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US 5,534,030 AGranted
Spine disc
AssigneeAcroMed Corporation
InventorsRichard R. Navarro, Carl R. McMillin, Karl B. Zimmers
Life of this patent
Estimating the term…
Abstract
A spinal disc prosthesis comprises an upper rigid plate, a lower rigid plate, and an elastomeric core interposed between the plates and adhered to the plates. The elastomeric core has an upper portion with an outer peripheral surface extending substantially perpendicular to the upper plate. A lower portion of the elastomeric core has an outer peripheral surface extending substantially perpendicular to the lower plate. An intermediate portion of the elastomeric core, extending between the upper and lower portions, has a concave outer peripheral surface. Each of the upper and lower plates has a plurality of ribs extending into the elastomeric core to secure the elastomeric core to the upper and lower plates.
Claims18
A spinal disc prosthesis to replace a damaged spinal disc comprising:
- an upper rigid plate;
- a lower rigid plate;
- an elastomeric core interposed between said plates and adhered to said plates, said elastomeric core comprising an upper portion extending from said upper plate toward said lower plate, said upper portion of said core having an outer peripheral surface extending from said upper plate and substantially perpendicular to said upper plate, a lower portion extending from said lower plate toward said upper plate, said lower portion of said core having an outer peripheral surface extending from said lower plate and substantially perpendicular to said lower plate, and an intermediate portion extending between said upper and lower portions, said intermediate portion having a concave outer peripheral surface extending between said outer peripheral surfaces of said upper and lower portions of said core and defining a groove extending around said core and located between said upper and lower portions of said core.
A spinal disc prosthesis to replace a damaged disc comprising:
- an upper rigid plate;
- a lower rigid plate;
- a resilient elastomeric core interposed between said plates and adhered to said plates;
- and
- each of said upper and lower plates having a surface facing toward said resilient elastomeric core and including at least one rib extending along said surface, said rib having a thickness measured from said plate toward said resilient elastomeric core and a length measured along said surface of said plate, the length of said rib being greater than the thickness of said rib, said rib being adhered to and extending into said resilient elastomeric core to resist separation of said plates and core.
2 more elements
A spinal disc prosthesis to replace a damaged spinal disc comprising:
- an upper rigid plate;
- a lower rigid plate;
- and
- an elastomeric core interposed between said plates and adhered to said plates, said elastomeric core comprising an upper portion extending from said upper plate toward said lower plate, said upper portion of said core having an outer peripheral surface extending substantially perpendicular to said upper plate, a lower portion extending from said lower plate toward said upper plate, said lower portion of said core having an outer peripheral surface extending substantially perpendicular to said lower plate, and an intermediate portion extending between said upper and lower portions, said intermediate portion having a concave outer peripheral surface extending between said outer peripheral surfaces of said upper and lower portions of said core and defining a groove extending around said core and located between said upper and lower portions of said core;
- each of said plates including at least one rib adhered to and extending into said elastomeric core, said plate having an outer peripheral surface with a shape, said rib having substantially the same shape as said outer peripheral surface of said plate.
2 more elements
A spinal disc prosthesis to replace a damaged disc comprising:
- an upper rigid plate;
- a lower rigid plate;
- a resilient elastomeric core interposed between said plates and adhered to said plates;
- and
- each of said upper and lower plates having a surface facing toward said resilient elastomeric core and including at least one rib extending along said surface, said rib having a thickness measured from said plate toward said resilient elastomeric core and a length measured along said surface of said plate, the length of said rib being greater than the thickness of said rib, said rib being adhered to and extending into said resilient elastomeric core to resist separation of said plates and core;
- said plate having an outer peripheral surface with a shape, said rib having substantially the same shape as said outer peripheral surface of said plate.
3 more elements
A spinal disc prosthesis to replace a damaged disc comprising:
- an upper rigid plate;
- a lower rigid plate;
- a resilient elastomeric core interposed between said plates and adhered to said plates;
- and
- each of said upper and lower plates having a surface facing toward said resilient elastomeric core and including a plurality of ribs extending along said surface, said ribs having a thickness measured from said plate toward said resilient elastomeric core and a length measured along said surface of said plate, the length of said ribs being greater than the thickness of said ribs, said ribs being adhered to and extending into said resilient elastomeric core to resist separation of said plates and core;
- said plate having an outer peripheral surface with a shape, said plurality of ribs being concentric and having substantially the same shape as said outer peripheral surface of said plate.
3 more elements
A spinal disc prosthesis to replace a damaged spinal disc comprising:
- an upper rigid plate;
- a lower rigid plate;
- an elastomeric core interposed between said plates and adhered to said plates, said elastomeric core comprising an upper portion extending from said upper plate toward said lower plate, said upper portion of said core having an outer peripheral surface with a substantial portion extending substantially perpendicular to said upper plate, a lower portion extending from said lower plate toward said upper plate, said lower portion of said core having an outer peripheral surface with a substantial portion extending substantially perpendicular to said lower plate, and an intermediate portion extending between said upper and lower portions, said intermediate portion having a concave outer peripheral surface extending between said outer peripheral surfaces of said upper and lower portions of said core and defining a groove extending around said core and located between said upper and lower portions of said core.
Dependencies are inferred from the claim text.