Lamina terminalis bone block leverage repositor for thoracolumbar fracture reduction and bone grafting

Abstract

The invention discloses a lamina terminalis bone block leverage repositor for thoracolumbar fracture reduction and bone grafting. The repositor comprises a repositor body and levering functional heads, the repositor body comprises a body handle, a vertebral arch base operation rod is arranged on one end of the body handle, a telescopic adjusting nut is arranged on the body handle, a telescopic adjusting rod is arranged in a telescopic adjusting rod through hole, one end of the telescopic adjusting rod penetrates through a threaded hole of the telescopic adjusting nut, and the other end of thetelescopic adjusting rod penetrates out of the end part of the vertebral arch base operation rod, and the telescopic adjusting rod is provided with a conical expanding functional head connecting end;the levering functional heads comprise front ends, connecting ends and levering plates, and the front ends and the connecting ends are movably connected with the levering plates through hinges; the functional head connecting end is located in dovetail groove of the connecting end. On one hand, the lamina terminalis leverage repositor can be repeatedly used to reduce surgery cost, and on the otherhand, thoracolumbar height restoration can be conducted by targetedly selecting different levering functional heads to further improve the surgical effect.

Description

technical field [0001] The invention relates to a device for orthopedic surgery, more specifically, an endplate bone block prying resetter for thoracolumbar fracture reduction and bone grafting used in orthopedic surgery, which belongs to the technical field of medical devices. Background technique [0002] Thoracolumbar fractures are the most common injuries to the spine. The purpose of treatment is to restore and maintain the normal sequence of the spine, rebuild the stability of the spine, and prevent kyphosis, instability, deformity, and paralysis. The final sequence and function recovery, It depends on the restoration of vertebral body height and the quality of fracture healing. To achieve the above goals, the reduction of vertebral body endplate and fracture fragments is the key. At present, clinically, anterior and posterior secondary operations are often used to fundamentally solve this similar problem. However, secondary operations, especially anterior operations, a...

AI Technical Summary

Problems solved by technology

[0003] The posterior bone grafting technique for thoracolumbar vertebral fractures mostly adopts the working channel through the pedicle. Since there is no specially designed vertebral fracture prying, expansion and reduction device, a small stent with a diameter of 5-7 mm is often used. And similar alternative instruments enter the vertebral body fracture area through the pedicle, and pry the bone fragments at the fracture to the upper, lower sides, and peripheral directions. It has no expansion function and it is difficult to grasp and control the depth because of the lack of scale. Its edge is sharp and easy to damage the wall of the vertebral arch and the peripheral bone tissue of the vertebral body, especially the ventral structure of the anterior edge. It is easy to cause spinal nerve roots, dural sac, spinal cord, Injury to thoracoabdominal viscera and large blood vessels poses serious surgical safety hazards; (2) Due to the small area of ​​the head of prying tools such as small brackets, the rotation and expansion angles are limited and other factors, for vertebral body Lateral, mid-anterior fracture fragments and collapsed endplates cannot be touched effectively, so it is difficult to achieve the purpose of prying and pulling reduction; (3) because it is difficult to achieve overall reduction, it is often necessary to use bilateral pedicle prying and pulling reduction, It is difficult to achieve the purpose of overall reduction, and the injury is aggravated, which prolongs the unnecessary operation time

But on the one hand, because the balloon of the balloon dilatation technique is for one-time use, it has the disadvantage of high operation cost; on the other hand, the balloon dilation is a three-dimensional expansion. Expansion and recovery height are not highly targeted, so the surgical effect needs to be improved

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