Unlock instant, AI-driven research and patent intelligence for your innovation.

Spinal internal fixation nail rod locking mechanism

A technology of locking mechanism and fixing nails, which is applied in the field of medical devices, can solve problems such as thread damage of jackscrews and pedicle screws, uncontrollable application direction, and failure of implants, so that it is not easy to dislocate and move, and avoid wire bursting , the effect of structural stability

Pending Publication Date: 2018-06-29
CHANGZHOU ORTHMED MEDICAL INSTR
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most common problem in the existing fixators is that the frictional force between the pedicle screw and the connecting rod is relatively small, so that the direction of force application is uncontrollable. Cause the top wire and pedicle screw thread to be damaged, that is, the wire burst, thus causing the failure of the implant

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
  • Spinal internal fixation nail rod locking mechanism
  • Spinal internal fixation nail rod locking mechanism
  • Spinal internal fixation nail rod locking mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as Figure 1-3 As shown, it is the spinal internal fixation system of the present embodiment, which includes a pedicle screw 1, a connecting rod 2, a pressing block 3 and a top wire 4, one end of the pedicle screw 1 has a nail base 11, and the pedicle screw 1 The other end has a decompression surface 6 extending along the extension direction of the pedicle screw 1 .

[0021] There is a groove on the nail seat 11, the connecting rod 2 passes through the groove, the connecting rod 2 is a columnar circular rod, and the bottom of the groove is in the shape of an arc that fits the outer wall of the connecting rod 2, that is, the connection Stick 2 fits into the bottom of the groove. The briquetting block 3 is accommodated in the groove, and the briquetting block 3 is arranged above the connecting rod 2. The briquetting block 3 makes the connecting rod 2 fit tightly with the groove, and the briquetting block 3 fits the connecting rod 2 The surface is the pressing surfa...

Embodiment 2

[0025] Such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the pressing surface 31 is a trapezoidal surface.

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 belongs to the technical field of medical instruments, and particularly relates to a spinal internal fixing system. The system comprises a pedicle screw, a connecting bar, a pressing block and a fastening screw; the pedicle screw is provided with a screw seat, a groove is formed in the screw seat, the connecting bar penetrates through the groove, the pressing block is accommodated inthe groove, the connecting bar is pressed tightly and fits the groove, the connecting bar is a circular bar, the surface, fitting the connecting bar, of the pressing block is a tightly pressing surface, the tightly pressing surface is a V-shaped surface or a trapezoidal surface, the fastening screw is accommodated in the groove, and the pressing block is tightly pressed and fits the connecting bar. According to the system, the structure is stabler by adding the pressing block to the system.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a locking mechanism of a nail rod for internal fixation of the spinal column. Background technique [0002] At present, for vertebral instability after spinal trauma, spondylolisthesis, degenerative diseases and other single or multiple fractures, spinal immobilizers are often used for fixation. There are many types of fixators on the market, but most of them are composed of pedicle screws, pedicle universal screws, connecting rods and other corresponding components. The most common problem in the existing fixators is that the frictional force between the pedicle screw and the connecting rod is relatively small, so that the direction of force application is uncontrollable. The top wire and pedicle screw threads are damaged, that is, the wire bursts, thereby causing the failure of the implant. Contents of the invention [0003] The object of the present inv...

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
IPC IPC(8): A61B17/70
CPCA61B17/7032A61B17/7035
Inventor 陈长胜杨杰
Owner CHANGZHOU ORTHMED MEDICAL INSTR