Polyaxial pedicle screw having a through bar clamp locking mecha

Details Polyaxial pedicle screw having a through bar clamp locking mecha Polyaxial pedicle screw having a through bar clamp locking mecha

1998-04-30

1999-10-05

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

606 73, A61B 1770

Patent

active

059615184

ABSTRACT:
A polyaxial orthopedic device for use with rod implant apparatus includes a screw having a curvate head, a cross bar mounting element having a socket into which the head of the screw is initially polyaxially nested. The cross bar mounting element further includes a vertical split which permits the socket to be expanded or compressed via the application of a corresponding force directed at the split. The cross bar mounting element further includes a pair of upwardly extending members which define a trough into which a cross bar element is positioned. The cross bar element includes features which permit the secure fixation of a rod thereto, as well as a selectively slideable element, such as a nut, which may be tightened to apply the compressive force necessary to compress the interior volume onto the head of the screw, thus locking the assembly in place.

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