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Dynamic screw

A technology of screws and universal nails, which is applied in the field of medical devices, can solve the problems of long operation time, cumbersome fixation, and tissue damage by burrs, and achieve the effects of short operation time, simple fixation, and convenient adjustment

Inactive Publication Date: 2018-12-18
SUZHOU & SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional nail bar fixation form such as figure 1 As shown, the structure is more complex and the fixation is more cumbersome, resulting in a longer operation time; the fixation rod has a contour and a high notch, which needs to be broken off, which will cause burrs to damage the tissue

Method used

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 2-3 As shown, a Dynamic screw 2 includes a universal nail 21, an outer seat 22, and an intermediate body 23; wherein the universal nail 21 includes a threaded portion 211 and a spherical portion 212; the spherical portion 212 is connected to the end of the threaded portion 211;

[0024] The outer seat 22 includes a crown portion 221, an intermediate body accommodation portion 222, and a plurality of protrusions 223; the accommodation portion 222 is formed inside the crown portion 221, and the end of the crown portion 221 is provided with the plurality of protrusions 223, A plurality of protrusions 223 are respectively provided with hooks 224;

[0025] The intermediate body 23 includes an insertion portion 231, a spherical portion accommodation portion 235 and two clamping portions 232; the clamping portion 232 is connected to the in...

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PUM

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Abstract

The invention relates to a dynamic screw comprising a universal nail, an outer seat and a middle body, wherein a spherical part is connected to an end part of a screw thread part, a middle body accommodating part is formed in a crown-shaped part, an end part of the crown-shaped part is provided with a plurality of protrusions that are respectively provided with hook parts, two clamping parts are connected with an inserting part, a spherical part accommodating part is formed in the inserting part, the two clamping parts form a clamping space for clamping a fixed rod, the middle part is arrangedin the middle body accommodating part of the outer seat, the spherical part of the universal nail is arranged in the spherical part accommodating part of the inserting part, and the spherical part ofthe universal nail can rotate in the spherical part accommodating part so as to adjust a fixing angle of the universal nail. In the dynamic screw disclosed in the invention, the universal nail is adopted for adjusting the fixing angle, and the dynamic screw is zero in torque; simple fixation, convenient adjustment, high efficiency and reduction of operation time can be realized.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a dynamic (Dynamic) screw for fracture surgery. Background technique [0002] The traditional nail bar fixation form such as figure 1 As shown, the structure is more complicated, and the fixation is more cumbersome, resulting in a longer operation time; the fixation rod has a contour and a high notch, which needs to be broken off, which will cause burrs to damage the tissue. Contents of the invention [0003] In view of the above-mentioned defects of the prior art, the object of the present invention is to provide a Dynamic screw with simple structure and convenient and quick disassembly. [0004] The purpose of the present invention is achieved through the following technical solutions: [0005] A Dynamic screw, including a universal nail, an outer seat, and an intermediate body; wherein the universal nail includes a threaded part and a spherical part; the spherical part is co...

Claims

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Application Information

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IPC IPC(8): A61B17/70A61B17/86
CPCA61B17/7001A61B17/7002A61B17/7074A61B17/8605A61B17/8625
Inventor 薛明星施文彬陈虎蔡云娟王琪刘小娜江亚峰
Owner SUZHOU & SCI & TECH DEV
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