Loading device for intervertebral disc mechanics performance test

Abstract

The invention relates to a loading device for an intervertebral disc mechanics performance test. The loading device is composed of an upper loading head, an angle adjusting sliding block, an observing chamber, a high-speed camera, a lower loading head, a cone and a fixed jaw, wherein guide blocks are arranged at the upper loading head; the angle adjusting sliding block comprises a middle half cylinder, a front adjusting plate and a rear baffle plate, and circular arc guide grooves are respectively arranged on the front adjusting plate and the rear baffle plate and are in sliding fit with the front and rear guide blocks of the upper loading head; the high-speed camera is positioned in the observing chamber; the fixed jaw adopts a three-jaw structure, and a worm wheel is arranged at the fixed jaw and is matched with a worm to form a speed reducing mechanism to drive the fixed jaw to rotate; the cone is fixedly arranged in the three jaw on the fixed jaw; and an intervertebral disc is arranged on the cone and is contacted with the lower surface of the toughened glass of the lower loading head. The loading device has the advantages of simple structure and easiness in operation, can provide axial compression, contortion and lateral bending loading, has a better variable regulating function, can be used for engineered tissue culture and performance test of different segments of intervertebral discs of cervical or lumbar spines, and has a larger economic practicality.

Description

technical field [0001] The invention relates to the fields of cell culture and tissue engineering, in particular to a loading device for testing the mechanical properties of an intervertebral disc. Background technique [0002] With the development of computer technology, modern optoelectronic technology and digital image processing level, the digital image correlation method has increasingly become an important test method in the field of experimental mechanics. The present invention provides a new method for testing the mechanical performance of the intervertebral disc by adopting a digital image correlation method in order to improve and overcome the problems that obviously exist in the existing research on the mechanical testing of the intervertebral disc and cannot be fully and reasonably solved. Including blocking the glass on the observation surface to avoid the influence of boundary effects, embedding dark nano-particles on the surface of the intervertebral disc to o...

AI Technical Summary

Problems solved by technology

So far, no loading system has been reported that can simulate the complex mechanical environment of the intervertebral disc, and at the same time observe the mechanical state of the intervertebral disc under mechanical loads such as side bending and torsion, and collect images to determine the strain field distribution of the intervertebral disc , explore the mechanical state of the intervertebral disc, and provide basic data for scientific analysis of large-scale software

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