Anterior cervical plate holder/drill guide and method of use

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/17 (2006.01) A61B 17/70 (2006.01) A61B 17/88 (2006.01) A61B 17/90 (2006.01) A61B 17/80 (2006.01)

Patent

CA 2172369

This invention is a holder drill guide apparatus (150) for holding a spinal plate (20) and for drilling and tapping the bone. The holder drill guide comprises two arms (151, 152) which pivot with respect to each other, and a foot (157) attached at the end of each arm (151, 152). Each foot (157) has a hook (161) which is adapted to securely grasp a spinal plate (20), and each foot (157) has a pair of thru-holes (158). Each thru-hole (158) is aligned with a screw bore (27) in the spinal plate (20) when the holder drill guide (150) is engaged to the plate (20). The system further includes a number of double headed fixation pins (170), which hold the plate (20) in position against the cervical spine during drilling and tapping. In another embodiment a drill and tap guide system (100) can be mounted on a bone plate (20) to provide a firm foundation for accurately drilling and tapping screw holes into vertebra to be instrumented. The drill and tap guide system (100) includes an assembly support (101) which is engaged to the plate (20) by way of positioning screw (105) to the guide body (110). A tap sleeve (102) and drill guide (103) can then be supported by the assembly support (101), which both thereby provide accurate positioning for a drill (104).

L'invention concerne un dispositif (150) constituant un guide de perçage et un support et servant à maintenir une plaque rachidienne (20), ainsi qu'à percer et à tarauder l'os. Ce dispositif comporte deux bras (151, 152) pivotant l'un par rapport à l'autre et un pied (157) fixé à l'extrémité de chaque bras (151, 152). Chaque pied (157) possède un crochet (161) conçu pour saisir fermement une plaque rachidienne (20), ainsi qu'une paire de trous traversants (158). Chaque trou traversant (158) est aligné sur un perçage de vis (27) situé dans la plaque rachidienne (20) quand le dispositif (150) est en contact avec la plaque (20). L'ensemble comprend, de plus, plusieurs chevilles de fixation à tête double (170) maintenant la plaque en place contre le rachis cervical pendant le perçage et le taraudage. Dans un autre mode de réalisation, un système de guidage de perçage et de taraudage (100) peut être monté sur une plaque osseuse (20), de façon à constituer une base solide, afin de percer et de tarauder avec précision les trous de vis dans les vertèbres. Ce système (100) comprend un support de montage (101) accouplé à la plaque (20) au moyen d'une vis de positionnement (105) de l'élément de guidage (110). Un manchon de taraudage (102) et un guide de perçage (103) peuvent ensuite être supportés par le support de montage (101) et permettent de positionner un forêt (104) avec précision.

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