CN215018811U

CN215018811U - Universal centrum screw and universal centrum screw nailing system

Info

Publication number: CN215018811U
Application number: CN202120248133.6U
Authority: CN
Inventors: 刘志勇; 周建峰; 黄文迪; 郑加宝
Original assignee: Changzhou Zhongyi Medical Devices Co ltd
Current assignee: Changzhou Zhongyi Medical Devices Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-12-07
Anticipated expiration: 2031-01-28

Abstract

The utility model relates to an universal centrum screw and universal centrum screw system of nailing, including getting nail instrument, main nail, overcoat, connective bar, locking ring and locking bolt, a plurality of open-type grooves have evenly been seted up along its length direction to the overcoat outer wall. The universal vertebral body screw and the universal vertebral body screw nailing system can be matched with a nail taking tool in a plugging mode by designing the open-type groove on the universal vertebral body screw, so that the nailing and the nail taking are facilitated; the main nail is provided with the concave groove, so that the friction force between the main nail and the locking ring can be increased, and the angle of the centrum screw can be fixed more safely and effectively; three sections of threads are designed on the main nail, so that multiple effects are achieved, and the difficulty in the operation of a doctor is effectively reduced.

Description

Universal centrum screw and universal centrum screw nailing system

The technical field is as follows:

the utility model relates to the technical field of medical equipment, especially, relate to an universal centrum screw and universal centrum screw nail feeding system.

Background art:

the existing minimally invasive universal vertebral body screw nailing system generally comprises a screw body and a screw taking tool, wherein the screw taking tool is connected with the screw body in a clamping mode. This connection mode leads to getting the last nail of nail instrument and screw body and getting the nail very inconvenient, has increased the operation degree of difficulty, and simultaneously, the screw body also has certain degree of difficulty when implanting.

The utility model has the following contents:

the utility model aims at the defect of prior art, provide a simple structure, convenient assembling, can reduce the universal centrum screw and the universal centrum screw system of nailing on the nail and getting the nail degree of difficulty, saving operation time.

The utility model discloses a realize through following technical scheme: a universal centrum screw comprises a main screw, an outer sleeve, a connecting rod, a locking ring and a locking bolt, wherein a plurality of open type grooves are uniformly formed in the outer wall of the outer sleeve along the length direction of the outer sleeve.

In order to increase the friction force between the main nail and the locking ring, the head part of the main nail is provided with a plurality of concave grooves matched with the inner wall of the locking ring.

In order to further facilitate nailing and reduce the operation difficulty, the thread of the main nail comprises a taper thread, a straight thread and an increased bottom diameter thread which are sequentially arranged from bottom to top.

In order to facilitate fixing, riveting salient points are arranged on the outer wall of the outer sleeve.

The utility model also provides a system of nailing on universal centrum screw, including getting nail instrument and above-mentioned universal centrum screw, get nail instrument and the connection of universal centrum screw and can drive universal centrum screw and rotate.

The utility model has the advantages that: the universal vertebral body screw and the universal vertebral body screw nailing system can be matched with a nail taking tool in a plugging mode by designing the open-type groove on the universal vertebral body screw, so that the nailing and the nail taking are facilitated; the main nail is provided with the concave groove, so that the friction force between the main nail and the locking ring can be increased, and the angle of the centrum screw can be fixed more safely and effectively; three sections of threads are designed on the main nail, so that multiple effects are achieved, and the difficulty in the operation of a doctor is effectively reduced.

Drawings

Fig. 1 is a schematic perspective view of the universal vertebral body screw according to the present invention;

FIG. 2 is a cross-sectional view of the universal vertebral body screw of the present invention;

FIG. 3 is a schematic structural view of the main nail of the present invention;

fig. 4 is a schematic view of the three-dimensional structure of the universal vertebral body screw nailing system of the present invention.

The specific implementation mode is as follows:

the following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc. refer to directions of the attached drawings only. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention.

As shown in fig. 1 and 2, the universal vertebral body screw comprises a main nail 1, an outer sleeve 2, a connecting rod 3, a locking ring 7 and a locking bolt 4.

The outer sleeve 2 comprises an upper sleeve and a lower sleeve which are flexibly connected, wherein the upper sleeve and the lower sleeve are both provided with an open groove 5, and the open groove 5 extends out of the top end of the upper sleeve or the lower sleeve. In addition, riveting salient points 6 and round holes are arranged on the outer wall of the outer sleeve 2 and are fixed in a mode of tapping the riveting salient points 6.

As shown in the main nail 1 of figure 3, the head of the main nail 1 is provided with a plurality of concave grooves 8 matched with the inner wall of the locking ring 7, so that the friction between the main nail 1 and the locking ring 7 can be increased, and the angle of the centrum screw can be fixed more safely and effectively. In addition, the thread of the main nail 1 has three stages. In the first stage, a taper thread is adopted when the main nail 1 is just screwed in, so that the resistance of the upper nail in the operation is reduced; in the second stage, a straight thread form is adopted, so that the nail feeding difficulty during the operation of a doctor is reduced, and the nail feeding difficulty is saved; in the third stage, a thread form of gently increasing the bottom diameter is adopted, the extraction force and the screw-out torque of the vertebral body screw after being implanted into a human body are increased, and the vertebral body screw is prevented from loosening. The three stages are designed according to different stage purposes, so that multiple effects are achieved, and the difficulty in the operation of a doctor is effectively reduced.

During assembly, after the main nail 1 and the locking ring 7 are sequentially arranged in the outer sleeve 2, the riveting salient point 6 is tapped, so that the locking ring 7 and the main nail 1 cannot be withdrawn, and finally the locking bolt 4 is arranged to assemble the universal centrum screw.

The universal centrum screw is used with the connecting rod 3 after being assembled completely. After the angle of the universal centrum screw is set, when the locking bolt 4 in the universal centrum screw is screwed up, the connecting rod 3 is extruded downwards under the pressure, the friction force of the locking ring 7 and the main nail 1 is increased, the angle of the main nail 1 is fixed, and final fixation is formed.

When in use, as shown in figure 4, the screw taking tool 9 is inserted into the open groove 5 of the outer sleeve 2, and the universal vertebral body screw can be driven to rotate.

The utility model is suitable for a posterior internal fixation system for orthopedics thoracolumbar fracture, dislocation, slippage and orthopedics.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a universal centrum screw, includes main nail, overcoat, connective bar, locking ring and locking bolt, its characterized in that: the outer wall of the outer sleeve is evenly provided with a plurality of open type grooves along the length direction.

2. The gimbaled vertebral screw of claim 1, wherein: the main nail head part is provided with a plurality of concave grooves matched with the inner wall of the locking ring.

3. The gimbaled vertebral screw of claim 1, wherein: the screw thread of main nail includes from supreme tapering screw thread, the straight screw thread that sets gradually, increase end footpath screw thread down.

4. The gimbaled vertebral screw of claim 1, wherein: riveting salient points are arranged on the outer wall of the outer sleeve.

5. The utility model provides a universal centrum screw system of nailing which characterized in that: comprises a nail taking tool and the universal centrum screw according to any one of claims 1-4, wherein the nail taking tool is coupled with the universal centrum screw and can drive the universal centrum screw to rotate.