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US 7,547,327 B2Granted
Expandable augment trial
AssigneeHowmedica Osteonics Corp.
InventorCarlos E. Collazo
Life of this patent
Estimating the term…
Abstract
An expandable trial augment, a trial including an augment and a method for using an expandable trial augment are provided. The trial augment is preferably biased to expand in at least one direction.
Claims21
An assembly comprising:
- a femoral trial implant including a condylar portion having an articular surface and a bone-facing cavity and;
- an orthopaedic trial augment for engaging the bone-facing cavity in the condylar portion of the femoral trial implant component, the orthopaedic trial augment comprising:
- a first block including at least one channel;
- a second block including at least one complementary surface for at least partial reception in the at least one channel of the first block to provide for sliding movement between the first and second blocks;
- and
- an expansion member directly connected with the first block and the second block so that the trial augment is expandable in at least one direction,
- wherein the first and second blocks are sized to engage the bone-facing cavity, form a substantially flat bone-facing surface which is coplanar with a bone surface, and are biased such that the blocks expand in the at least one direction.
4 more elements
An assembly comprising:
- a femoral trial implant including a condylar portion having an articular surface and a bone-facing cavity and;
- an orthopaedic trial augment for engaging the bone-facing cavity in the condylar portion of the femoral trial implant component, the orthopaedic trial augment comprising:
- a first block having an end portion for engaging an anterior end of the cavity in the condylar portion;
- a second block having an end portion for engaging a posterior end of the cavity in the condylar portion, the second block keyed to fit inside the first block to permit sliding movement between the two blocks in at least one direction;
- a spring element directly engaging the first and second blocks for moving the ends of the first and second blocks into biased engagement with the anterior and posterior ends of the cavity;
- and
- at least one of the first and second blocks having a substantially flat and proximally facing bone contacting surface which is coplanar with a bone surface,
- wherein first and second blocks are sized to engage the bone-facing cavity.
5 more elements
Dependencies are inferred from the claim text.