Folding and unfolding type interbody fusion cage

Abstract

The invention provides a folding and unfolding type interbody fusion cage. The folding and unfolding type interbody fusion cage comprises an upper shell, a lower shell, a plurality of unfolding devices and two folding and unfolding faces. The folding and unfolding faces are connected between the upper shell and the lower shell and located on two sides of the upper shell and two sides of the lowershell respectively. The upper shell, the lower shell and the folding and unfolding faces are matched to form a cavity, and the same ends of the upper shell and the lower shell are matched to form an operation port communicating with the cavity. The upper shell and the lower shell are each provided with an unfolding device. When the folding and unfolding type interbody fusion cage is not unfolded,the folding and unfolding faces are folded and stored in the cavity. According to the folding and unfolding type interbody fusion cage, under the condition that the initial size of the fusion cage isnot increased, an intervertebral space can be implanted into a small incision, then transverse expansion meeting the clinical requirement is performed after the interbody fusion cage reaches a properposition, and the bony fusion area of the interior of the fusion cage and the vertebral body is enlarged.

Description

technical field [0001] The invention relates to the technical field of intervertebral fusion devices, in particular to a foldable and unfoldable intervertebral fusion device. Background technique [0002] Degenerative disc disease, lumbar instability, low back pain caused by spondylolisthesis, and spinal instability caused by a large number of traumas have become one of the important diseases that endanger public health and are the leading cause of spinal disability. The goal of spinal disease treatment It is to relieve low back pain and restore spinal stability. [0003] Spinal fusion is one of the important methods for the treatment of spinal diseases. Surgery is used to treat spinal instability and slippage caused by degenerative changes, trauma, etc., and to rebuild the mechanical stability of the spine by making the local upper and lower segments form bony fusion. sex. In recent years, in order to increase the fusion rate of bone grafts, reduce the dependence on exter...

AI Technical Summary

Problems solved by technology

[0006]Patent No. "201920227546.9" is a patent named "expandable fusion device", which increases the height of the fusion device and increases the bone graft space through the action of the connecting rod ; but it only increases the height, but it cannot increase the contact area between the fusion cage and the vertebral body, and cannot really and effectively improve the fusion rate

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