US5755798A
Expired / Lapsed
US
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Intervertebral implant
Assignee: Artos Medizinische Produkte GmbH
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Filing: 1996-10-25
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Granted: 1998-05-26
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Expires: 2016-10-25
Abstract
Abstract An intervertebral implant for insertion between adjacent vertebrae. The implant includes a spacer having two end faces and defining a continuous hollow channel therein configured to receive natural bone substance; and flanges disposed on respective end faces of the spacer and extending in each respective end plane thereof for connection to the adjacent vertebrae. Each flange projects laterally beyond the spacer at at least one region of the spacer for reducing surface pressure exerted by the spacer on the vertebrae, at least one flange defining an aperture therein within a region of the hollow channel, the aperture being configured to receive a substrate therein for supporting the natural bone substance, the flanges further defining at least one perforation within a region thereof projecting laterally beyond the spacer through which the natural bone substance may grow along an outside region of the spacer.
Inventors
- 👤 Luca Papavero
- 👤 Curt Kranz
- 👤 Gerd Steur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4455; A61F2/4465; A61F2/447; A61F2/30721; A61F2/30724; A61F2/28; A61F2002/2817; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30118; A61F2002/30138; A61F2002/30154; A61F2002/30199; A61F2002/30224; A61F2002/30225; A61F2002/30235; A61F2002/30316; A61F2002/30535; A61F2002/30574; A61F2002/30576; A61F2002/30578; A61F2002/30593; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/3082; A61F2/30907; A61F2002/30909; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0017; A61F2230/0021; A61F2230/0063; A61F2230/0069; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00179; Y; Y10; Y10S; Y10S606/00; Y10S606/907
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
139 words
An intervertebral implant for insertion between adjacent vertebrae comprising: a spacer having two end faces and defining a continuous hollow channel therein adapted to receive natural bone substance; flanges disposed on respective end faces of the spacer and extending in each respective end plane thereof for connection to the adjacent vertebrae, each flange projecting laterally beyond the spacer at at least one region of the spacer for reducing surface pressure exerted by the spacer on the vertebrae, at least one flange defining an aperture therein within a region of the hollow channel, the aperture being adapted to receive a substrate therein for supporting the natural bone substance, the flanges further defining at least one perforation within a region thereof projecting laterally beyond the spacer for receiving natural bone substance which may grow along an outside region of the spacer.
Claim 2
Dependent Claim
139 words
An intervertebral implant for insertion between adjacent vertebrae comprising: a spacer having two end faces and defining a continuous hollow channel therein adapted to receive natural bone substance; flanges disposed on respective end faces of the spacer and extending in each respective end plane thereof for connection to the adjacent vertebrae, each flange projecting laterally beyond the spacer at at least one region of the spacer for reducing surface pressure exerted by the spacer on the vertebrae, at least one flange defining an aperture therein within a region of the hollow channel, the aperture being adapted to receive a substrate therein for supporting the natural bone substance, the flanges further defining at least one perforation within a region thereof projecting laterally beyond the spacer for receiving natural bone substance which may grow along an outside region of the spacer.
Claim 3
Dependent Claim
25 words
The implant according to claim 1, wherein the spacer has a substantially tubular shape and a substantially constant internal cross-section along a longitudinal direction thereof.
Claim 4
Dependent Claim
20 words
The implant according to claim 1, further comprising a substrate disposed in the aperture of the at least one flange.
Claim 5
Dependent Claim
35 words
The implant according to claim 3, wherein an internal cross section of the hollow channel is equal to or larger than an outer cross section of the substrate along a longitudinal direction of the spacer.
Claim 6
Dependent Claim
25 words
The implant according to claim 1, wherein an internal cross section of the hollow channel along a longitudinal direction of the spacer is substantially circular.
Claim 7
Dependent Claim
12 words
The implant according to claim 1, wherein the spacer is substantially rigid.
Claim 8
Dependent Claim
23 words
The implant according to claim 1, wherein the spacer has a resilience which largely corresponds to a resilience of the natural bone substance.
Claim 9
Dependent Claim
24 words
The implant according to claim 1, wherein the spacer defines at least one perforation facing in a radial direction for increasing a resilience thereof.
Claim 10
Dependent Claim
26 words
The implant according to claim 8, wherein the spacer is configured as a meshed cage for allowing the natural bone substance to grow into the cage.
Claim 11
Dependent Claim
35 words
The implant according to claim 1, wherein the flanges are substantially parallel to one another or at a slight angle with respect to one another to conform with a natural curvature of a vertebral column.
Claim 12
Dependent Claim
18 words
The implant according to claim 1, wherein the implant is made of a titanium or a titanium alloy.
Claim 13
Dependent Claim
15 words
The implant according to claim 3, wherein the substrate is made of a porous material.
Claim 14
Dependent Claim
19 words
The implant according to claim 3, wherein the substrate is made of a ceramics material burnt from bovine spongiosa.
Claim 15
Dependent Claim
15 words
The implant according to claim 3, wherein the substrate contains substances which promote bone growth.
Claim 16
Dependent Claim
25 words
The implant according to claim 1, wherein at least one of the flanges defines a surface profile on a side thereon facing a corresponding vertebra.
Claim 17
Dependent Claim
17 words
The implant according to claim 15, wherein the surface profile comprises a plurality of circumferentially extending grooves.
Claim 18
Dependent Claim
25 words
The implant according to claim 1, further comprising anchorage elements adapted to be fastened to the plates for positively connecting the plates to the vertebrae.
Claim 19
Dependent Claim
13 words
The implant according to claim 17, wherein the anchorage elements comprise bone screws.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |