Pedicle screw

A pedicle screw and screw body technology, applied in the field of pedicle screws, can solve the problems of difficult operation of pedicle screw implantation and reset, inability to fix the direction and angle, and inability to rotate relative to each other, so as to achieve simple structure and avoid Effects of panning and preventing loss of reset

Active Publication Date: 2013-01-02
SHANGHAI SANYOU MEDICAL CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the fixed-angle pedicle screw can reduce the loss of reduction after surgery, during the operation process, because the screw seat and the screw body of the fixed-angle pedicle screw remain fixed, they cannot be rotated relative to each other; when the screw is implanted, The selection of the screw entry point and the preparation of the screw path are very strict; in the operation of rotating rods and bending rods, in order to successfully implant the rods and shape them to the patient's physiological curve, it is often necessary to cooperate with a large number of instruments, resulting in vertebral fractures. Pedicle screw placement and reduction are very difficult
[0010] Because the screw body and the screw seat of the multiaxial pedicle screw can rotate relative to each other in multiple directions, it is more convenient in the process of implantation and reduction; but because the direction and angle cannot be fixed, the screw seat and the screw body are perpendicular to the axis of the spine. It can also be rotated relatively in the same direction, and it is easy to cause loss of reset after surgery

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pedicle screw
  • Pedicle screw
  • Pedicle screw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The core of the present invention is to provide a pedicle screw, which not only has corresponding flexibility during the operation, but also can reduce the loss of reduction after the operation.

[0035] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Please combine image 3 with Figure 4 ,reference figure 2 , figure 2 It is a schematic structural diagram of a specific embodiment of the pedicle screw provided by the present invention, image 3 for figure 2 The structure diagram of the nail body of the pedicle screw shown, Figure 4 for figure 2 The schematic diagram of the structure of the pedicle screw seat shown.

[0037] The pedicle screw provided by the present invention includes a nail body 5 and a nail seat 4.

[0038] The upper part of the nail body 5 has a cylindrical bo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a pedicle screw, which comprises a screw body and a screw seat, wherein the upper part of the screw body is provided with a columnar body; the cross section of the columnar body has a first arc-shaped structure with the radian of more than or equal to 180 degrees; the lower part of the screw seat is provided with a cavity; the cross section of the cavity has a second arc-shaped structure with the radian of more than 180 degrees; the outer peripheral surface of the columnar body is in rotation fit with the inner wall face of the cavity; a threaded area on the lower part of the screw body extends outwards from a lower opening of the cavity; and the diameter of the screw body on the lower opening is smaller than the width of the lower opening. The pedicle screw provided by the invention has corresponding flexibility in a surgery process, and reset loss can be reduced after a surgery.

Description

Technical field [0001] The invention relates to a spinal surgery equipment, in particular to a pedicle screw. Background technique [0002] Surgical treatment of spinal deformity through spinal internal fixation technology has a history of decades; from the adoption of spinal internal fixation technology in my country in the 1980s, from the original Harrington (Harrington rod) technique to the Luque sublaminar in the 1970s Wire fixation, and then to the CD internal fixation system, the spinal internal fixation technology has been greatly improved. In recent years, with the development of spinal biomechanics research and material science, spinal internal fixation technology has been widely used in surgical treatment of spinal degenerative diseases, spinal tumors, trauma and even spinal infections. [0003] The instruments used in spinal fixation technology include pedicle screws and rods. The pedicle screw includes a nail seat and a nail body, the nail body can be implanted in the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): A61B17/70A61B17/86
Inventor邱勇
OwnerSHANGHAI SANYOU MEDICAL CO LTD