Abstract: A top-loading multi-axial, double locking bone anchor assembly. A receiver member receives an internal saddle member, a bi-polar member, and a bone anchor through an open bottom, which are retained by an internal threaded ring member threaded onto the receiver member. A double-locking compression retaining member includes an external nut-like fastener and an internal setscrew-like fastener. The nut-like fastener attaches to an upper portion of the receiver member and interfaces with the internal saddle member to retain a desired angular position on the bone anchor and the setscrew-like fastener interfaces with an elongated member placed in a channel of the receiver member to retain it to the assembly. The bone anchor is capable of multi-axial as well as multi-polar positioning with respect to the receiver member.

Abstract: A transverse connector system for coupling elongate elements to each other in a spinal fixation system. A trans-connector plate with at least one slot-like passage may have top and bottom elongated concave surface configurations. A cylindrical component of a coupling member may be configured to couple with an elongate fixation element by way of a helical slot. A male component on the coupling member may be inserted through the slot like passage and a locking member may be secured thereon to position and orient the coupling member. A second coupling member and locking member may be utilized through a passage in the trans-connector plate, which may be a second slot-like passage. Each locking member cooperates with its respective coupling member to prevent uncoupling, and each may be positioned at a desired lateral position along a slot-like passage.

Abstract: A top-loading multi-axial, double locking bone anchor assembly. A receiver member receives an internal saddle member, a bi-polar member, and a bone anchor through an open bottom, which are retained by an internal threaded ring member threaded onto the receiver member. A double-locking compression retaining member includes an external nut-like fastener and an internal setscrew-like fastener. The nut-like fastener attaches to an upper portion of the receiver member and interfaces with the internal saddle member to retain a desired angular position on the bone anchor and the setscrew-like fastener interfaces with an elongated member placed in a channel of the receiver member to retain it to the assembly. The bone anchor is capable of multi-axial as well as multi-polar positioning with respect to the receiver member.