Flexible connection low-incision pedicle screw

Abstract

The invention discloses a flexible connection low-incision pedicle screw, which comprises a screw rod, wherein a cylinder perpendicular to the screw rod is arranged on the top of the screw rod; a groove is axially arranged on the cylinder; a fixed clamping groove is symmetrically arranged on the back surface of the groove of the cylinder along the central line of the screw rod; a limiting groove is arranged on the groove surface of the fixed clamping groove; a pedicle screw is also provided with a self-locking device which is locked and matched with the fixed clamping groove; the limiting groove is a deepening structure, the longitudinal section is wedge-shaped, and the self-locking device is matched with the limiting groove in a limiting way. The top of the screw rod adopts a groove structure, the groove structure forms a sliding matching hole which is matched with an orthopedic bar in a sliding way, and the whole device is locked and matched through the self-locking device; since theself-locking device adopts a flexible binding belt, the positive pressure of the binding belt on the orthopedic bar is very limited, so the orthopedic rod can slide in the sliding matching hole of the screw to induce the abnormal spinal column to grow in the normal direction, thereby the constraint on the spinal column growth can be avoided.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a device with simple structure, easy operation and flexible connection. [0002] way of low-profile pedicle screws. Background technique [0003] 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-threate...

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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