Semi constrained polyaxial endoprosthetic ankle joint replacement implant
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United States of America Patent
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Oct 18, 2016
Grant Date -
Feb 12, 2015
app pub date -
Aug 7, 2014
filing date -
Nov 1, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A semi-constrained polyaxial ankle joint replacement implant has a dual bearing component, a tibial component or plate adapted for attachment to a tibia or fibula bone, and a talar component or plate adapted for attachment to a talus or calceneus bone of the foot. The dual bearing component includes a superior bearing providing gliding articulation/translation between it and the tibial component, and an inferior bearing providing gliding articulation/translation between it and the talar component. The tibial plate has peripheral transversely extending flanges that semi constrain or limit movement relative to the superior bearing and/or vice versa. The inferior bearing has a flange extending upwardly from the superior surface thereof that is received in an opening in the intermediate plate to semi constrain or limit movement relative between the two components.
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