Off-axis anchor guidance system

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/86 (2006.01) A61B 17/88 (2006.01)

Patent

CA 2587570

Disclosed is a guided bone anchoring device (10) comprising a head, a shank (26) and a passage (34) for receiving a guide wire, the passage (34) having a longitudinal center axis which is not concentric to the longitudinal center axis of the shank (26). Also disclosed is a system for guiding bone anchors, the system comprising: a guide wire, an anchor comprised of a shank wherein the shank has an offset bore at the distal end which is adapted to allow the guide wire to slide through the bore, a dilator having a longitudinal slot wherein the longitudinal slot allows the guide wire to extend through the longitudinal slot when the anchor is positioned within the dilator, and a driving device which is adapted to engage the proximal end of the anchor.

L'invention concerne un dispositif d'ancrage osseux guidé (10) comprenant une tête, une tige (26) et un passage (34) pour recevoir un fil guide, le passage (34) présentant un axe central longitudinal qui n'est pas concentrique à l'axe central longitudinal de la tige (26). L'invention concerne également un système pour guider des ancres osseuses. Ce système comprend: un fil guide, une ancre constituée d'une tige, laquelle tige présentant un alésage décalé à l'extrémité distale, qui est adapté pour permettre au fil guide de coulisser dans l'alésage, un dilatateur présentant une fente longitudinale, laquelle fente longitudinale permettant au fil guide de traverser la fente longitudinale en s'étendant, lorsque l'ancre est positionnée à l'intérieur du dilatateur, et un dispositif d'entraînement qui est adapté pour être en contact avec l'extrémité proximale de l'ancre.

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