Vertebral plate reinforcing device

Abstract

The invention discloses a lamina reinforcement device, which is used to cooperate with the use of axial vertebral arch screws or lower cervical lateral mass screws. There is a vertical rod between the seats; a top screw part, which is located above the coupling nut, and the top screw part is movable with the coupling nut; a universal arm, which has an arm proximal part, an arm distal part and an arm The connection part has a long waist-shaped hole on the proximal end of the arm, and the long waist-shaped hole is arranged around the outside of the jacking screw part, and there are two arm locking holes on the distal end of the arm and, an arm locking nail, which cooperates with the arm locking hole to fix the universal arm to the cervical lamina. The advantages of the present invention are: through the connection of the above four parts with the axial (or lower cervical) pedicle screw (or lateral mass screw) screw, the axial (or lower cervical) pedicle screw (or lateral mass screw) Has stronger pull-out 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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