Uniplanar bone anchor system

摘要

The present teachings provide one or more surgical implements for repairing damaged tissue, such as in the case of a spinal fixation procedure. A uniplanar bone anchor system for a fixation procedure is provided. The system can include a bone fastener including a head with a bearing surface and a shaft adapted to engage an anatomy. The system can also include a saddle, which can include a first bore formed about a longitudinal axis that receives the bone fastener and a coupling bore defined transverse to the longitudinal axis. The system can also include a coupling system, which can have a second bearing surface. The coupling system can be received through the coupling bore such that the second bearing surface of the coupling system can contact the bearing surface to permit the bone fastener to move in only one plane.

主权项

1. A uniplanar bone anchor system for a fixation procedure comprising:
a bone fastener having a head and a shaft adapted to engage an anatomy, the head defining at least one bearing surface and further having a first planar head surface opposite a second planar head surface; a saddle extending along a longitudinal axis and having a proximal end and a distal end, the distal end including a central bore formed about the longitudinal axis that receives the head of the bone fastener, a cap located in the central bore of the saddle, the cap having a first planar cap surface, a second planar cap surface, and at least one triangular shaped protrusion; wherein the bone fastener is received within the central bore such that the engagement between the first planar head surface and the first planar cap surface and engagement between the second planar head surface, and the second planar cap surface enables the bone fastener to articulate relative to the saddle in a single plane.