Sdgi Holdings, Inc.

Sofamor S.n.c.

Remi Cavagna

Denis Huten

Hugues Malandain

Jose Gournay

The tightening instrument is made up of two parts () joined to each other by means which are designed to automatically uncouple the said two parts () by shearing rupture of a pin () when a predetermined tightening torque is reached, a first () of the two parts being provided with a means () permitting driving, characterized in that the second () of the two parts is a rod whose end () opposite its tightening end () is adapted to be introduced into a complementary recess () formed in the first part (), and in that the said end () includes an axial reservoir () for receiving the broken end section () of the pin ().

Tightening instrument for orthopaedic surgery of the spine

This invention is a pedicle screw (), comprising a threaded rod () having a longitudinal axis (XX) and a head () in which there is a channel () adapted to receive a spinal support rod, and a means for blocking the rod; the channel is formed such that its longitudinal axial plane (P) is inclined relative to the longitudinal axis (XX) of the threaded rod. The head () of the screw being made up of two flanks (), a threaded hole () is formed in one of them; the inclination of the channel () relative to the axis of the treaded rod () makes it possible to place a tool for blocking the rod in the channel without this tool coming into contact with the muscle tissues delimiting the incision. Moreover, the threaded seat () permits the positioning of instruments without obstructing the channel for passage of the rod.

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Ploemeur, France

Remi Cavagna