A low-profile pedicle screw with flexible connection

Abstract

The present invention disclosed a low -cut vertebral bow root screw that adopts flexible connection, including screws, which are perpendicular to the screw setting of the cylindrical and cylindrical axis.Symptom settings are set with a fixed card slot, and the fixed card slot surface is set to set the limited slot; the vertebral bow root screw is also equipped with a self -locking device, and the self -locking device is lock -up with the fixed card slot;Wedding, the self -locking device is matched with the limit slot.The top of the invention screw adopts the form of a groove structure. The groove structure forms a sliding coordination hole, which is matched with the orthopedic stick sliding.The positive pressure is very limited. Therefore, the orthopedic rod can slide in the pores in the sliding of the screw, inducing the deformity spine to grow in the normal direction, avoiding the constraints of spine growth.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and in particular relates to a low-notch pedicle screw with a simple structure, easy operation and flexible connection. Background technique [0002] Spinal deformity refers to the deviation of one or several segments of the spine from the midline of the spine, usually accompanied by rotation of the vertebral bodies and increased or decreased kyphosis or protrusion on the sagittal plane. It is a three-dimensional spinal deformity with an incidence of about 0.5-2% in adolescents and can be caused by various diseases. When the angle of scoliosis is too large, or shows a clear trend of progress, surgical treatment needs to be considered; otherwise, it will gradually develop into a severe and rigid spinal deformity, which will seriously affect the heart and respiratory function of the child, and affect the spinal cord function leading to paralysis. Even life-threatening. The main purpos...

AI Technical Summary

Problems solved by technology

The existing screw-rod connection is a locked connection, which still has an adverse effect on the growth of the spine and spinal cord function: During the intermission period of the extended operation, the existing orthopedic system requires a locked connection, which still restrains and fixes the spine, limiting the ability of young children or children. The free growth of the spine; during the lengthening operation, it is necessary to loosen the adjustment device to extend the overall rod length with the technique of spreading; such an operation leads to stretching of the spinal cord, which will inevitably pose a threat to the function of the spinal cord

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