Distraction bone grafting device for vertebral compression fractures

A compression fracture, vertebral body technology, applied in the direction of internal bone synthesis, spinal implants, medical science, etc., can solve the problems affecting vertebral body strength, insufficient strength, fractures, etc., to avoid damage to nerves.

Inactive Publication Date: 2014-12-31
THE THIRD XIANGYA HOSPITAL OF CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, the vertebral body is mainly composed of cancellous bone. After the vertebral body is compressed and fractured, the cancellous bone is also squeezed. Therefore, when the vertebral body is stretched to restore the height of the vertebral body, the interior of the vertebral body is often empty. , filled with scar tissue, affecting the strength of the vertebral body
One year later, when the patient took out the screw-rod system, there was a risk of fracture due to insufficient strength

Method used

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  • Distraction bone grafting device for vertebral compression fractures
  • Distraction bone grafting device for vertebral compression fractures
  • Distraction bone grafting device for vertebral compression fractures

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Embodiment Construction

[0023] Combine below figure 1 , figure 2 The vertebral compression fracture distraction bone grafting device of the present invention is introduced in detail, which includes a sleeve 1, an inner core (not shown in the figure) can be arranged in the sleeve, and the inner core can be pulled out from the sleeve. There is a cylinder body 2 movable in the cylinder, which can be pulled out from the sleeve, and the connection method between the sleeve and the cylinder body can adopt the existing method of the sleeve and the inner core, and at the same time, in order to ensure that the cylinder body does not protrude At the inner end, a flange 11 extends inwardly at the inner end of the sleeve, thereby blocking the cylinder in the sleeve; a plunger 3 that can move axially along the cylinder is arranged in the inner cavity of one end of the cylinder, and the plunger Push the two stretching arms 4 arranged in the cylinder to stretch out the other end of the cylinder, and the stretched...

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Abstract

The invention relates to a distraction bone grafting device for vertebral compression fractures. The distraction bone grafting device comprises a sleeve in which an inner core can be arranged, a cylinder is movably arranged in the sleeve, a plunger which can move in the axial direction of the cylinder is arranged in an inner cavity at one end of the cylinder, and pushes two distracting arms arranged in the cylinder to extend out of the other end of the cylinder, the extending end of each of the distracting arms is constrained on the inner wall of the cylinder at the other end, and distracting blocks are fixed on the end faces of the extending ends. According to the invention, the cylinder, the plunger and the distracting arms are matched, when the plunger moves along the cylinder, the distracting arms distract a vertebral body through the distracting blocks, so that anterior longitudinal ligaments, posterior longitudinal ligaments and fibrous rings are not stretched to avoid nerve injuries.

Description

[0001] technical field [0002] The invention relates to a repairing device for vertebral body compression fractures, in particular to a distracting bone grafting device for vertebral body compression fractures. Background technique [0003] At present, the rapid development of transportation and construction has led to an increase in trauma patients while bringing about economic development. Among trauma patients, the incidence of spinal fractures increases year by year, causing a great burden on society and individuals. Spinal fractures are mostly vertebral compression or burst fractures. After the fracture, the height of the vertebral body is lost, and the spine is deformed. Severe cases are often accompanied by spinal cord injury. [0004] At present, there are many ways to treat vertebral fractures: 1. Conservative treatment. For patients with vertebral body compression less than 1 / 3, absolute bed rest for 1.5 months, and get out of bed after the fracture heals; 2. Per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70A61F2/44
CPCA61B17/025A61B17/56A61B2017/0256A61B2017/564
Inventor 吴松王卫国沈民仁
Owner THE THIRD XIANGYA HOSPITAL OF CENT SOUTH UNIV
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