Facet screw anchor

Details Facet screw anchor Facet screw anchor

1994-08-19

1996-06-18

Graysay, Tamara L.

Surgery

Instruments

Orthopedic instrumentation

A61B 1770

Patent

active

055273122

ABSTRACT:
A spinal fixation system comprises a pair of facet screws that extend through the facet joint from the inferior facet of a superior vertebra and into the base of the transverse process of the immediately inferior vertebra. A pair of stabilizing bars are operatively coupled to the screws adjacent their heads. The bars carry fingers that extend in a superior direction and loop over the superior aspect of the pedicle of the superior vertebra. The stabilizing bars thus stabilize the facet screws and prevent their tendency to toggle, thereby conjunctively stabilizing the superior vertebra to the immediately inferior vertebra, for example, to facilitate the healing of a fusion.

REFERENCES:
patent: 3824995 (1974-07-01), Getscher et al.
patent: 4573458 (1986-03-01), Lower
patent: 5087259 (1992-02-01), Krenkel
patent: 5318567 (1994-06-01), Vichard
patent: 5415661 (1995-05-01), Holmes
Friedrich P. Magerl, M.D., "Stabilization of the Lower Thoracic and Lumbar Spine with External Skeletal Fixation," Reprinted from Clinical Orthopaedics, vol. 189 (Oct. 1984).

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