| 摘要 |
Assemblies, systems and components for a bi-polar bone anchor assembly. A receiver member includes a central aperture with upper and lower openings and a transverse channel. A bi-polar member and a bone anchor are loaded into the bottom of the receiver member and an internal threaded ring member fits over the outer lower threaded portion of the receiver member to retain the bi-polar member and the bone anchor therein. The bone anchor is capable of multi-axial and multi-polar positioning with respect to the receiver member. An elongated member may be placed in the channel of the receiver member in contact with the bone anchor member and a retaining member may be applied via the upper opening to press down on the elongated member thereby, locking the bone anchor member in place with the retaining member, bi-polar member, and receiver member.
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