Posterior pedicle screw and plate system and methods

Details Posterior pedicle screw and plate system and methods Posterior pedicle screw and plate system and methods

A - Human Necessities

61

B

A61B 17/70 (2006.01) A61B 17/80 (2006.01)

Patent

CA 2517367

An apparatus is provided for correcting spinal abnormalities, and particularly for providing compression and/or distraction of vertebrae without additional tools or instrumentation. A, plate member (20) is provided with a plurality of slots (30,32), one of which has a sloped internal edge or surface (50). The plate is anchored to one vertebra by a first anchor (22), and a second anchor (24) is then placed through the slot with the sloped internal edge or surface and tightened. Such tightening causes the plate to move with respect to the tightened anchor, and thus to transmit compression or distraction to the vertebrae. The apparatus is particularly useful in minimally-invasive surgeries but can also be used in more traditional open surgeries.

La présente invention a trait à un appareil pour la correction d'anomalies du rachis, et notamment par la réalisation de compression et/ou de distraction des vertèbres sans l'aide d'outils ou d'instruments additionnels. Un organe de plaque (20) est muni d'une pluralité de fentes (30, 32), dont une présente un bord ou une surface inclinée (50). La plaque est ancrée à une vertèbre par un premier ancrage (22), et un deuxième ancrage (24) est ensuite placé à travers la fente à bord ou surface inclinée et serré. Un tel serrage déplace la plaque par rapport à l'ancrage serré, permettant ainsi la transmission de la compression ou distraction aux vertèbres. L'appareil est particulièrement utile dans des interventions chirurgicales à invasion minimale mais peut également être utilisé dans des interventions de chirurgie ouverte classiques.

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