PEDICLE SCREW WITH RADIALLY OFFSET GUIDEWAY

摘要

A bone screw includes a screw head and a seating sleeve or tulip on the screw head. The bone screw includes two sleeve flanks having a thread. A seat for a rod for surgical connection of adjacent bone screws is formed between the sleeve flanks. On at least one of the sleeve flanks, a guide surface extending in the circumferential direction for a clamping screw to be screwed into the thread is configured on the run-in side, with the guide surface offset in the radial direction vis-à-vis the thread diameter of the female thread.

主权项

1. A bone screw comprising:
a screw head; a seating sleeve or tulip provided on the screw head and having two sleeve flanks provided with a thread between which sleeve flanks a slit-shaped seat for a rod is formed for surgical connection of adjacent bone screws; and a guide surface formed on a run-in side on at least one of the sleeve flanks, the guide surface extending in a circumferential direction for a clamping screw adapted to be screwed into the thread, the guide surface either being offset vis-à-vis a thread diameter of the thread in a radial direction or the guide surface having a varied diameter.