Elbow arthroplasty apparatus, system, and method
Inventors
Bergquist, Jeff • Martin, Caleb • Sommers, Mark • Morse, Bryon
Assignees
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Publication Number
US-12186196-B2
Publication Date
2025-01-07
Expiration Date
Abstract
The present disclosure generally relates to an elbow arthoplasty prosthesis that includes an ulnar component, a humeral component, one or more articulation liners, and a retention trap. The ulnar component includes a spherical bearing head that can be inserted into the humeral component in a number of orientations. The articulation liners and the retention trap are operatively engaged to the humeral component to retain the ulnar component within a humeral socket. The present disclosure also relates to methods of assembling and implanting the prosthetic device.
Core Innovation
The disclosed elbow arthroplasty prosthesis includes an ulnar component having a bearing end and an ulnar stem, and a humeral component having a holder end and a humeral stem. The humeral holder end includes yoke branches that define a spherical socket, and the bearing end is configured to be coupled within the holder end to articulate against one or more bearing liners, supporting an elbow articulation formed by the spherical coupling between the bearing head and the humeral socket.
One or more articulation liners are fixed within the humeral socket. The liner arrangement is configured for retention relative to the humeral component, including locking engagement that prevents undesired liner rotation after coupling. A retention trap is included and is inserted and rotated relative to the humeral component to lock the ulnar component within the humeral component, thereby locking the bearing liner and the ulnar bearing head in place.
The assembly concept uses a retention trap that is rotated to lock, including retention-trap operation using a tool bore for rotating the retention trap during assembly and removal. The described coupling includes attachment of the ulnar component to the humeral component by rotating the ulnar component from a hyperextension position into flexion and then locking the ulnar bearing head within the humeral socket without retrograde rotation.
Claims Coverage
The partial content identifies two independent methods for implanting an elbow prosthesis. Across the independent claims, the main inventive features include coupling an ulnar component to a humeral component for articulation against at least one bearing liner, and using a retention trap with rotation and locking features to secure the ulnar component and bearing liner to the humeral component.
Retention trap rotation to lock ulnar component within humeral component
attaching the ulnar component to the humeral component includes rotating the retention trap relative to the humeral component thereby locking the ulnar component within the humeral component
Bearing liner positioned in humeral holder end and rotatably coupled ulnar component for articulation
at least one bearing liner is positioned within the holder end and the bearing end is configured to be rotatably coupled within the holder end and articulate against the at least one bearing liner
Locking flange and locking shoulder engagement to secure bearing liner
securing the at least one bearing liner to an inner surface of the holder end by rotating the at least one bearing liner within the humeral component to engage a locking flange of the at least one bearing liner with a locking shoulder of the humeral component
Rotating retention trap and bearing liner relative to humeral component to lock
rotating the retention trap and the at least one bearing liner relative to the humeral component to lock the retention trap and the at least one bearing liner to the humeral component
Retention trap inserted into holder end to lock liner and ulnar coupling
inserting the retention trap into the holder end
Both independent claims focus on implanting an elbow prosthesis in which an ulnar component is rotatably coupled to a humeral component to articulate against at least one bearing liner, and a retention trap is used by rotating, and in one claim inserting the retention trap and rotating the retention trap and bearing liner, to lock the ulnar component and associated bearing liner(s) to the humeral component.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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