posterior atlanto-tooth joint

Abstract

The invention discloses a rear artificial atlanto-tooth joint, which comprises an atlas part, an axis part and a joint part. There are arc-shaped grooves on the body; the pivot vertebrae parts include bone connectors, which are connected by two straight rods and form a "V" shape; the joint parts include joint rods and rolling bodies, so The lower end of the joint rod is connected to the rolling body, and the upper end is connected to the intersection of the two straight rods. The rolling body is arranged in the groove and can be driven by the joint rod to tilt and rotate in each direction; the structure of the present invention is simple and can be used from The bionics of the normal human atlanto-tooth joint is carried out in terms of morphology and mechanics, so as to ensure the normal movement between the atlanto-axial vertebrae.

Description

technical field [0001] The invention relates to a medical prosthesis, in particular to a rear artificial atlanto-tooth joint. Background technique [0002] The atlantoaxial joints of the human body include three independent joints, namely, two atlantoaxial lateral joints formed by the inferior articular process of the atlas and the superior articular process of the axis; The atlantoaxial median joint formed between the transverse ligament of the atlas is also known as the atlantodental joint. The lateral atlantoaxial joint is planar, and the atlantodental joint is axle-shaped. The combination of the two can make the head and the atlas rotate around the odontoid process, while allowing a small amount of flexion and extension and lateral flexion. [0003] At present, atlantoaxial instability and upper cervical spinal cord compression caused by various reasons require surgery to relieve nerve compression. Anterior odontoid excision and decompression are ideal surgical methods,...

AI Technical Summary

Problems solved by technology

In response to this problem, in recent years, cervical spine surgeons have begun to seek a spinal non-fusion technique that can preserve part or all of the atlas intervertebral movement to replace the traditional fusion technique; if the atlanto-tooth joint in front of the human body is replaced, the oral approach must be used, and the other There are problems such as difficult perioperative management, difficulty in operative field preservation, narrow operation space during operation, and high risk of postoperative infection; It can effectively avoid the problems caused by the anterior surgery, but there is no successful design of the rear artificial atlanto-tooth joint that fully meets the physiological functions of the human body at home and abroad.

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