Spinal column vertebral plate open-door fixing system

Abstract

The invention discloses a spinal column vertebral plate open-door fixing system. The spinal column vertebral plate open-door fixing system comprises a fixing plate body, a development needle, a short bone nail and a long bone nail, wherein the fixing plate body is a Z-shaped structure integrally and comprises an upper body fixing end and a lower body fixing end, the upper body fixing end is provided with an upper body fixing end vertical through hole, the lower body fixing end is provided with a lower body fixing end transverse through hole, a hollow sinking bone grafting groove is between the upper body fixing end and the lower body fixing end, the development needle is inserted into the hollow sinking bone grafting groove of the fixing plate body, and the short bone nail and the long bone nail are respectively provided with a short bone nail thread starting point self-tapping cutting edge and a long bone nail thread starting point self-tapping cutting edge. The system is convenient and simple for bone grafting, is simple to operate and is practical, reliable, safe and effective, spinal canal expansion can be instantly realized during operation to protect the back structure, and door re-closing after single open-door spinal canal expansion laminoplasty is prevented. A polyether ether ketone material is selected, so excellent biological compatibility, small side effect and good long-term effect are realized.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a door-opening and fixing system for spinal lamina. Background technique [0002] Due to various factors such as developmental spinal stenosis, cervical spondylosis, cervical intervertebral disc herniation, posterior longitudinal ligament osteoarthritis, and hypertrophy of the ligamentum flavum, etc., the human spinal canal often causes spinal canal stenosis, compresses the spinal cord and causes axial pain, pain and numbness of the limbs Symptoms such as muscle weakness and even paralysis seriously affect people's daily life. For the above-mentioned diseases, the use of laminoplasty is an effective method for expanding the spinal canal. Among them, single-door laminoplasty is currently the most common laminoplasty. At present, the open-door laminoplasty system has been widely used in the reconstruction of the lamina in open-door laminoplasty. It can expand the spinal ca...

AI Technical Summary

Problems solved by technology

Most of them only consider that the connecting plate fixes the side of the lamina and the side of the lateral mass after the opening of the lamina to realize the expansion of the spinal canal, but it is not enough to complete the real reconstruction of the lamina. Permanent gap, no autogenous bone ingrowth connection, only internal fixation for connection, there is a risk of loosening

Moreover, in the selection of materials for the existing fixation systems, all of them are medical titanium alloys, which have defects such as stress shielding after implantation in the human body, and artifacts during CT and MR examinations that affect clinical observation.

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