Reverse shoulder systems and methods
AssigneeTornier SAS
InventorsShawn M. Gargac, Brian C. Hodorek, William Matthew Kuester, Austin Wyatt Mutchler
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Abstract
Reversed glenoid implants, and related kits and methods, are described that include an anchor member having a proximal head and a baseplate having a distal end with a first aperture sized to accept the proximal head of the anchor member. The proximal head is inserted along an un-threaded length thereof from the distal end into the first aperture, and the anchor member is restrained against axial translation with respect to the baseplate but is permitted to rotate with respect to the baseplate.
Claims8
A glenoid implant for a shoulder prosthesis comprising:
- an anchor member comprising a longitudinal portion configured to be secured to a bone and a proximal head comprising an external threaded surface;
- a baseplate comprising a proximal end and a distal end, wherein the distal end comprises a first aperture sized to accept the proximal head of the anchor member, the first aperture comprising an internal threaded surface and a space disposed proximal of the internal threaded surface;
- wherein when the external threaded surface of the proximal head is disposed proximal of the internal threaded surface of the first aperture the anchor member is restrained against axial translation with respect to the baseplate but is rotatable with respect to the anchor member.
A glenoid implant for a shoulder prosthesis comprising:
- a baseplate comprising a proximal end, a distal end, an outer periphery, and an aperture that extends therethrough adjacent to the outer periphery from the proximal end to a bone engaging surface;
- an internal member disposed in the baseplate comprising an internal threaded surface surrounding the aperture;
- and
- a screw configured to be placed through the aperture, the screw having an external threaded surface;
- wherein a first number of thread starts disposed on the internal threaded surface of the internal member is greater than a second number of thread starts disposed on the external threaded surface of the screw;
- and
- wherein the threads of the external threaded surface of the screw have a constant thread-form along the length thereof.
Dependencies are inferred from the claim text.