Tool system for dynamic spinal implants

A - Human Necessities – 61 – B

Patent

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A61B 17/88 (2006.01) A61B 17/70 (2006.01)

Patent

CA 2670988

A tool set for implanting bone screws in a human spine, followed by the implantation of a longitudinal connecting member into the bone screws includes a pair of independently mountable and manipulatable elongate guide tools that form a unitary tool guide when desired. Each guide tool includes attachment structure for independent operable connection of the guide tool to an arm of the bone screw. The bone screw/guide tool attachment includes an undercut and/or recess so as to resist separation of the guide tool member from an attached bone screw. A removable stabilizer cooperating with the pair of guide tools places such tools in a set spaced relation to one another when desired. Further tools include a cooperating bone screw driver with an attached stabilizer, a closure starter/reduction tool, a closure driver and a counter torque tool.

L'invention concerne un ensemble d'instruments servant à implanter des vis à os dans une colonne vertébrale humaine, puis à implanter un élément de raccord longitudinal dans les vis à os. L'ensemble selon l'invention comprend une paire d'instruments de guidage allongés pouvant être montés et manipulés indépendamment et formant un guide d'instrument unitaire si nécessaire. Chaque instrument de guidage comprend une structure de fixation permettant un raccord fonctionnel indépendant de l'instrument de guidage à un bras de la vis à os. La fixation vis à os/instrument de guidage comporte une encoche et/ou un renfoncement pour empêcher la séparation de l'élément instrument de guidage d'une vis à os fixée. Un stabilisateur amovible coopérant avec la paire d'instruments de guidage espace lesdits instruments les uns des autres dans l'ensemble lorsque cela est nécessaire. D'autres instruments comprennent un tournevis coopérant pour vis à os sur lequel est fixé un stabilisateur, un instrument de formation/réduction de fermeture, un organe d'entraînement de fermeture et un instrument à couple antagoniste.

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