Fastening system for pedicel screws

Details Fastening system for pedicel screws Fastening system for pedicel screws

1996-01-30

1998-04-07

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

606 70, 606 71, 606 73, A61B 1756

Patent

active

057358508

ABSTRACT:
The invention discloses a fastening system for pedicel screws anchorable in different vertebrae. The spherical screw heads lie in spherical shells of apertured counter-bodies. The counter-bodies have planar support surfaces which lie on a supporting link in the region of elongate holes. A screw element is provided in the axial direction of each pedicel screw and is pivotably journalled at the supporting link with a spherical support surface arranged in the region of the elongate hole. The pedicel screws are generally skewed relative to one another and can, when account is taken of the nature of the bone, be rigidly connected to the supporting links via the screw elements due to the fact that the support surfaces can be clamped against one another in a self-locking manner on pedicel screws which are positioned inclined relative to the support surfaces.

REFERENCES:
patent: 2443363 (1948-06-01), Townsend et al.
patent: 2780223 (1957-02-01), Haggland
patent: 4696290 (1987-09-01), Steffee
patent: 5129899 (1992-07-01), Small et al.
patent: 5269784 (1993-12-01), Mast
patent: 5344421 (1994-09-01), Crook
patent: 5487741 (1996-01-01), Maruyama et al.

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