Pressurized connection structure for pedicle screws

Abstract

The invention belongs to the field of medical instruments, and specifically relates to a pressurized connection structure for pedicle screws. The structure includes two pedicle screws; each pedicle screw is provided with a U-shaped through groove; the U-shaped through grooves are in threaded connection with jackscrews; the jackscrews press U-shaped connecting blocks into the U-shaped through grooves; the two U-shaped connecting blocks are connected into an integral body through a pressurized straight rod; the pressurized straight rod has a polished rod section and a thread section; the polished rod section passes through one U-shaped connecting block clamped between a flange and a positioning pin; and the thread section is connected to the other U-shaped connecting block. The beneficial effects of the structure are that the distance between two vertebral segments can be visually and accurately opened through thread adjusting, so that operations like bone graft can be realized; one U-shaped connecting block can move to the other U-shaped connecting block by forward rotating the thread section, so that the structure is benefit for the adjacent two vertebral bones to grow and heal into an integral body; and rehabilitation cycles of patients can be greatly shortened through tight pressing, so that good operation treatment effects can be achieved.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a pressure connection structure of a pedicle screw. Background technique [0002] Lumbar disc herniation is one of the more common diseases, mainly because various parts of the lumbar intervertebral disc (nucleus pulposus, annulus fibrosus and cartilage plate), especially the nucleus pulposus, have degenerative changes to varying degrees, and under the action of external forces , the annulus fibrosus of the intervertebral disc ruptures, and the nucleus pulposus tissue protrudes (or protrudes) from the rupture to the rear or in the spinal canal, causing the adjacent spinal nerve roots to be stimulated or compressed, resulting in low back pain, numbness and pain in one or both lower limbs and other clinical symptoms. Lumbar disc herniation has the highest incidence rate in L4-5 and L5-S1, accounting for about 95%. [0003] At present, for more serious cases of lumbar in...

AI Technical Summary

Problems solved by technology

Among them, it is not easy for the doctor to grasp the scale to open the gap at the vacant position of the lumbar intervertebral disc that was originally removed, and the operation is complicated; in addition, after inserting the filler, if the filler is not enough, or if the two adjacent vertebrae are compressed If the joint is not tight, it will be difficult for the bone to grow and heal as a whole, which will affect the patient's recovery cycle, and even require another operation.

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