Anterior cervical facet joint twist lock distraction reduction device

Abstract

The invention discloses an anterior cervical facet joint twist lock distraction reduction device. The anterior cervical facet joint twist lock distraction reduction device comprises a restoration assembly and a locking assembly. The restoration assembly comprises handheld parts, the middles of the two handheld parts are hinged, first adjusting cylinders are arranged at the bottom ends of the handheld parts and rotationally connected with the handheld parts, the first adjusting cylinders sleeve the peripheries of the tops of distraction rods, the bottom ends of the distraction rods are fixedlyconnected with intervertebral distraction plates, the bottoms of the distraction rods penetrate through a vertebral body front edge pressing plate, and the distraction rods are in threaded connectionwith the vertebral body front edge pressing plate; and the locking assembly comprises an anterior steel plate and an intervertebral space steel plate, and the anterior steel plate comprises a head steel plate, a telescopic sleeve rod and a tail steel plate which are fixedly connected in sequence in the length direction. The two processes of distraction and lifting a vertebral body are combined inone device, the operation is easy, and meanwhile the anterior fixation is more flexible.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an anterior transcervical facet joint twist lock distraction reset device. Background technique [0002] In clinical work, the locking of cervical facet joints due to trauma is very common, such as figure 1 As shown, the normal facet joint relationship should be as the position indicated by the green arrow, and the facet joint lock is shown as the position indicated by the red arrow. For such patients, if only the facet joints are locked without intervertebral disc damage and nerve compression, the locked facet joints can be reset only from the posterior approach; but in most cases, these patients will Intervertebral disc injury and cervical spinal cord or cervical nerve root compression caused by vertebral body misalignment, and the anterior and middle columns of the cervical spine are often unstable. For such patients, we used to perform combined anterior and posterior surgery i...

AI Technical Summary

Problems solved by technology

[0003] The existing reduction system, no matter it uses the Caspar distractor or other reduction systems, uses vertebral body screws to distract, so the force of distraction is mainly located in the front middle of the vertebral body, not the most important vertebral body. For the posterior part, this method of distraction will often cause the screws to cut the vertebral body, and it cannot be guaranteed to be parallel, so it is not flexible enough to use; at the same time, it is difficult to quantify the height of the distraction during the distraction process, so it is easy to cause damage to the vertebral body due to excessive distraction. Cause soft tissue damage, such as tearing of small veins, etc., causing soft tissue swelling;

[0004] The existing reduction systems all rely on vertebral body screws, so they are all distracted in the middle position, that is to say, the focus of the distraction is on the midline of the upper and lower vertebral bodies, and the degree of distraction is symmetrical. Inability to separate distractions for left, right, or bilateral facet joint locks

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