US6626943B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial intervertebral disc
Assignee: Zimmer GmbH
•
Filing: 2002-08-23
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Granted: 2003-09-30
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Expires: 2022-08-23
Abstract
Abstract The invention relates to an artificial intervertebral disc for implantation between two vertebral bodies (W) comprising two end plates ( 1, 2 ) and an elastically deformable disc ( 3 ) pre-stressed between the end plates ( 1, 2 ) in the axial direction, with the disc ( 3 ) lying within a tubular, elastically deformable, fibre ring ( 4 ) and the end plates ( 1, 2 ) being in tensile communication with the fibre ring ( 4 ). The disc ( 3 ) has a contact surface ( 5, 6 ) which enlarges with a compression of the artificial intervertebral disc and which adjoins one of the end plates ( 1, 2 ) so that the elastic properties of the artificial intervertebral disc show a non-linear behaviour with increasing deformation at least with respect to a compression force (F).
Inventors
- 👤 Robert Eberlein
- 👤 Simon Casutt
- 👤 Markus Fröhlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:26
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30014; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2002/30316; A61F2002/30329; A61F2002/30383; A61F2002/30433; A61F2002/30448; A61F2002/30451; A61F2002/30476; A61F2002/30495; A61F2002/30517; A61F2002/30535; A61F2002/30563; A61F2/30767; A61F2/30771; A61F2002/30841; A61F2002/30878; A61F2002/30879; A61F2002/30884; A61F2/30907; A61F2002/30909; A61F2/3094; A61F2002/30975; A61F2/4425; A61F2002/443; A61F2220/00; A61F2220/0025; A61F2220/0041; A61F2220/005; A61F2220/0058; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2250/00; A61F2250/0014; A61F2250/0018; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
141 words
An artificial intervertebral disc for implantation between two vertebral bodies (W) comprising two end plates ( 1 , 2 ) and an elastically deformable disc ( 3 ) pre-stressed between the end plates ( 1 , 2 ) in the axial direction, with the disc ( 3 ) lying within a tubular, elastically deformable, fibre ring ( 4 ) and the end plates ( 1 , 2 ) being in tensile connection with the fibre ring ( 4 ), wherein the disc ( 3 ) has a contact surface ( 5 , 6 ) with one of the adjoining end plates ( 1 , 2 ) which enlarges with a compression of the artificial intervertebral disc, and the elastic properties of the artificial intervertebral disc shown a non-linear behavior with increasing deformation at least with respect to a compression force (F).
Claim 2
Dependent Claim
141 words
An artificial intervertebral disc for implantation between two vertebral bodies (W) comprising two end plates ( 1 , 2 ) and an elastically deformable disc ( 3 ) pre-stressed between the end plates ( 1 , 2 ) in the axial direction, with the disc ( 3 ) lying within a tubular, elastically deformable, fibre ring ( 4 ) and the end plates ( 1 , 2 ) being in tensile connection with the fibre ring ( 4 ), wherein the disc ( 3 ) has a contact surface ( 5 , 6 ) with one of the adjoining end plates ( 1 , 2 ) which enlarges with a compression of the artificial intervertebral disc, and the elastic properties of the artificial intervertebral disc shown a non-linear behavior with increasing deformation at least with respect to a compression force (F).
Claim 3
Dependent Claim
39 words
An artificial intervertebral disc in accordance with claim 1 , wherein the value for the stiffness of the artificial intervertebral disc under a compression force (F) of 2,500 N lies in a range between 1,700 N/mm and 4,500 N/mm.
Claim 4
Dependent Claim
42 words
An artificial intervertebral disc in accordance with claim 1 , wherein the shear modulus of the disc ( 3 ) increases in the radial direction such that the stiffness of the artificial intervertebral disc likewise increases with an increasing compression force (F).
Claim 5
Dependent Claim
33 words
An artificial intervertebral disc in accordance with claim 1 , wherein the fibre ring ( 4 ) consists of a fabric, a knitted fabric or a braid and comprises one or more layers.
Claim 6
Dependent Claim
40 words
An artificial intervertebral disc in accordance with claim 1 , wherein the materials building up the fibre ring ( 4 ) comprise one or more plastics such as polyamide, polyimide, carbon fibres or polyether etherketone (PEEK), preferably polyethylene terephthalate (PET).
