Side mounted polyaxial pedicle screw

Details Side mounted polyaxial pedicle screw Side mounted polyaxial pedicle screw

1996-12-23

1998-07-07

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

606 60, 606 72, 606 73, A61B 1770

Patent

active

057761353

ABSTRACT:
A polyaxial orthopedic device for use with rod implant apparatus includes a screw having a head, a tubular body having holes in the top, side and bottom thereof, and a rod coupling element. The head of the screw is disposed in the body with the shaft of the screw extending out the bottom hole, such that the body and the screw may initially rotate relative to one another. The rod coupling element has a ball shaped end which seats in the body with the remainder of the rod coupling element extending out of the side hole of the body, such that the rod coupling element and the body are initially polyaxially coupled relative to one another. The ball end of the rod coupling element is disposed on top of the head of the screw. A set screw is provided in the top of the body, the tightening of which causes the ball, head, and body to be crush locked together, thereby preventing further relative motion.

REFERENCES:
patent: 5443467 (1995-08-01), Biedermann et al.
patent: 5474551 (1995-12-01), Finn et al.
patent: 5476464 (1995-12-01), Metz-Stavenhagen
patent: 5540688 (1996-07-01), Navas
patent: 5584831 (1996-12-01), McKay

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