Patent EP0769558A1 successfully refreshed from Google Patents.
US6719794B2
Expired / Lapsed
US
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Intervertebral implant for transforaminal posterior lumbar interbody fusion procedure
Assignee: AO Technology AG
•
Filing: 2001-05-03
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Granted: 2004-04-13
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Expires: 2021-05-03
Abstract
Abstract An intervertebral implant for fusing vertebrae is disclosed. The implant has a body with curved, substantially parallel posterior and anterior faces separated by two narrow implant ends, superior and inferior faces having a plurality of undulating surfaces for contacting upper and lower vertebral endplates, and at least one depression at a first end for engagement by an insertion tool. The arcuate implant configuration facilitates insertion of the implant from a transforaminal approach into a symmetric position about the midline of the spine so that a single implant provides balanced support to the spinal column. The implant may be formed of a plurality of interconnecting bodies assembled to form a single unit. An implantation kit and method are also disclosed.
Inventors
- 👤 David Gerber
- 👤 Dominique Messerli
- 👤 David Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:33
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/4611; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1671; A61F2/44; A61F2/4455; A61F2/4465; A61F2/4684; A61B17/1604; A61B17/1659; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/3008; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30133; A61F2002/30316; A61F2002/30329; A61F2002/30383; A61F2002/30476; A61F2002/30492; A61F2002/30507; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/30594; A61F2002/30604; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30787; A61F2002/30795; A61F2002/30797; A61F2002/30841; A61F2002/30843; A61F2002/30904; A61F2/3094; A61F2002/30975; A61F2002/4625; A61F2002/4628; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0015; A61F2250/00; A61F2250/0004; A61F2250/0006; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00359
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
151 words
An intervertebral implant comprising: a body having a curved, concave posterior face and a curved, convex anterior face, both curved posterior and anterior faces extending along a longitudinal axis of the implant body; a pair of convex narrow ends separating the posterior and anterior faces; superior and inferior faces for contacting upper and lower vertebral endplates, the superior and inferior surfaces defining a thickness of the implant; and first and second non-threaded, horizontal channels configured and adapted for engagement by an implant insertion tool, the first channel disposed along at least a portion of the curved posterior face and the second channel disposed along at least a portion of the curved anterior face; wherein the superior and inferior faces are convex and include a plurality of undulating surfaces thereon; wherein the curved posterior and anterior faces form an arcuate implant configuration that facilitates insertion of the implant via a transforaminal window.
Claim 2
Dependent Claim
151 words
An intervertebral implant comprising: a body having a curved, concave posterior face and a curved, convex anterior face, both curved posterior and anterior faces extending along a longitudinal axis of the implant body; a pair of convex narrow ends separating the posterior and anterior faces; superior and inferior faces for contacting upper and lower vertebral endplates, the superior and inferior surfaces defining a thickness of the implant; and first and second non-threaded, horizontal channels configured and adapted for engagement by an implant insertion tool, the first channel disposed along at least a portion of the curved posterior face and the second channel disposed along at least a portion of the curved anterior face; wherein the superior and inferior faces are convex and include a plurality of undulating surfaces thereon; wherein the curved posterior and anterior faces form an arcuate implant configuration that facilitates insertion of the implant via a transforaminal window.
Claim 3
Dependent Claim
38 words
The implant of claim 1 , wherein the thickness of the implant between the superior and inferior faces is greatest at a mid-section between the narrow ends of the implant and the thickness tapers toward the narrow ends.
Claim 4
Dependent Claim
40 words
The implant of claim 2 , wherein the thickness of the implant between the superior and inferior faces at the mid-section is about 1.5 mm to about 2.0 mm greater than the thickness of the implant at the narrow ends.
Claim 5
Dependent Claim
12 words
The implant of claim 1 , wherein the undulating surfaces are teeth.
Claim 6
Dependent Claim
18 words
The implant of claim 1 , wherein the implant body is substantially solid and formed of allogenic bone.
Claim 7
Dependent Claim
23 words
The implant of claim 1 , wherein the implant is formed of a plurality of interconnecting bodies assembled to form a single unit.
Claim 8
Dependent Claim
30 words
The implant of claim 6 , further comprising at least one pin extending through an opening in the plurality of bodies to hold the bodies together as a single unit.
Claim 9
Dependent Claim
26 words
The implant of claim 7 , wherein the plurality of bodies have mating interlocking surfaces that aid in holding the bodies together as a single unit.
Claim 10
Dependent Claim
40 words
The implant of claim 1 , wherein the implant further comprises a longitudinal axis extending generally in a medial-lateral direction and a lateral axis extending in a anterior-posterior direction; the superior and inferior faces being convex along the longitudinal axis.
Claim 11
Dependent Claim
26 words
The implant of claim 9 , wherein the convex superior and inferior faces have a radius of curvature along the longitudinal axis of approximately 100 mm.
Claim 12
Dependent Claim
40 words
The implant of claim 1 , wherein the implant further comprises a longitudinal axis extending generally in a medial-lateral direction and a lateral axis extending in a anterior-posterior direction; the superior and inferior faces being convex along the lateral axis.
Claim 13
Dependent Claim
32 words
The implant of claim 1 , wherein the implant has a longitudinal length in the range of 29 to 32 mm and a width in the range of 9 to 11 mm.
Claim 14
Dependent Claim
30 words
The implant of claim 1 , wherein the curved anterior face has a radius of approximately 28 mm and the curved posterior face has a radius of approximately 19 mm.
Claim 15
Dependent Claim
152 words
An intervertebral implant comprising: a body having a curved, concave posterior face and a curved, convex anterior face, both curved posterior and anterior faces extending along a longitudinal axis of the implant body; a pair of convex narrow ends separating the posterior and anterior faces; superior and inferior faces for contacting upper and lower vertebral endplates, the superior and inferior surfaces defining a thickness of the implant; and first and second non-threaded, horizontal channels configured and adapted for engagement by an implant insertion tool, the first channel disposed along at least a portion of the curved posterior face and the second channel disposed along at least a portion of the curved anterior face; wherein the implant is formed of a plurality of interconnecting bodies assembled to form a single unit; wherein the curved posterior and anterior faces form an arcuate implant configuration that facilitates insertion of the implant via a transforaminal window.
Claim 16
Dependent Claim
152 words
An intervertebral implant comprising: a body having a curved, concave posterior face and a curved, convex anterior face, both curved posterior and anterior faces extending along a longitudinal axis of the implant body; a pair of convex narrow ends separating the posterior and anterior faces; superior and inferior faces for contacting upper and lower vertebral endplates, the superior and inferior surfaces defining a thickness of the implant; and first and second non-threaded, horizontal channels configured and adapted for engagement by an implant insertion tool, the first channel disposed along at least a portion of the curved posterior face and the second channel disposed along at least a portion of the curved anterior face; wherein the implant is formed of a plurality of interconnecting bodies assembled to form a single unit; wherein the curved posterior and anterior faces form an arcuate implant configuration that facilitates insertion of the implant via a transforaminal window.
Claim 17
Dependent Claim
30 words
The implant of claim 14 , further comprising at least one pin extending through an opening in the plurality of bodies to hold the bodies together as a single unit.
Claim 18
Dependent Claim
26 words
The implant of claim 15 , wherein the plurality of bodies have mating interlocking surfaces that aid in holding the bodies together as a single unit.
Claim 19
Dependent Claim
19 words
The implant of claim 14 , further comprising a plurality of undulating surfaces on the superior and inferior faces.
Claim 20
Dependent Claim
12 words
The implant of claim 17 , wherein the undulating surfaces are teeth.
Claim 21
Dependent Claim
14 words
The implant of claim 17 , wherein the superior and inferior faces are convex.
Claim 22
Dependent Claim
38 words
The implant of claim 19 , wherein the thickness of the implant between the superior and inferior faces is greatest at a mid-section between the narrow ends of the implant and the thickness tapers toward the narrow ends.
Claim 23
Dependent Claim
40 words
The implant of claim 20 , wherein the thickness of the implant between the superior and inferior faces at the mid-section is about 1.5 mm to about 2.0 mm greater than the thickness of the implant at the narrow ends.
Claim 24
Dependent Claim
40 words
The implant of claim 19 , wherein the implant further comprises a longitudinal axis extending generally in a medial-lateral direction and a lateral axis extending in a anterior-posterior direction; the superior and inferior faces being convex along the longitudinal axis.
Claim 25
Dependent Claim
26 words
The implant of claim 22 , wherein the convex superior and inferior faces have a radius of curvature along the longitudinal axis of approximately 100 mm.
Claim 26
Dependent Claim
40 words
The implant of claim 19 , wherein the implant further comprises a longitudinal axis extending generally in a medial-lateral direction and a lateral axis extending in a anterior-posterior direction; the superior and inferior faces being convex along the lateral axis.
Claim 27
Dependent Claim
18 words
The implant of claim 14 , wherein the implant body is substantially solid and formed of allogenic bone.
Claim 28
Dependent Claim
32 words
The implant of claim 14 , wherein the implant has a longitudinal length in the range of 29 to 32 mm and a width in the range of 9 to 11 mm.
Claim 29
Dependent Claim
30 words
The implant of claim 14 , wherein the curved anterior face has a radius of approximately 28 mm and the curved posterior face has a radius of approximately 19 mm.
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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) | 2007-04-13 | 2007-10-13 | 2008-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-04-13 | 2011-10-13 | 2012-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-04-13 | 2015-10-13 | 2016-04-13 | $7700.00 | Window Closed / Lapsed |