A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 17/56 (2006.01) A61B 17/58 (2006.01) A61F 2/30 (2006.01)
Patent
CA 2612943
A dynamic fixation device is provided that allows the vertebrae to which it is attached to move in flexion within the normal physiological limits of motion, while also providing structural support that limits the amount of translation motion beyond normal physiological limits. The present invention includes a flexible portion and two ends that are adapted for connection to pedicle screws. In at least one embodiment of the present invention, the normal axis of rotation of the vertebrae is substantially duplicated by the dynamic fixation device. The flexible portion of the dynamic fixation device can include a flexible anterior-posterior segment, an anterior-posterior segment bounded by one or more zones with cuts in the rod portions, a flexible accordion-like segment, and/or a hinge portion.
L'invention concerne un dispositif de fixation dynamique permettant aux vertèbres auxquelles ce dispositif est attaché de fléchir dans les limites de mouvement physiologiques normales, tout en fournissant un support de structure qui limite la quantité de mouvement de translation au-delà de limites physiologiques normales. La présente invention comporte une partie flexible et deux extrémités adaptées pour être reliées à des vis de pédicule. Selon au moins un mode de réalisation de ladite invention, l'axe de rotation normal des vertèbres est sensiblement reproduit par ce dispositif de fixation dynamique. La partie flexible dudit dispositif de fixation dynamique peut comporter un segment antéro-postérieur flexible, un segment antéro-postérieur lié par une ou plusieurs zones avec des entailles dans les parties tiges, un segment en accordéon flexible et/ou une partie articulation.
Ritland Stephen
Parlee Mclaws Llp
Ritland Stephen
LandOfFree
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