Claim 7
Dependent Claim
31 words
An artificial intervertebral disc in accordance with claim 1 , wherein the disc ( 3 ) comprises two concentrically arranged ring parts ( 7 , 8 ) mutually effectively fixedly connected.
Claim 8
Dependent Claim
26 words
An artificial intervertebral disc in accordance with claim 1 , wherein the materials building up the disc ( 3 ) comprise silicon elastomers or rubber materials.
Claim 9
Dependent Claim
33 words
An artificial intervertebral disc in accordance with claim 1 , wherein the end plates ( 1 , 2 ) consist of a metal, preferably of titanium, of a titanium alloy or of plastic.
Claim 10
Dependent Claim
56 words
An artificial intervertebral disc in accordance with claim 1 , wherein the end plates ( 1 , 2 ) are formed as anchoring platforms in order to achieve a growing together of the adjoining vertebral bodies (W) with the outwardly directed areas ( 9 , 10 ) of the end plates ( 1 , 2 ).
Claim 11
Dependent Claim
45 words
An artificial intervertebral disc in accordance with claim 1 , at which one of the end plates ( 1 , 2 ) has a groove ( 11 , 12 ) extending in the peripheral direction in order to receive the fibre ring ( 4 ).
Claim 12
Dependent Claim
48 words
An artificial intervertebral disc in accordance with claim 10 , at which the fibre ring ( 4 ) is pressed in one of the grooves ( 11 , 12 ) by cold forming (V) for the connection to one of the end plates ( 1 , 2 ).
Claim 13
Dependent Claim
52 words
An artificial intervertebral disc in accordance with claim 10 , at which the fibre ring ( 4 ) is fixed by an annular clamping element ( 13 ) in one of the grooves ( 11 , 12 ) for the connection to one of the end plates ( 1 , 2 ).
Claim 14
Dependent Claim
51 words
An artificial intervertebral disc in accordance with claim 1 , at which the fibre ring ( 4 ) is fixed by a holding element ( 14 ), preferably by means of a screw connection ( 15 ), for the connection to one of the end plates ( 1 , 2 ).
Claim 15
Dependent Claim
47 words
An artificial intervertebral disc in accordance with claim 10 , at which the fibre ring ( 4 ) is adhesively bonded or welded in one of the grooves ( 11 , 12 ) for the connection to one of the end plates ( 1 , 2 ).
Claim 16
Dependent Claim
60 words
An artificial intervertebral disc in accordance with claim 10 , at which the fibre ring ( 4 ) is injection moulded with plastic in an annular manner in one of the grooves ( 11 , 12 ) of the end plates ( 1 , 2 ) for the connection to one of the end plates ( 1 , 2 ).
Claim 17
Dependent Claim
48 words
An artificial intervertebral disc in accordance with claim 1 , at which the fibre ring ( 4 ) is injection moulded with plastic for the connection to one of the end plates ( 1 , 2 ) at one of the surfaces ( 9 , 10 ) thereof.
Claim 18
Dependent Claim
29 words
An artificial intervertebral disc in accordance with claim 1 , wherein the end plates ( 1 , 2 ) have a projecting central rib ( 16 ), which extends.
Claim 19
Dependent Claim
57 words
An artificial intervertebral disc in accordance with claim 1 , wherein the end plates ( 1 , 2 ) have a toothed arrangement ( 17 ) directed to the vertebra (W) at its outer rim such that a form-locked connection is achieved by the ingrowth of bone material for the transmission of torsional, bending and shear forces.
Claim 20
Dependent Claim
59 words
An artificial intervertebral disc in accordance with claim 1 , wherein the pre-stress under which the disc ( 3 ) is put by the fibre ring ( 4 ) in the unloaded state is so high that with a maximum pressure stress, the fibre ring ( 4 ) still always has a positive residual stress in the tension direction.
References Cited (Backward Citations)
US3867728A
Cited
US4932969A
Cited
EP0346269A2
Cited
US5002576A
Cited
US4911718A
Cited
US5674294A
Cited
US5458642A
Cited
US5674296A
Cited
US5683465A
Cited
US5989291A
Cited
US6063121A
Cited
FR2787018A1
Cited
FR2787015A1
Cited
WO2000035385A1
Cited
US6402785B1
Cited
DE20019520U1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-09-29 | 2007-03-31 | 2007-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-09-29 | 2011-03-31 | 2011-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-09-29 | 2015-03-31 | 2015-09-30 | $7700.00 | Window Closed / Lapsed |