Limiting release-preventing atlanto-odontoid joint connector and mounting method thereof

A connector and atlanto-tooth technology, which is applied in the field of limit-off anti-atlanto-tooth joint connector and its installation, can solve the problems of unstable atlanto-tooth joint connector function and affect practical application, and achieve good application prospects and simple installation Ease of operation and improved reliability

Active Publication Date: 2016-05-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in practical applications, the effect of using the fit between the boss body and the inner concave ring groove to prevent the tripping of the axial and atlas parts is not ideal, and tripping often occurs, resulting in the functional failure of the atlanto-tooth joint connector. Unstable, affecting practical application

Method used

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  • Limiting release-preventing atlanto-odontoid joint connector and mounting method thereof
  • Limiting release-preventing atlanto-odontoid joint connector and mounting method thereof
  • Limiting release-preventing atlanto-odontoid joint connector and mounting method thereof

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Experimental program
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Effect test

Embodiment 1

[0052] In this embodiment, the three-dimensional structure diagram of the position-limiting and anti-disengagement atlanto-tooth joint connector is as follows: figure 1 As shown, it includes the axis component 1 and the atlas component 2.

[0053] Such as figure 2 As shown, the axis component 1 includes an axis connecting base 3 and two connecting plates 4 connected with the axis connecting base 3 . One end of the pivot joint 3 is formed with a protruding rotatable head body 5 , and the end surface of the head body is a spherical surface 6 .

[0054] The center axis of spherical symmetry of the head-body spherical surface 6 is taken as the reference axis, the direction parallel to the reference axis is taken as the axial direction, and the direction perpendicular to and connected with the reference axis is taken as the radial direction. The head body spherical surface 6 is formed with an inner concave ring groove 7 along a direction perpendicular to the axial direction.

...

Embodiment 2

[0072] In this embodiment, the structure of the position-limiting and anti-disengagement atlanto-tooth joint connector is basically the same as that of Embodiment 1, the difference is that the inner concave ring groove is an inner concave arc groove body, that is, each section passing through the reference shaft has the same shape. Indented arc. Correspondingly, each section of the limiting boss 13 passing through the reference axis is also a concave arc surface with the same shape, and after the limiting boss 13 is embedded with the inner concave ring groove 7, there is a tolerance between the two, The position-limiting boss 13 can be rotated left and right and forward and backward relative to the inner concave ring groove 7 . The left and right rotation refers to the reference axis as the axis of rotational symmetry, and the pivot component 1 can rotate left and right relative to the atlas component 2 . The forward and backward rotation refers to that the pivotal component ...

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Abstract

The invention provides a limiting release-preventing atlanto-odontoid joint connector and a mounting method of the limiting release-preventing atlanto-odontoid joint connector. The connector separates an atlas connecting table into an upper part and a lower part, the upper part and the lower part are buckled through an insertion buckling manner by adopting a clamp groove, so as to from a hollow cavity with one end open, a rotatable head body of an axis component is inserted into the hollow cavity and is in movable fit with the hollow cavity, and after the upper part and the lower part are in insertion buckling, a release-preventing baffle is arranged for further insertion buckling closing with the lower part of the atlas connecting table through the clamp groove, so that the release of the upper part and the lower part of the atlas connecting table is prevented. Therefore, the atlanto-odontoid joint connector can well control the vertical buckling limiting and the left-right rotation limiting between the axis component and an atlas component, and is easy and feasible to mount, and the release between the axis component and the atlas component is effectively prevented, thus the reliability of the limiting release-preventing atlanto-odontoid joint connector in practical application is greatly improved, and the limiting release-preventing atlanto-odontoid joint connector has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a position-limiting and anti-loosening atlanto-tooth joint connector and an installation method thereof. Background technique [0002] At present, decompression and fusion are mostly used in the medical treatment of atlantoaxial dislocation and instability. [0003] Simple decompression surgery cannot completely correct the atlantoaxial spine, and may even aggravate the instability of the atlantoaxial joint. Fusion is to stabilize the atlantoaxial joint through the fusion of the atlantoaxial spine, which directly leads to the obvious limitation of the rotational movement of the postoperative (head and neck) atlantoaxial joint of the patient, which will eventually lead to instability and degeneration of the unfused cervical spine. Therefore, decompression surgery and fusion surgery cannot eradicate the dislocation and instability of the atlantoaxial spine, and at the same...

Claims

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Application Information

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IPC IPC(8): A61B17/70A61F2/44
Inventor 王云峰陈希良胡勇
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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