Cervical spine fixator and screwdriver used therefor

Abstract

A cervical spine fixator and a screwdriver used therefore is disclosed wherein the fixator comprises plates (12, 212) for being adjoined to a cervical spine fixation region and a plurality of screws (14, 214). The plurality of screws are fixedly inserted into a patient's cervical spine and simultaneously coupled to the plates, wherein an adjacent region coupled with the screws in the plates is fixed with screw head fixture members (16, 216) having a protruder, which is deformed under the effect of pressure by a screw head when the screws are inserted and returns to their position of origin when the screw head is completely accommodated into the plates to be hitched by the screw head. The plates are formed thereon with receiving grooves (22, 222) for accommodating the screw head and the screw head fixture member. The receiving grooves are formed with openings into which the screws are inserted and a recess into which the screw head is received. The screw (214) formed with a groove of concaved curvature is installed or removed by a screwdriver (230) formed with a protruder of convex curvature, such that it is easy to manufacture, and the thickness of the plates is reduced, thus eliminating the feeling of a foreign substance after a surgical operation.

Description

technical field [0001] The present invention generally relates to a cervical spine fixator implanted as an anterior neck for the treatment and correction of cervical intervertebral disc disease, cervical herniated disc disease, cervical spondylotic myelopathy, cervical spondylosis, etc. Fractures, dislocations, tumors and mutations in the back of the neck and other diseases. Background technique [0002] Cervical misalignments are generally treated by maintaining an ideal spatial relationship and orientation of the individual cervical vertebrae relative to each other. A common neck fixation device includes a plate member and a fixation device comprising a plurality of screws fixedly insertable into the plate. [0003] The fixation device comprises fixation screws for pushing or fixing into the upper and lower cervical vertebrae of the cervical spine, whereby the individual vertebrae are fixed or handled by the locking force of the plate elements and the fixation screws. ...

AI Technical Summary

Problems solved by technology

[0011] However, there are still some disadvantages in WO 00 / 78238A1 and EP 1169971A2 in that fixing tools or split rings are accommodated in the holes of the plate elements by elastically deforming the elements under the action of pressure to fix the head of the screw so that the fixing operation process becomes more complicated. more difficult, adding more trouble to manufacturing, and resulting in thicker plate elements

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