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US 9,872,775 B2Granted
Apparatus for trialing a modular humeral head
AssigneeBiomet Manufacturing, LLC
InventorNathan A. Winslow
Life of this patent
Estimating the term…
Abstract
The present disclosure is directed to a modular shoulder prosthesis measuring device having an adjustable radial offset provided by relative rotation of an adapter interdisposed between the stem and the head. Specifically, the interface configuration between the stem and the adapter, as well as between the adapter and the head are designed such that relative positioning of these components provides a continuous adjustment in the radial offset. Indicia are provided to precisely determine the magnitude and direction of the adjustment being made.
Claims10
An adjustable prosthesis comprising:
- a stem having a proximal face;
- a humeral head having an articulation surface and a bottom face opposite the articulation surface, the bottom face defining an elongated aperture having first and second ends defining a generally flat interface surface;
- and
- an adapter interposed between the proximal face and the bottom face, the adapter defining a cylindrical coupling tapered portion having a centerline which is generally perpendicular to the interface surface, the adapter having a generally planar bearing surface configured to engage the interface surface so as to allow continuous linear movement of the generally planar bearing surface with respect to the interface surface and of the humeral head with respect to the adapter from a first position to a second position in a direction perpendicular to the centerline and within the elongated aperture, the adapter and elongated aperture defining a variable sized cavity therebetween when the generally planar bearing surface is engaged with the interface surface.
1 more element
Dependencies are inferred from the claim text.