Method and apparatus for total wrist angled back carpal plate
AssigneeBiomet, Inc.
InventorsJason M. Shultz, Andrew K. Palmer, Kevin T. Stone
Life of this patent
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Abstract
A prosthetic wrist having a radial insert, which is configured to be fixed to the resected radius of a patient, a carpal implant and a wrist bearing component. The carpal implant includes a body and a pair of flanges, each of which being skewed to the axis of the body in a manner that permits them to abut the ulnar side of the hamate bone and the radial side of the distal portion of the carpal bone complex, respectively. The wrist bearing component may include a bearing surface for contacting the radial insert that is defined by different radii in the coronal and sagittal planes and an alignment mechanism may be employed to fix the wrist bearing component in a desired orientation.
Claims39
A prosthetic wrist comprising:
- a carpal implant having a body, a lateral flange and a medial flange, the body having an axis that is adapted to extend generally parallel an axis of a capitate bone in a human wrist when the prosthetic wrist is implanted, the lateral flange being coupled to the body and,extending therefrom, the medial flange being coupled to the body and extending therefrom, the lateral flange and the medial flange cooperating to provide the carpal implant with a bone abutment surface having a generally concave shape that is configured to abut a lateral side and a medial side, respectively, of at least a portion of a carpal bone complex of the human wrist.
A prosthetic wrist comprising:
- a carpal implant that is adapted to be implanted in at least a portion of a carpal bone complex of a human wrist;
- a wrist bearing component that is configured to be coupled to the carpal implant;
- wherein the carpal implant includes a flange means with a lateral side and a medial side, the flange means being configured to be disposed between the portion of the carpal bone complex and the wrist bearing component such that the lateral side of the flange means extends about a lateral side of the portion of the carpal bone complex and the medial side of the flange means extends about a medial side of the portion of the carpal bone complex, each of the lateral and medial sides defining a bone abutment surface that extends outwardly away from the bearing and forwardly toward a distal end of the portion of the carpal bone complex.
Dependencies are inferred from the claim text.