Atlas anterior arch ledger plate

Abstract

An arcus anterior atlantis back plate includes a plate body (1), a bolt fixing hole (10) arranged on the plate body (1), characterized in that, the plate surface of the plate body (1) has a butterfly shape of two wide ends and narrow middle, which matches with the physiology shape of the atlas bone (3). Four fixing holes (10) are arranged on the broadside (11) of the plate body (1), which is arranged with two on one side, and the central connecting line of each two fixing holes (10) has an angle with the horizontal center line of the plate body (1). The advantage of the invention are: the plate surface of the plate body (1) is designed into the butterfly shape of two wide ends and narrow middle matching with the physiology shape of the atlas bone, which makes the activity of the head neck for the patients not confined markedly after the surgery, especially advances the rotating effect of the neck part distinctly, and effectively reduces the pain and inconvenience of the patients; moreover, the central connecting line of the two fixing holes have a certain angle with the horizontal center line of the plate body (1), so the direction for the bolt nailing into the bone on the atlantoaxial fixing plate is different, thereby the plate body generates the whole angular effect and adds the fixing strength of the plate body.

Description

technical field [0001] The invention relates to a medical device, in particular to an atlas anterior arch fixation plate. Background technique [0002] Atlas burst fractures (Jefferson fractures) account for 2% of all cervical spine injuries and are often combined with axial fractures, especially odontoid fractures. Unstable atlas burst fractures are distinguished from stable atlas fractures by the combination of transverse ligament injury. The treatment of atlas fractures remains controversial. Conservative treatment is mainly cranial traction, Halo frame or plaster fixation of the head, neck and chest, and surgical treatment is mainly cervical fixation fusion or occiput to neck fixation fusion. Although fusion can stabilize the atlanto-occipital joint or the atlanto-occipital joint, it is at the expense of the rotation function of the atlanto-occipital joint or the atlanto-occipital joint, which leads to the obvious limitation of the postoperative head and neck movement,...

AI Technical Summary

Problems solved by technology

But its disadvantages are the same as above, that is, at the cost of sacrificing the rotation function of the atlanto-occipital joint or atlanto-occipital joint, resulting in the obvious restriction of postoperative head and neck movement, especially the rotation movement of the patient, which in turn leads to instability and degeneration of the unfused cervical spine , and because the screw holes on the atlantoaxial fixation plate are located on the same straight line up and down, the overall angle effect cannot be produced, which makes the cervical vertebrae easy to break and reduces the fixation fastness of the fixation plate, so its structure still needs to be improved

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