Expandable interbody fusion cage applied to minimally invasive spine surgery

Abstract

An expandable interbody fusion cage applied to a minimally invasive spine surgery comprises a protective frame body, an upper expansion body, a lower expansion body and an adjusting mechanism, whereinthe adjusting mechanism comprises an adjusting screw, an upper supporting seat, a lower supporting seat, two upper adjusting arms and two lower adjusting arms; the upper ends of the two upper adjusting arms are hinged to the upper supporting seat which is connected with the lower end surface of the upper expansion body; the lower ends of the two lower adjusting arms are hinged to the lower supporting seat which is connected with the upper end surface of the lower expansion body; the lower ends of the two upper adjusting arms are separately hinged to the upper ends of the two lower adjusting arms; the adjusting screw penetrates through hinged portions of the upper adjusting arms and the lower adjusting arms; the portion, which is hinged to the corresponding lower adjusting arm, of one of the upper adjusting arms is connected to a fixing end of the protective frame body; and a threaded hole which is connected with the adjusting screw in a matched manner is formed in the fixing end. By changing the position of a sliding nut on the adjusting nut, the distance between the upper expansion body and the lower expansion body is adjustable, the wound is small, the height of intervertebral space is expanded, and thus, the expandable interbody fusion cage is suitable for clinic application of the orthopedics department.

Description

technical field [0001] The invention relates to the technical field of spinal surgery medical instruments, in particular to an intervertebral fusion device, in particular to an expandable intervertebral fusion device used in minimally invasive spinal surgery. Background technique [0002] Lumbar degenerative disease is a common type of disease that causes low back pain and dysfunction. It generally manifests as discogenic low back pain, lumbar facet joint disorder or nerve compression, sometimes accompanied by lumbar spinal stenosis and spondylolisthesis. affect the work and life of patients. At present, the commonly used treatment methods include conservative treatment, minimally invasive surgery and surgical treatment. For patients with spinal degenerative diseases, if intervertebral disc herniation or spinal stenosis is accompanied by spinal instability, conservative treatment is not effective at this time, and surgery is often required. During the operation, not only th...

AI Technical Summary

Problems solved by technology

Generally, a suitable type of expansion fusion cage is selected according to the height of the pretreated intervertebral space of the patient, but it is often not possible to put it into the working sleeve of the spinal endoscope. Postoperative complications such as fusion cage movement

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