Systems and methods for spinal fixation

Details Systems and methods for spinal fixation Systems and methods for spinal fixation

A - Human Necessities

61

B

A61B 17/70 (2006.01) A61B 17/15 (2006.01) A61B 17/16 (2006.01) A61B 17/17 (2006.01) A61B 17/32 (2006.01) A61B 17/88 (2006.01) A61B 17/92 (2006.01) A61F 2/44 (2006.01) A61F 2/46 (2006.01) A61B 17/00 (2006.01) A61B 17/02 (2006.01) A61B 19/00 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/28 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2373633

Featured are a method and apparatus for fixing adjacent vertebrae of a spine that avoids the need and associated problems with prior cage or straight rod and screw systems. Methods and apparatus of the invention utilize a new implant member, which preferably is arcuate. Preferred methods of the invention for stabilizing adjacent vertebrae of the spine, include steps of providing a positioning apparatus including two guide sleeves, each guide sleeve having a long axis and locating the two guide sleeves with respect to the adjacent vertebrae such that a vertex formed by the long axis of each guide sleeve is located in the intervertebral space for the adjacent vertebrae. The method further includes forming an aperture in each of the adjacent vertebrae using the guide sleeves and inserting an implant into the apertures formed in each of the adjacent vertebrae so that the implant extends between the adjacent vertebrae and through the intervertebral space. In an alternative method a cutting fixture including a pivot arm is secured to the adjacent vertebrae and a cutting device is secured to the pivot arm. The pivot arm and cutting device are configured and arranged so that rotation of the pivot arm about a particularly located pivot point allows the cutting device to form the aperture in each of the adjacent vertebrae. Another alternative method for fixing adjacent vertebrate of a spine includes the step of forming a common channel in and between the adjacent vertebrae and inserting a biscuit implant in the common so as to bridge between the adjacent vertebrae.

La présente invention concerne un procédé et un appareil permettant de fixer les vertèbres adjacentes du rachis en évitant les problèmes associés à l'utilisation des systèmes à cage ou à vis et tige rigide. Les procédés et l'appareil de l'invention font appel à un nouvel élément d'implant (160), de préférence arqué. Selon les procédés préférés de l'invention permettant de stabiliser les vertèbres adjacentes du rachis, on utilise un appareil de positionnement (100) comprenant deux manchons guides (102), chaque manchon (102) possédant un axe long, que l'on dispose par rapport aux vertèbres adjacentes de façon qu'un vertex formé par l'axe long de chaque manchon guide (102) se trouve placé dans l'espace intervertébral entre les vertèbres adjacentes. Le procédé consiste en outre à pratiquer une ouverture dans chacune des vertèbres adjacentes de manière que l'implant (160) s'étende entre les vertèbres adjacentes et à travers l'espace intervertébral.

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