Device used for realizing shoulder joint stability measurement

Abstract

The invention discloses a device used for realizing shoulder joint stability measurement. The device comprises a MTS material testing machine, a humerus shaft fixing mechanism (1), and a shoulder blade fixing mechanism (2); the humerus shaft fixing mechanism (1) is fixedly arranged on a moving head of the MTS material testing machine, is used for realizing adjusting of the rotating angle of humerus shaft, and completing loading of humerus shaft along the vertical direction under the action of the MTS material testing machine; the shoulder blade fixing mechanism (2) is fixedly arranged on a workbench of the MTS material testing machine, and is used for completing accurate adjusting of the position of shoulder blade and adjusting of shoulder joint abduction angle, and achieving test requirements. According to the device, the clamping head is removed using the MTS material testing machine so as to realize quantification loading of humerus shaft, measuring the shifting distance of humerus shaft relative to scapula glenoid, and completing mechanical testing of shoulder joint sample stability.

Description

technical field [0001] The invention relates to an auxiliary device for a stretching experiment, more particularly, a device for measuring the stability of a shoulder joint specimen. The device of the invention is designed on the basis of the existing MTS material testing machine. Background technique [0002] The shoulder joint is the most flexible joint in the human body. It is composed of the humeral head and the glenoid of the scapula. It is a typical ball-and-socket joint. The glenoid is small and shallow, with a labrum attached to the edge to increase the depth of the glenoid; the joint capsule is thin and loose, and the long head tendon of the biceps brachii passes through the capsule; the coracohumeral ligament, coracoacromial ligament and tendons outside the joint capsule strengthen it Stability, only the anterior and inferior part of the joint capsule has no ligament and muscle reinforcement, and is the weakest. Therefore, when the shoulder joint is dislocated, th...

AI Technical Summary

Problems solved by technology

[0004] The structure of the shoulder joint is complex, especially the shape of the scapula is irregular. During the test, the position adjustment requirements are high. The existing mechanical test equipment cannot meet the requirements. There is no professional mass production equipment in the world, and the test equipment used are all developed and customized by the researchers.

At present, the ideal test equipment is the robot / universal load moment sensor test system, developed and applied for some foreign laboratories, but the system is expensive, the software program is complicated, and requires professionals to operate, which is not conducive to popularization

Images