Patent US5542946A successfully refreshed from Google Patents.
US5542946A
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Hook for an occipito-cervical rod or plate of an occipito-cervical osteosynthesis instrumentation
Assignee: Societe de Fabrication de Material Orthopedique en Abrege SOFAMOR SNC
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Filing: 1994-05-27
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Granted: 1996-08-06
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Expires: 2014-05-27
Abstract
Abstract The hook (32) comprises a body (33) and a laminar portion (37) which is suitably profiled and adapted to penetrate a foramen opening at the base of the occiput against which it bears. The body is arranged to receive an osteosynthesis rod or plate and has a plane of symmetry (P). The laminar portion (37) has a curvature adapted to the thickness of the occipito-cervical shell and is inclined relative to one side or the other of the plane of symmetry (P) so as to be adaptable to the anatomy of the edge of the occiput in the region of the foramen. This inclination may be for example substantially 45°. This asymmetry of the laminar portion (37) relative to the body (33) of the hook (32) enables the surgeon to avoid having to previously remove a piece of the edge of the occiput of the patient and consequently damage the occiput.
Inventors
- 👤 Carlo Logroscino
- 👤 Michel Goube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:32
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7056; A61B17/7001; A61B17/7002; A61B17/7055; A61B17/7032
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
Hook for an occipito-cervical rod or plate of an occipito-cervical osteosynthesis instrumentation, said hook comprising a generally U-shaped body with opposite side branches having a laminar portion defined by a strip suitably profiled and adapted to penetrate a foramen opening at the base of the occiput, said body being adapted to receive an osteosynthesis rod or plate and having a median plane of symmetry extending between said side branches, said strip being inclined relative to either side of said median plane of symmetry so as to adapt itself to the anatomy of the edge of the occiput in the region of the foramen.
Claim 2
Dependent Claim
103 words
Hook for an occipito-cervical rod or plate of an occipito-cervical osteosynthesis instrumentation, said hook comprising a generally U-shaped body with opposite side branches having a laminar portion defined by a strip suitably profiled and adapted to penetrate a foramen opening at the base of the occiput, said body being adapted to receive an osteosynthesis rod or plate and having a median plane of symmetry extending between said side branches, said strip being inclined relative to either side of said median plane of symmetry so as to adapt itself to the anatomy of the edge of the occiput in the region of the foramen.
Claim 3
Dependent Claim
21 words
Hook according to claim 1, wherein said strip has an inclination of substantially 45° relative to said median plane of symmetry.
Claim 4
Dependent Claim
168 words
Occipito-cervical osteosynthesis instrumentation comprising two separate similarly configured parts, namely a right part and a left part, each part including a cervical rod having asperities and an elongate occipital plate which is in one piece with said rod and extends said rod toward said occiput in the position of use, and adjustable means for anchoring said rod to the vertebrae C1-C3 and for anchoring said plate to said occiput, each of said parts being pre-angulated and so profiled as to be adapted to the anatomy of the occipito-cervical connection of the human spine, said adjustable means for anchoring said plate to said occiput comprising hooks adapted to penetrate the foramen openings at the base of said occiput against which they bear, each hook including a laminar portion and a generally U-shaped body with opposite side branches adapted to receive the rod or plate and having a median plane extending between said side branches and said laminar portion is inclined relative to either side of said plane of symmetry.
Claim 5
Dependent Claim
168 words
Occipito-cervical osteosynthesis instrumentation comprising two separate similarly configured parts, namely a right part and a left part, each part including a cervical rod having asperities and an elongate occipital plate which is in one piece with said rod and extends said rod toward said occiput in the position of use, and adjustable means for anchoring said rod to the vertebrae C1-C3 and for anchoring said plate to said occiput, each of said parts being pre-angulated and so profiled as to be adapted to the anatomy of the occipito-cervical connection of the human spine, said adjustable means for anchoring said plate to said occiput comprising hooks adapted to penetrate the foramen openings at the base of said occiput against which they bear, each hook including a laminar portion and a generally U-shaped body with opposite side branches adapted to receive the rod or plate and having a median plane extending between said side branches and said laminar portion is inclined relative to either side of said plane of symmetry.
Claim 6
Dependent Claim
22 words
Instrumentation according to claim 3, wherein said laminar portion has an inclination of substantially 45° relative to said median plane of symmetry.
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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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |