US6156067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Human spinal disc prosthesis
Assignee: Medtronic Sofamor Danek Inc
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Filing: 1997-05-15
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Granted: 2000-12-05
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Expires: 2017-05-15
Abstract
Abstract The invention relates to a spinal disc endoprosthesis. The endoprosthesis has a resilient body formed of one or more materials which may vary in stiffness from a relatively stiff exterior annular gasket portion to a relatively supple central nucleus portion. Concaval-convex elements at least partly surround that nucleus portion so as to retain the nucleus portion and gasket between adjacent vertebral bodies in a patient's spine. Assemblies of endoprosthetic discs, endoprosthetic vertebral bodies, and endoprosthetic longitudinal ligaments may be constructed. To implant this endoprosthesis assembly, information is obtained regarding the size, shape, and nature of a patient's damaged spine. Thereafter, one or more prosthetic vertebral bodies and disc units are constructed in conformity with that information. Finally, the completed and conformed vertebral body and disc assembly is implanted in the patient's spine.
Inventors
- 👤 Vincent Bryan
- 👤 Alex Kunzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:36
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30742; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/686; A61F2/44; A61F2/442; A61F2/4425; A61B17/70; A61B17/7059; A61B17/84; A61B17/86; A61B2017/00004; A61F2/08; A61F2/30767; A61F2/30771; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30016; A61F2002/3006; A61F2002/30069; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30159; A61F2002/30168; A61F2002/30199; A61F2002/302; A61F2002/30205; A61F2002/30214; A61F2002/30224; A61F2002/30235; A61F2002/30252; A61F2002/30253; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30405; A61F2002/30433; A61F2002/30448; A61F2002/30451; A61F2002/30461; A61F2002/30462; A61F2002/30469; A61F2002/30474; A61F2002/30476; A61F2002/30487; A61F2002/30495; A61F2002/30507; A61F2002/30535; A61F2002/30563; A61F2002/30576; A61F2002/30578; A61F2002/30579; A61F2002/30594; A61F2002/30599; A61F2002/30621; A61F2002/30624; A61F2002/30649; A61F2002/30663; A61F2002/30772; A61F2002/30784; A61F2002/30785; A61F2002/443; A61F2002/449; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2220/005; A61F2220/0058; A61F2220/0075; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0028; A61F2230/0043; A61F2230/0063; A61F2230/0065; A61F2230/0067; A61F2230/0069; A61F2230/0073; A61F2230/0076; A61F2250/00; A61F2250/0014; A61F2250/0019; A61F2250/0058; A61F2250/006; A61F2250/0063; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00029; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A vertebral disc endoprosthesis comprising relatively rigid superior and inferior concaval-convex elements, each element having an outer surface of predetermined convexity and unreticulated surface roughness for engaging adjacent bone structure which has been milled to mate with said outer convex surface for encouraging bone ingrowth into the mating outer convex surface, each concaval-convex element also having a continuous, smooth non-porous inner concave surface extending substantially across the entire concaval-convex element, and disposed to confront the opposed concaval-convex element smooth concave surface; the endoprosthesis also comprising a solid but relatively resilient convex nuclear body located between the confronting concave surfaces of the adjacent concaval-convex elements, the nuclear body engaging but being separate from the adjacent concave surfaces to permit sliding arcuate movement of the concave surfaces over the resilient nuclear body.
Claim 2
Dependent Claim
130 words
A vertebral disc endoprosthesis comprising relatively rigid superior and inferior concaval-convex elements, each element having an outer surface of predetermined convexity and unreticulated surface roughness for engaging adjacent bone structure which has been milled to mate with said outer convex surface for encouraging bone ingrowth into the mating outer convex surface, each concaval-convex element also having a continuous, smooth non-porous inner concave surface extending substantially across the entire concaval-convex element, and disposed to confront the opposed concaval-convex element smooth concave surface; the endoprosthesis also comprising a solid but relatively resilient convex nuclear body located between the confronting concave surfaces of the adjacent concaval-convex elements, the nuclear body engaging but being separate from the adjacent concave surfaces to permit sliding arcuate movement of the concave surfaces over the resilient nuclear body.
Claim 3
Dependent Claim
18 words
The vertebral disc endoprosthesis according to claim 1 wherein each concaval-convex element is of relatively constant cross-sectional thickness.
Claim 4
Dependent Claim
48 words
The vertebral disc endoprosthesis according to claim 1 wherein said resilient nuclear body comprises a relatively resilient central body, wherein the endoprosthesis further includes a gasket surrounding a circumference of the central body, the resilient nuclear body snugly engaging the adjacent, mating concave surfaces of the concaval-convex elements.
Claim 5
Dependent Claim
18 words
The vertebral disc endoprosthesis according to claim 3 wherein the gasket is stiffer than the resilient nuclear body.
Claim 6
Dependent Claim
17 words
The vertebral disc endoprosthesis according to claim 3 wherein the concaval-convex elements do not engage one another.
Claim 7
Dependent Claim
37 words
The vertebral disc endoprosthesis according to claim 1 wherein the resilient convex nuclear body is shaped and sized, relative to the concave surfaces of the concaval-convex elements, so as to be inhibited from expulsion from the endoprosthesis.
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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) | 2003-12-05 | 2004-06-05 | 2004-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-05 | 2008-06-05 | 2008-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-05 | 2012-06-05 | 2012-12-05 | $7700.00 | Window Closed / Lapsed |