Improved distractor for lumbar insertion instrument

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/34 (2006.01)

Patent

CA 2581825

An instrument and method are disclosed for inserting an artificial intervertebral disc implant having upper and lower parts and a pivot element therebetween into an intervertebral space. The instrument has a mounting structure, and an elongated upper arm and elongated lower arms, the arms being pivotally attached to the mounting structure. A distractor separates the upper and lower arms, and hence the upper and lower parts, when moving along the arms so as to permit insertion of the pivot element. The distractor includes a fork arm that extends beyond a main body thereof to engage and support with heads thereof a facing surface of the upper and/or lower part during and following separation of the parts.

La présente invention concerne un instrument et un procédé permettant d'insérer un implant de disque intervertébral artificiel possédant des parties supérieure est inférieure et un élément pivot entre ces parties dans un espace intervertébral. Cet instrument possède une structure de montage et un bras supérieur effilé et des bras inférieurs effilés, ces bras étant fixés de manière pivotante à la structure de montage. Un distracteur sépare les bras supérieur et inférieurs et, par conséquent les parties supérieure et inférieure, lorsqu'il se déplace le long de ces bras de façon à permettre l'insertion de l'élément pivot. Ce distracteur comprend un bras en fourche qui s'étend au-delà d'un corps principal de celui-ci de façon à entrer en contact et supporter avec des têtes de celui-ci une surface de la partie supérieure et/ou inférieure pendant la séparation de ces parties et à la suite de cette séparation.

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