Patent ID: 8419778

Claim:
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 planar sidewall surface opposite a second planar sidewall surface and an arcuate bearing surface extending around an outer perimeter of the head; a saddle extending along a longitudinal axis and having a proximal end and a distal end, the distal end including a first bore formed about the longitudinal axis that receives the head of the bone fastener and at least one coupling bore defined transverse to the longitudinal axis through at least a portion of the distal end, the at least one coupling bore in communication with the first bore; and a coupling system including at least one first pin having a second bearing surface, the at least one first pin received through the at least one coupling bore such that a longitudinal axis of the at least one first pin is perpendicular to a plane parallel to the first and second planar sidewall surfaces and the second bearing surface contacts the arcuate bearing surface of the head to permit the bone fastener to move relative to the saddle in only one plane.