Vertebral plate reinforcing device

Abstract

The invention discloses a vertebral plate reinforcing device used for being matched with an axis arch screw or inferior cervical vertebrae lateral mass screw for use. The vertebral plate reinforcing device comprises a coupling nut, a jackscrew component, a universal arm and arm locking screws, wherein the coupling nut is used for being combined with a screw base, a longitudinal rod is arranged between the coupling nut and the screw base, the jackscrew component is located above the coupling nut, and the jackscrew component and the coupling nut are movably arranged; the universal arm is provided with a near arm end, a far arm end and an arm connecting portion, a long kidney-shaped hole is formed in the near arm end and formed in the mode of surrounding the outer side of the rod portion of the jackscrew component, two arm locking holes are formed in the far arm end, and the arm locking screws are matched with the arm locking holes so as to fixedly connect the universal arm and a cervical vertebral plate. The vertebral plate reinforcing device has the advantage that the four components are linked to axis (or inferior cervical vertebrae) pedicle screw (or lateral mass screw) screws, and the axis (or inferior cervical vertebrae) pedicle screw (or lateral mass screw) has higher pullout force.

Description

technical field [0001] The invention relates to internal fixation in spinal surgery, in particular to a lamina reinforcement device used for coordinating with axial vertebral arch screws or lower cervical vertebral lateral mass screws. Background technique [0002] There are 7 cervical vertebrae, the first cervical vertebra is also called the atlas, the second cervical vertebra is also called the axis vertebra, and the seventh cervical vertebra is also called the long vertebra. The first and second cervical vertebrae are collectively called the upper cervical vertebrae, and the third to seventh cervical vertebrae are collectively known as the lower cervical vertebrae. Posterior cervical screw-rod internal fixation can achieve atlantoaxial reduction through instrumental reduction during surgery, and screw-rod fixation has good biomechanical stability, so it is widely used in spinal surgery. The instrumental reduction mentioned above refers to partial reduction of the atlanto...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of insufficient axial screw pull-out force during the reduction in the existing atlantoaxial screw-rod system; it can also be used to overcome the problem of decreased pull-out force of cervical screws caused by osteoporosis or failure of the first screw placement ( Including axis, lower cervical spine)

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