Modular prosthetic head having a flat portion to be implanted into a constrained liner
AssigneeBiomet Manufacturing, LLC
InventorsPhillip Gibbs, W. Slone, Troy Hershberger, Kim Parcher
Life of this patent
Estimating the term…
Abstract
A constraining prosthesis to reduce the possibility of a dislocation of the prosthesis after implantation is taught. A constraining liner is taught to include a constraining passage smaller than an internal diameter of the liner. A head can include a portion that is small enough to be positioned into the liner. The head can include a second dimension that is greater than the opening to constrain the modular head within the liner. A kit is also taught for trialing prosthesis to provide and determine a customized and personal fit of the prosthesis for each patient.
Claims27
A prosthesis for replacement of a natural joint in an anatomy that can resist dislocation, the prosthesis comprising:
- a liner defining an internal void portion defining an internal void dimension, and defining a constraining opening having a passage dimension smaller than the internal void dimension;
- a head portion having a head dimension complementary to the internal void dimension;
- wherein the head portion includes a passage portion having a dimension similar to the passage dimension;
- wherein the head portion is operable to be implanted into the internal void portion during an operative procedure.
A prosthesis for replacement of a natural joint in an anatomy, the prosthesis comprising:
- a first member having an internal wall defining an internal void having an internal void dimension;
- a second member having a second dimension and defining a passage portion and operable to articulate with the internal wall;
- a third member operable to be fixed relative to the first member and articulate with the anatomy;
- wherein the second member is adapted to be implanted in the first member relative to the internal wall during an operative procedure;
- wherein the passage portion is operable to substantially ensure contact with less than the entire internal wall.
A method of positioning a prosthesis relative to a selected boney portion to replace a natural joint, the method comprising:
- positioning a first member relative to the boney portion and the first member defining an internal void and a passable portion defining a passage dimension;
- positioning a second member relative to a boney portion defining a first dimension operable to be positioned relative to the internal void and defining a passage portion defining a passage dimension having a selected orientation relative to the second member and operable to pass through the passable portion, wherein the passage dimension is less than the first dimension;
- orienting the second member such that the passage portion is generally aligned with the passage portion;
- positioning the second member in the internal void;
- wherein the second member is substantially held within the internal void.
Dependencies are inferred from the claim text.