Ulnar Head Replacement Implant System
AssigneeAscension Orthopedics, Inc.
InventorsJerome J. Klawitter, Monti R. Gourley
Life of this patent
Estimating the term…
Abstract
Embodiments of the invention may provide a stem and a head and a liner that can be assembled together to form an implant, such as may be used in repair of the distal ulnoradial joint. A given head and liner and stem may be assembled to each other in more than one configuration, providing more than one possible external shape for a given set of stem and head and liner. The head may be non-symmetric about its midplane and may be open at both ends. A kit may contain more than one head assemblable to a given stem with an intermediate liner, with the various heads providing various different external shapes of the device.
Claims15
An orthopedic device comprising:
- a stem for engaging a bone;
- a first head having a having a longitudinal centerline and having a first head external shape;
- and
- wherein said first head can be assembled to said stem in a first configuration providing a first device external shape and wherein said first head can be assembled to said stem in a second configuration providing a second device external shape different from said first device external shape.
An orthopedic device comprising:
- a stem for engaging a bone;
- to first head having a longitudinal centerline and having a first head external shape;
- and
- wherein a first bounding plane is defined as a plane perpendicular to said longitudinal centerline that non-intersectingly touches said first head from a first direction, and a second bounding plane is defined as a plane perpendicular to said longitudinal centerline that non-intersectingly touches said first head from a second direction opposed to said first direction, and wherein a midplane is defined as a plane that is midway between said first bounding plane and said second bounding plane while being parallel to said first bounding plane and said second bounding plane, and
- wherein an external shape of said first head is not symmetric with respect to said midplane, and
- wherein said first head has a hole completely therethrough.
Dependencies are inferred from the claim text.