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Testing platform for performance of shoulder joint prosthesis

A test platform and technology of shoulder joints, applied in the direction of shoulder joints, prostheses, joint implants, etc., can solve the problems of implant wear, failure, short-term and long-term failure of artificial shoulder joints that cannot be predicted and effectively evaluated, etc. problems, to achieve the effect of simple operation, reduced labor intensity and high degree of automation

Inactive Publication Date: 2021-02-02
余红薇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the artificial shoulder joint is implanted in the body, a new biological friction pair is formed, and it is in a complex human operating environment, and at the same time bears the comprehensive effects of tension, pressure, torsion and interface shear force, as well as fatigue, wear and corrosion. Long-term use is inevitable. can lead to implant wear and tear, or even failure
There are endless types of artificial shoulder joint prostheses on the market today, but the experimental platform for evaluating and testing the performance of artificial shoulder joint prostheses is still blank, and it is impossible to predict and predict the short-term and long-term failure of artificial shoulder joints. effective assessment

Method used

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  • Testing platform for performance of shoulder joint prosthesis
  • Testing platform for performance of shoulder joint prosthesis
  • Testing platform for performance of shoulder joint prosthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A shoulder joint prosthesis performance testing platform, such as figure 1 As shown, the shoulder joint prosthesis performance testing platform includes: a testing platform 1, a humeral head fixing platform 2, an air pump 3, a complete machine support 4, a parallel rotating platform 5, a glenoid socket fixing platform 6, a pressure sensor 7, and a simulation chamber 8 , PLC 9, PC upper computer 10. The humeral head fixing platform, the air pump and the whole machine bracket are fixed on the test platform, the parallel rotating platform is fixed on the whole machine bracket, the glenoid fossa fixing platform is fixed on the moving platform of the parallel rotating platform, the The simulation chamber is located on the upper end of the humeral head fixation platform, and is used to simulate the real human body friction conditions when the shoulder joint prosthesis moves. The pressure sensor is set on the artificial shoulder joint prosthesis to be tested, and is used to co...

Embodiment 2

[0031] A shoulder joint prosthesis performance testing platform, its overall structure is as follows: Figure 4 As shown, the PLC is respectively connected with the PC upper computer, the servo motor M1, the servo motor M2, the servo motor M3, the air cylinder, the air pump, and the pressure sensor. The PLC is electrically connected to the PC host computer to set functional parameters such as test type, number of cycles, applied load, and motion curve; the PLC is electrically connected to the servo motor M1, servo motor M2, and servo motor M3 to drive the corresponding Rotating pairs R11, R21, and P3 operate in parallel to control the rotation and speed of the parallel rotating platform; the PLC is electrically connected to the cylinder and the air pump to control the height position and the applied load of the humeral head fixed platform; the PLC and The pressure sensor is electrically connected and used to feed back the load on the artificial shoulder joint prosthesis to for...

Embodiment 3

[0033] Such as figure 2 As shown, the parallel mechanism of the parallel rotating platform has a total of m=9 motion pairs and n=8 components. According to the degree of freedom (DOF) formula

[0034]

[0035]

[0036] Determine that the degree of freedom (DOF) of the mechanism is F=3, and the three degrees of freedom are respectively rotations along the X axis, the Y axis and the Z axis;

[0037]For a mechanism with a degree of freedom F, preselect F kinematic pairs as driving pairs and stiffen them. If the obtained new mechanism degree of freedom F’=0, then the preselected F kinematic pairs can be driving pairs at the same time. Since the degree of freedom of the mechanism is 3, the revolving pairs R11, R21, and P3 of the three branches are preselected as the driving pair, and they are stiffened to obtain the degree of freedom of the stiffened mechanism F'=0, which meets the existence criterion of the driving pair.

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Abstract

The invention provides a testing platform for performance of a shoulder joint prosthesis. The testing platform comprises a test platform, a humerus head fixing platform, an air pump, a complete machine support, a parallel rotation platform, a glenoid fossa fixing platform, a pressure sensor, a simulation bin, a PLC and a PC upper computer. The platform can effectively evaluate the basic performance of the shoulder joint prosthesis, test the rotation angles of the shoulder joint prosthesis in all directions, can also test the friction characteristics of the shoulder joint prosthesis, is powerful in function, has certain guiding significance for material selection and structural design of the shoulder joint prosthesis, and fills the blank of evaluation of the performance of the shoulder joint prosthesis.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a shoulder joint prosthesis performance testing platform. Background technique [0002] The shoulder joint is the ball-and-socket joint with the largest and most flexible range of motion in the human body. The ball part is composed of the skin bone that is spherical at the proximal end of the skin bone, and the socket part is composed of the depressed joint of the shoulder and foot bones. The three bones constitute the shoulder joint, which is one of the most important friction joints in the upper limbs of the human body. It can do forward flexion, backward extension, adduction, abduction, internal rotation, external rotation and circular rotation. [0003] Artificial shoulder joint replacement can effectively reconstruct the function of diseased joints and other purposes, thereby improving the quality of life of patients, achieving functions such as pain relief, joint stabilizati...

Claims

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Application Information

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IPC IPC(8): A61F2/46A61F2/40
CPCA61F2/40A61F2/4014A61F2/4081A61F2/4657A61F2/468A61F2002/4018A61F2002/4666
Inventor 余红薇
Owner 余红薇
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