Patent US6416551B1 successfully refreshed from Google Patents.
US6416551B1
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Intervertebral endoprosthesis with a toothed connection plate
Assignee: Waldemar Link GmbH and Co KG
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Filing: 2000-05-19
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Granted: 2002-07-09
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Expires: 2020-05-19
Abstract
Abstract An implant, in particular an intervertebral endoprosthesis, with a connection plate ( 3 ) which is to be fixed so as to bear on a bone surface and which is to be applied to the bone surface in a direction of application running transverse to its main extension. For protection against a shearing force running parallel to its main extension, the connection plate ( 3 ) has teeth ( 6 ) projecting in the direction of application. These teeth ( 6 ) are delimited by surfaces ( 11, 12, 13 ) which include a main surface ( 11 ) arranged in the direction of application and transverse to the direction of shearing. Two teeth or groups of teeth in each case lie opposite one another in the direction of shearing and point in opposite directions.
Inventors
- 👤 Arnold Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4425; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30156; A61F2002/30158; A61F2002/30621; A61F2002/30649; A61F2002/30663; A61F2/30767; A61F2/30771; A61F2002/30841; A61F2002/30845; A61F2002/30878; A61F2002/30891; A61F2002/30892; A61F2002/443; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0023; A61F2230/0026
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
163 words
An intervertebral endoprosthesis, comprising a connection plate configured to be fixed on a vertebral surface and to be applied to the vertebral surface in a direction of application that is transverse to a direction of a longer dimension of the connection plate, the connection plate having teeth projecting from a side of the connection plate configured to be fixed on the vertebral surface approximately in the direction of application, another side of the connection plate being configured to engage a core of the intervertebral endoprosthesis, the teeth being defined by surfaces comprising main surfaces arranged in the direction of application, two groups of a plurality of teeth being disposed opposite one another with reference to the direction of a longer dimension of the connection plate, the teeth of one group pointing in directions opposite to directions in which diametrically opposed teeth of the other group point, and the main surfaces of the teeth extending substantially perpendicularly from the side of the connection plate.
Claim 2
Dependent Claim
163 words
An intervertebral endoprosthesis, comprising a connection plate configured to be fixed on a vertebral surface and to be applied to the vertebral surface in a direction of application that is transverse to a direction of a longer dimension of the connection plate, the connection plate having teeth projecting from a side of the connection plate configured to be fixed on the vertebral surface approximately in the direction of application, another side of the connection plate being configured to engage a core of the intervertebral endoprosthesis, the teeth being defined by surfaces comprising main surfaces arranged in the direction of application, two groups of a plurality of teeth being disposed opposite one another with reference to the direction of a longer dimension of the connection plate, the teeth of one group pointing in directions opposite to directions in which diametrically opposed teeth of the other group point, and the main surfaces of the teeth extending substantially perpendicularly from the side of the connection plate.
Claim 3
Dependent Claim
166 words
An intervertebral endoprosthesis, comprising a connection plate configured to be fixed on a vertebral surface and to be applied to the vertebral surface in a direction of application that is transverse to a direction of a longer dimension of the connection plate, the connection plate comprising teeth projecting from a side of the connection plate configured to be fixed on the vertebral surface approximately in the direction of application, each tooth being defined by surfaces comprising a main surface arranged in the direction of application, side surfaces, and a rear surface, two groups of a plurality of teeth being disposed opposite one another with reference to the direction of a longer dimension of the connection plate, the teeth of one group pointing in directions opposite to directions in which diametrically opposed teeth of the other group point, wherein the main surfaces of the teeth of the one group are oriented so as to face away from the main surfaces of the teeth of the other group.
Claim 4
Dependent Claim
166 words
An intervertebral endoprosthesis, comprising a connection plate configured to be fixed on a vertebral surface and to be applied to the vertebral surface in a direction of application that is transverse to a direction of a longer dimension of the connection plate, the connection plate comprising teeth projecting from a side of the connection plate configured to be fixed on the vertebral surface approximately in the direction of application, each tooth being defined by surfaces comprising a main surface arranged in the direction of application, side surfaces, and a rear surface, two groups of a plurality of teeth being disposed opposite one another with reference to the direction of a longer dimension of the connection plate, the teeth of one group pointing in directions opposite to directions in which diametrically opposed teeth of the other group point, wherein the main surfaces of the teeth of the one group are oriented so as to face away from the main surfaces of the teeth of the other group.
Claim 5
Dependent Claim
16 words
The intervertebral endoprosthesis as claimed in claim 2 , wherein the main surfaces have sharp edges.
Claim 6
Dependent Claim
30 words
The intervertebral endoprosthesis as claimed in claim 3 , wherein the teeth have side surfaces that form angles (β) of not more than 80° with respect to the main surfaces.
Claim 7
Dependent Claim
20 words
The intervertebral endoprosthesis as claimed in claim 4 , wherein the main surfaces of the teeth are trapezoidal in shape.
Claim 8
Dependent Claim
28 words
The intervertebral endoprosthesis as claimed in one of claims 1 through 5 , wherein the groups of teeth are provided on opposite edge areas of the connection plate.
Claim 9
Dependent Claim
46 words
The intervertebral endoprosthesis as claimed in claim 5 , wherein the main surfaces of the teeth of each group are oriented differently at angles (α) of at least ±20° in relation to a direction transverse to the direction of a longer dimensional of the connection plate.
Claim 10
Dependent Claim
24 words
The intervertebral endoprosthesis as claimed in claim 3 , wherein the groups of teeth are provided on opposite edge areas of the connection plate.
Claim 11
Dependent Claim
16 words
The intervertebral endoprosthesis as claimed in claim 1 , wherein the main surfaces have sharp edges.
Claim 12
Dependent Claim
34 words
The intervertebral endoprosthesis of claim 2 , wherein an apex angle of the main surface of a tooth differs from an apex angle of the rear surface of said tooth by 10° to 25°.
Claim 13
Dependent Claim
43 words
The intervertebral endoprosthesis of claim 2 , wherein the main surface of a tooth forms an angle with the connection plate of about 90° and the rear surface of said tooth forms an angle with the connection plate of about 105° to 145°.
Claim 14
Dependent Claim
33 words
The intervertebral endoprosthesis of claim 2 , wherein an apex angle of the main surface of a tooth differs from an apex angle of the rear surface of said tooth by about 15°.
Claim 15
Dependent Claim
41 words
The intervertebral endoprosthesis of claim 2 , wherein the main surface of a tooth forms an angle with the connection plate of about 90° and the rear surface of said tooth forms an angle with the connection plate of about 115°.
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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) | 2005-07-08 | 2006-01-07 | 2006-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-08 | 2010-01-07 | 2010-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-08 | 2014-01-07 | 2014-07-09 | $7700.00 | Window Closed / Lapsed |