US6565571B1
Expired / Lapsed
US
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Anterior osteosynthesis plate for lumbar vertebrae or sacral lumbar vertebra and instrument for positioning same
Assignee: ScientX SA
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Filing: 1999-10-19
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Granted: 2003-05-20
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Expires: 2019-10-19
Abstract
Abstract The invention relates to an anterior osteosynthesis plate for lumbar-lumbar or lumbar-sacral vertebrae, the plate being of the type comprising: an elongate body: adapted to cover of the anterior portions of two consecutive vertebrae; possessing an anterior face ( 6 ) and an opposite posterior face ( 7 ); presenting end zones that are interconnected by a connection zone ( 11 ); and provided with two through holes for anchoring screws. According to this invention, the posterior face ( 7 ) of the plate presents a bearing surface ( 12, 13 ), which bearing surface is designed to come into contact with the anterior surface ( 3 ) of the corresponding vertebra, the bearing surfaces ( 12, 13 )being firstly inclined to define an obtuse angle (α) between them in the sagittal plane (S) matching the relative angle between the anterior portions of the two vertebrae, and secondly being interconnected in the connection zone by a concave extension ( 17 ) such that at least the posterior face ( 7 ) of the body presents a profile that is concave in the sadittal plane.
Inventors
- 👤 Andre Jackowski
- 👤 Vincent Fiere
- 👤 Charles Billot
- 👤 Philippe LeMaitre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1728; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7059; A61B17/80; A61B17/808; A61B17/1739; A61B17/1757; Y; Y10; Y10S; Y10S606/00; Y10S606/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
218 words
An anterior osteosynthesis plate for lumbar-lumbar or lumbar-sacral vertebrae, the plate being of the type comprising: an elongated body: adapted to cover at least part of the anterior portions of two consecutive vertebrae; possessing an anterior face and an opposite posterior face designed to be pressed against the anterior faces of the vertebrae; presenting first and second end zones that are interconnected by a connection zone; and provided with two through holes for anchoring screws, each formed in a respective one of the end zones; wherein the posterior face of the body of the plate presents a first bearing surface in said first end zone, and a second bearing surface in said second end zone, each bearing surface being designed to come into contact with the anterior face of the corresponding vertebrae, the bearing surfaces extending on separate planes and being firstly inclined to define an obtuse angle between said planes matching the relative angle between the anterior portions of the two vertebrae, and second being interconnected in the connection zone by a concave extension such that at least the posterior face of the body presents a profile that is concave in the sagittal plane; and wherein each bearing surface is provided with a roughnesses to encourage anchoring of the plate on the anterior portions of the vertebrae.
Claim 2
Dependent Claim
218 words
An anterior osteosynthesis plate for lumbar-lumbar or lumbar-sacral vertebrae, the plate being of the type comprising: an elongated body: adapted to cover at least part of the anterior portions of two consecutive vertebrae; possessing an anterior face and an opposite posterior face designed to be pressed against the anterior faces of the vertebrae; presenting first and second end zones that are interconnected by a connection zone; and provided with two through holes for anchoring screws, each formed in a respective one of the end zones; wherein the posterior face of the body of the plate presents a first bearing surface in said first end zone, and a second bearing surface in said second end zone, each bearing surface being designed to come into contact with the anterior face of the corresponding vertebrae, the bearing surfaces extending on separate planes and being firstly inclined to define an obtuse angle between said planes matching the relative angle between the anterior portions of the two vertebrae, and second being interconnected in the connection zone by a concave extension such that at least the posterior face of the body presents a profile that is concave in the sagittal plane; and wherein each bearing surface is provided with a roughnesses to encourage anchoring of the plate on the anterior portions of the vertebrae.
Claim 3
Dependent Claim
55 words
A plate according to claim 1 , wherein said through holes have bores formed in such a manner that the bore axes define respective angles of inclination in the sagittal plane relative to the planes in which the associated bearing surfaces extend, so that said axes diverge from each other going away from the body.
Claim 4
Dependent Claim
38 words
A plate according to claim 2 , wherein said bores each present an angle of inclination in the sagittal plane that is about 33° relative to the normal to the plane in which the associated bearing surface extends.
Claim 5
Dependent Claim
26 words
A plate according to claim 3 , wherein the bearing surfaces extend symmetrically relative to each other, defining between them an obtuse angle of about 150°.
Claim 6
Dependent Claim
41 words
A plate according to claim 2 , wherein said bores each present an angle of inclination in the sagittal plane respectively of about 50° and about 20° relative to the normal to the plane in which the associated bearing surface extends.
Claim 7
Dependent Claim
25 words
A plate according to claim 5 , wherein the bearing surfaces are mutually offset in the sagittal plane by an obtuse angle of about 130°.
Claim 8
Dependent Claim
30 words
A plate according to claim 2 , wherein each bore opens out in the anterior face of the body via a housing for positioning the head of an anchoring screw.
Claim 9
Dependent Claim
26 words
A plate according to claim 1 , wherein the body has two notches in its connection zone for co-operating with an instrument for positioning the plate.
Claim 10
Dependent Claim
21 words
A plate according to claim 1 , wherein the body presents a substantially constant thickness, at least in the sagittal plane.
Claim 11
Dependent Claim
26 words
A plate according to claim 9 , wherein the body presents a convex extension and rounded lateral faces between the anterior face and the posterior face.
Claim 12
Dependent Claim
97 words
An instrument for positioning an osteosynthesis plate, the instrument comprising a handle provided with a tool guide tube, the tube being provided at a bottom end of the handle and in a diametrically opposed manner firsty with a shoe for gripping said plate and secondly with a longitudinal sighting slot with a projection which coincides at least in part with a bottom through section of the guide tube, said guide tube being intended to extend on the same axis as one of a first or second bores of a body of the plate, held by the shoe.
Claim 13
Dependent Claim
97 words
An instrument for positioning an osteosynthesis plate, the instrument comprising a handle provided with a tool guide tube, the tube being provided at a bottom end of the handle and in a diametrically opposed manner firsty with a shoe for gripping said plate and secondly with a longitudinal sighting slot with a projection which coincides at least in part with a bottom through section of the guide tube, said guide tube being intended to extend on the same axis as one of a first or second bores of a body of the plate, held by the shoe.
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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) | 2006-05-19 | 2006-11-18 | 2007-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-05-19 | 2010-11-18 | 2011-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-05-19 | 2014-11-18 | 2015-05-20 | $7700.00 | Window Closed / Lapsed |