Total wrist prosthesis and related methods
AssigneeSkeletal Holdings, LLC
InventorsJorge L. Orbay, Edward J. Tremols, Brian A. Cooke
Life of this patent
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Abstract
Disclosed is a wrist prosthesis, and methods for implanting same, the prosthesis comprising radial component having two sides, the first side comprising a stem and the second side comprising a concave dish; a carpal component having two sides, the first side comprising a stem, and the second side comprising a ball end, the ball end being connected to the carpal component through a neck, the neck being narrower than the diameter of the ball end; and a lunate component having two sides, the first side comprising a cavity adapted to receive said carpal component's ball end, and the second side comprising a convex surface adapted to engage said radial component's concave dish.
Claims17
A wrist prosthesis comprising:
- a radial component having two sides, the first side comprising a stem and the second side comprising a concave dish;
- a carpal component having two sides, the first side comprising a stem, and the second side comprising a ball end, the ball end being connected to the carpal component through a neck, the neck being narrower than the diameter of the ball end;
- and
- a lunate component having two sides, the first side comprising a cavity adapted to receive said carpal component's ball end, and the second side comprising a convex surface adapted to engage said radial component's concave dish;
- said lunate component adapted to freely rotate with respect to at least one of said radial component and said carpal component about a longitudinal axis extending through the center of said ball end and substantially parallel to said stem of said carpal component.
A method for surgically implanting a wrist prosthesis comprising the steps of:
- rigidly engaging in the radius bone of a patient a radial component having two sides, the first side comprising a stem and the second side comprising a concave dish, by embedding said stem in said radius bone;
- rigidly engaging in a carpal or metacarpal bone of a patient a carpal component having two sides, the first side comprising a stem, and the second side comprising a ball end, the ball end being connected to the carpal component through a neck, the neck being narrower than the diameter of the ball end, by embedding said stem in said carpal or metacarpal bone;
- attaching to said carpal component's ball end a lunate component having a cavity adapted for such attachment;
- and
- engaging said lunate component with said concave dish of said radial component through a convex surface on said lunate component adapted for such engagement;
- wherein said lunate component is adapted to freely rotate with respect to at least one of said radial component and said carpal component about a longitudinal axis extending through the center of said ball end and substantially parallel to said stem of said carpal component.
Dependencies are inferred from the claim text.