Patent ID: 8647370
Filing Date: 2014-02-11
Classification: A61B

Abstract:
1. A uniplanar bone anchor system for a fixation procedure comprising: a bone fastener including a head and a shaft adapted to engage an anatomy, the head having a first bearing surface; a saddle extending along a longitudinal axis and having a coupling bore that receives the head of the bone fastener; a support member coupled to a lower portion of the head of the bone fastener, the support member configured to be received in the coupling bore; a pressure cap received in the coupling bore; a locking member received in the coupling bore; and a coupler having a second bearing surface associated with the pressure cap, at least one first engagement surface associated with the head of the bone fastener adjacent the first bearing surface, at least one second engagement surface associated with the pressure cap, a first locking surface associated with the pressure cap and disposed opposite the second bearing surface, and a second locking surface associated with the locking member, the second bearing surface contacting the first bearing surface and the at least one second engagement surface contacting the at least one first engagement surface and such contact between the at least one first engagement surface and the at least one second engagement surface together with the first locking surface engaging the second locking surface permits the bone fastener to move relative to the saddle in only one plane.