Slidable and self-locking atlantoaxial interbody fusion cage

Abstract

The invention provides a slidable and self-locking atlantoaxial interbody fusion cage. The slidable and self-locking atlantoaxial interbody fusion cage comprises an upper sliding piece component, a lower sliding piece component and a wedge-shaped supporting block for supporting the upper sliding piece component and the lower sliding piece component, wherein the upper sliding piece component and the lower sliding piece component are connected in a sliding manner; and the wedge-shaped supporting block is arranged between the upper sliding piece component and the lower sliding piece component. According to the atlantoaxial interbody fusion cage, the defects of a traditional atlantoaxial interbody fusion cage are overcome, and an surgical approach and clinical operation are fully taken into consideration; and the fusion cage is composed of two prosthesis bodies capable of sliding relatively and the wedge-shaped supporting block is arranged, so the fusion cage can conveniently support the atlantoaxial joint, and locking can be conducted so as to ensure the stability of the atlantoaxial joint.

Description

technical field [0001] The invention belongs to the technical field of medical prosthesis manufacturing, in particular to a slidable and self-locking atlantoaxial intervertebral fusion device. Background technique [0002] The atlantoaxial spine is located in the transitional part of the craniocervical region. It has a deep position, complex anatomy, and important functions. Its structural stability mainly depends on the integrity of its own bony structure and the continuity of ligament structures such as the transverse ligament and wing-like ligament behind the odontoid process. The surgical treatment of atlantoaxial dislocation is complicated and difficult, and has always been one of the difficulties in spinal surgery. Atlantoaxial dislocation or instability is common in clinical practice and has many causes, including trauma, inflammation, congenital deformity, degeneration, tumor, and iatrogenic factors, etc., requiring timely surgery to release the compression of the sp...

AI Technical Summary

Problems solved by technology

Although the implantation of iliac crest granules does not affect the subsequent atlantoaxial reduction under the pressure of screw rods, there are still some disadvantages: (1) patients often need to take autologous ilium, which increases the surgical incision and causes greater trauma; ( 2) After implantation of iliac bone grains, it can only promote local bone fusion, and it is difficult to achieve supporting functions, etc.

In order to solve the above disadvantages, many scholars have devoted themselves to the development of atlantoaxial intervertebral fusion devices, but at present, all prostheses have the disadvantage of affecting the further reduction operation of the atlantoaxial vertebrae after implantation, so they have not been promoted clinically.

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