, comprising: a body positionable in a spinal disc space between adjacent vertebrae, said body having a central axis extending therethrough, said body including: a distal end surface; a lateral surface extending generally in the direction of said central axis; a medial surface opposite said lateral surface and extending generally in the direction of said central axis; an upper surface extending generally in the direction of said central axis; a lower surface opposite said upper surface and extending generally in the direction of said central axis; and at least a first transition surface extending between said distal end surface and said lateral surface, said first transition surface having a first curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in an axial plane.
Claim 15
Dependent Claim
72 words
The distractor of claim 12 , wherein said body further includes a second upper transition surface extending between said lateral surface and said upper surface and a second lower transition surface extending between said lateral surface and said lower surface, said second upper and lower transition surfaces each having a second curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in a coronal plane.
Claim 16
Dependent Claim
42 words
The distractor of claim 13 , wherein said lateral surface includes a central linear region extending parallel to the central axis, said second upper and lower transition surfaces extending between said central region and said upper surface and said lower surface, respectively.
Claim 17
Dependent Claim
34 words
The distractor of claim 13 , wherein said first curvature is defined by a radius of curvature of 9 millimeters and said second curvature is defined by a radius of curvature of 8 millimeters.
Claim 18
Dependent Claim
69 words
The distractor of claim 13 , a third upper transition surface extending between said distal end surface and said upper surface and a third lower transition surface extending between said distal end surface and said lower surface, said third upper and lower transition surfaces each having a third curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in a sagittal plane.
Claim 19
Dependent Claim
38 words
The distractor of claim 16 , wherein said third upper transition surface extends between said first transition surface and said upper surface and said third lower transition surface extends between said first transition surface and said lower surface.
Claim 20
Dependent Claim
56 words
The distractor of claim 12 , wherein said upper surface includes a proximal portion and a distal portion and said lower surface includes a proximal portion and a distal portion, said proximal portions being generally parallel with one another and said distal portions tapering toward one another from said proximal portions toward said distal end surface.
Claim 21
Dependent Claim
20 words
The distractor of claim 12 , wherein said first curvature is defined by a radius of curvature of 9 millimeters.
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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) | 2007-06-01 | 2007-12-01 | 2008-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-06-01 | 2011-12-01 | 2012-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-06-01 | 2015-12-01 | 2016-06-01 | $7700.00 | Window Closed / Lapsed |