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US 6,719,796 B2Granted
Spinal surgical prosthesis
AssigneeAdvanced Prosthetic Technologies, Inc.
InventorsHoward Cohen, Ladislau Biro, Matthew S. Cohen
Life of this patent
Estimating the term…
Abstract
A prosthesis in the form of a cage having opposed complimentary bearing surface assemblies. The bearing surface assemblies moveable towards and away from each other. The moving mechanism being part of the bearing surface assemblies. Each of the bearing surface assemblies having an outer bearing surface whereby movement of one bearing surface assembly in one direction will move the bearing surface assemblies away from each other and movement in the opposite direction will move the bearing surface assemblies towards each other.
Claims16
A prosthesis comprising:
- (a) at least one set of substantially identical first and second opposed bearing surface assemblies, each of said bearing surface assemblies having a substantially circular outer bearing surface, an inner face opposite to said outer bearing surface and a central axis through said outer bearing surface and said inner face;
- (b) each of said opposed bearing surfaces assemblies having a wall extending substantially normal and away from said inner face, each of said walls having a free end with at least one inclined cam surface, said inclined cam surface of said first bearing surface assembly cooperatively rests against said inclined cam surface of said second bearing surface assembly;
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- (c) means for rotating said bearing surfaces of said first and second opposed bearing surface assemblies co-axially towards and away from each other, said rotating means being integral with the bearing surface assemblies, whereby relative rotational of said opposed bearing surface assemblies around said central co-axis by the rotating means in one direction will move the bearing surfaces of said first and second opposed bearing surface assemblies away from each other and relative rotation of said opposed bearing surface assemblies around said central co-axis by the rotating means in the opposite direction will move the bearing surfaces of said first and second opposed bearing surface assemblies towards each other, thereby increasing and decreasing respectively, the height of said prosthesis along said central co-axis.
1 more element
The combination of a prosthesis and a substance comprising:
- (a) at least one set of first and second opposed bearing surface assemblies, each of said bearing surface assemblies having a substantially circular outer bearing surface, an inner face opposite to said outer bearing surface and a central axis through said outer bearing surface and said inner face;
- (b) each of said opposed bearing surfaces assemblies having a wall extending substantially normal and away from said inner face, each of said walls having a free end with at least one inclined cam surface, said inclined cam surface of said first bearing surface assembly cooperatively rests against said inclined cam surface of said second bearing surface assembly;
- (c) means for rotating said bearing surfaces of said first and second opposed bearing surface assemblies co-axially towards and away from each other, said rotating means being integral with the bearing surface assemblies, whereby relative rotational of said opposed complimentary bearing surface assemblies around said central co-axis by the rotating means in one direction will move the bearing surfaces of said first and second opposed bearing surface assemblies away from each other and relative rotation of said opposed complimentary bearing surface assemblies around said central co-axis by the rotating means in the opposite direction will move the bearing surfaces of said first and second opposed bearing surface assemblies towards each other, thereby increasing and decreasing respectively, the height of said prosthesis along said central co-axis;
- and
- (d) a substance that promotes osseous integration and bone in-growth adjacent to said bearing surface assemblies.
2 more elements
The combination of a prosthesis and a substance comprising:
- (a) at least one set of first and second opposed bearing surface assemblies, each of said bearing surface assemblies having a substantially circular outer bearing surface, an inner face opposite to said outer bearing surface and a central axis through said outer bearing surface and said inner face;
- (b) each of said opposed bearing surfaces having a wall extending substantially normal and away from said inner face, each of said walls having a free end with at least one inclined cam surface, said inclined cam surface of said first bearing surface assembly cooperatively rests against said inclined cam surface of said second bearing surface assembly;
- (c) means for rotating said bearing surfaces of said first and second opposed bearing surface assemblies co-axially towards and away from each other, said rotating means being integral with the bearing surface assemblies, whereby relative rotation of said opposed complimentary bearing surface assemblies around said central co-axis by the rotating means in one direction will move the bearing surfaces of said first and second opposed bearing surface assemblies away from each other and relative rotation of said opposed complimentary bearing surface assemblies around said central co-axis by the rotating means in the opposite direction will move the bearing surfaces of said first and second opposed bearing surface assemblies towards each other, thereby increasing and decreasing respectively, the height of said prosthesis along said central co-axis;
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- (d) a substance with hemostatic factors to control bleeding adjacent to said bearing surface assemblies.
2 more elements
The combination of a prosthesis and a substance comprising:
- (a) at least one set of first and second opposed bearing surface assemblies, each of said bearing surface assemblies having a substantially circular outer bearing surface, an inner face opposite to said outer bearing surface and a central axis through said outer bearing surface and said inner face;
- (b) each of said opposed bearing surfaces having a wall extending substantially normal and away from said inner face, said wall having a free end with at least one inclined cam surface, said inclined cam surface of said first bearing surface assembly cooperatively rests adjacent said inclined cam surface of said second bearing surface assembly;
- (c) means for rotating said bearing surfaces of said first and second opposed bearing surface assemblies co-axially towards and away from each other, said rotating means being integrated with the bearing surface assemblies, whereby relative rotation of said opposed complimentary bearing surface assemblies around said central co-axis by the rotating means in one direction will move the bearing surfaces of said first and second opposed bearing surface assemblies away from each other and relative rotation of said opposed complimentary bearing surface assemblies around said central co-axis by the rotating means in the opposite direction will move the bearing surfaces of said first and second opposed bearing surface assemblies towards each other, thereby increasing and decreasing respectively, the height of said prosthesis along said central co-axis;
- and
- (d) a substance with anti-microbial drugs to control and prevent infection adjacent to said bearing surface assemblies.
2 more elements
Dependencies are inferred from the claim text.