Spinal intervertebral body fusion device

Abstract

The disclosure relates to a spinal intervertebral body fusion device including an adjustable spacer, a first and second pushing pieces, and an operative piece. The adjustable spacer includes a first and second supporting plate portions. The first supporting plate portion is installed on the second supporting plate portion. The first and second supporting plate portions form a first and second opening. The first pushing piece located at the first opening and is partially clamped by the first and second supporting plate portions. The second pushing piece located at the second opening is partially clamped by the first and second supporting plate portions. The operative piece is movably disposed through the second pushing piece and screwed to the first pushing piece. The operative piece has an annular slot, and the second pushing piece is partially located in the annular slot.

Description

technical field [0001] The invention relates to an implant, in particular to an intervertebral fusion device. Background technique [0002] There are intervertebral spaces between the vertebral bodies of the vertebrae, but they are not directly connected closely, and there is an intervertebral disc in the intervertebral space to absorb and slow down the pressure or impact on the vertebral bodies. For some spine-related conditions such as spondylolisthesis (spondylolisthesis) where the vertebrae are misaligned, herniated intervertebral disc (HIVD) or spinal stenosis (spinal stenosis) that compresses the nerves, it is usually performed by removing all or part of the spine. The intervertebral disc is treated by surgery, and the structure that can support the upper and lower vertebrae is implanted into the intervertebral space after the operation, so as to avoid the adverse consequences such as the collapse of the intervertebral space or the deformation of the spine after the in...

AI Technical Summary

Problems solved by technology

However, the size of the traditional cage is fixed, and doctors cannot change its length, width, height, and the inclination of the outer surface, so there will be some problems in the actual operation

For example, the ideal size of the intervertebral space needs to be judged more accurately by the doctor during the operation. Therefore, the height of the fixed-size cage is often insufficient or too high, or the angle of the inclination does not meet the actual needs, so that the doctor cannot use the cage to adjust the size of the intervertebral space. The vertebral body is pushed to the ideal position and the cage cannot give proper support to the vertebral body, etc.

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