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Artificial ligament in-vitro simulation fatigue simulation and online mechanical monitoring synchronous test device and method

An artificial ligament, synchronous testing technology, used in measuring devices, testing material strength using repetitive force/pulse force, scientific instruments, etc.

Active Publication Date: 2020-06-09
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of establishing as much as possible an artificial ligament stress environment in the joint cavity in vitro under more simulated conditions, and simultaneously monitor and acquire the mechanical data of the artificial ligament under multiple complex loads in real time. question

Method used

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  • Artificial ligament in-vitro simulation fatigue simulation and online mechanical monitoring synchronous test device and method
  • Artificial ligament in-vitro simulation fatigue simulation and online mechanical monitoring synchronous test device and method
  • Artificial ligament in-vitro simulation fatigue simulation and online mechanical monitoring synchronous test device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This example records a fatigue simulation test method for artificial ligament in vitro simulation. The specific test steps are as follows:

[0044] (1) Prepare experimental materials: prepare a force sensor 31 with a measuring range of 500N, a torsion gear 63 with a radius of 25mm, a turntable 66 with a radius of 30mm, a connecting rod 68 with a length of 80mm, and a rack 69 with a length of 80mm. Prepare the artificial ligament sample A1, the length L1 is 30 mm, the diameter D1 is 5 mm, without coating;

[0045] (2) Check parts and install samples: the tensile fatigue testing device assembly 4 is connected and fixed with the fabric strength meter 2 through threads, and the upper clamping device 41 clamps the upper end of the artificial ligament sample A1; the torsional fatigue testing device assembly 6 is The connecting base 65 of the fabric strength meter is connected and fixed to the fabric strength meter 2 through the leading pin, and the rack 69 is adjusted to the ...

Embodiment 2

[0052] This example records a fatigue simulation test method for artificial ligament in vitro simulation. The specific test steps are as follows:

[0053] (1) Prepare experimental materials: prepare a mechanical sensor 31 with a measuring range of 500N, prepare a torsion gear 63 with a radius of 30mm, prepare a turntable 66 with a radius of 40mm, prepare a connecting rod 68 with a length of 75mm, and prepare a rack 69 with a length of 85mm. Prepare the artificial ligament sample A2, the length L2 is 30 mm, the diameter D2 is 5.5 mm, without coating;

[0054] (2) Check the parts and install the sample: the tensile fatigue testing device assembly 4 is connected and fixed with the fabric strength meter 2 through threads, and the upper clamping device 41 clamps the upper end of the artificial ligament sample A2; the torsional fatigue testing device assembly 6 is The connecting base 65 of the fabric strength meter is connected and fixed with the fabric strength meter 2 through the ...

Embodiment 3

[0061] This example records a fatigue simulation test method for artificial ligament in vitro simulation. The specific test steps are as follows:

[0062] (1) Prepare experimental materials: prepare a force sensor 31 with a measuring range of 500N, a torsion gear 63 with a radius of 30mm, a turntable 66 with a radius of 45mm, a connecting rod 68 with a length of 80mm, and a rack 69 with a length of 80mm. Prepare the artificial ligament sample A3, the length L3 is 40mm, the diameter D3 is 5.5mm, without coating;

[0063] (2) Check parts and install the sample: the tensile fatigue testing device assembly 4 is connected and fixed with the fabric strength meter 2 by threads, and the upper clamping device 41 clamps the upper end of the artificial ligament sample A3; the torsional fatigue testing device assembly 6 is The connecting base 65 of the fabric strength meter is connected and fixed to the fabric strength meter 2 through the leading pin, and the rack 69 is adjusted to the ce...

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Abstract

The invention relates to an artificial ligament in-vitro simulation fatigue simulation and online mechanical monitoring synchronous test device and test method, and belongs to the technical field of biomedical textile fatigue performance test devices. The test device comprises a computer, a fabric strength instrument, an online mechanical monitoring assembly, a tensile fatigue testing device assembly, a buckling fatigue testing device assembly and a torsional fatigue testing device assembly. According to the invention, the stress environment of stretching, buckling and twisting multiple loadsof a human autologous anterior cruciate ligament is simulated in vitro; the fatigue resistance of the artificial ligament in the conditions of different constant-force tensile loads, buckling angles and torsion angles is investigated, a relatively simulated test method is provided for the in-vitro fatigue simulation test of the artificial ligament, and meanwhile, the stress condition of the artificial ligament is monitored and acquired in real time to predict the service life of the artificial ligament such that a certain theoretical reference basis is provided for the research and developmentof the artificial ligament.

Description

technical field [0001] The invention relates to an artificial ligament in vitro simulation fatigue simulation and online mechanical monitoring synchronous testing device and testing method, belonging to the technical field of biomedical textile fatigue performance testing devices. Background technique [0002] The anterior cruciate ligament is the main stabilizing structure that controls knee motion and is the most vulnerable of the knee ligaments. Approximately 200,000 ACL injuries are reported each year in the United States. The anterior cruciate ligament tissue lacks blood nutrient supply, and endogenous healing is difficult to occur, so surgery is mostly used for reconstruction treatment. At present, autografts are mainly used for ACL replacement and reconstruction at home and abroad, but there are a series of unavoidable defects such as limited sources and donor site damage. Compared with artificial ligament materials, the sources are more extensive, autologous tissue...

Claims

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Application Information

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IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/0007G01N2203/0026G01N2203/0067G01N2203/0073
Inventor 林婧卢俊王璐管晓宁饶秉钧王富军劳继红赵金忠朱同贺蒋佳燕晓宇
Owner DONGHUA UNIV
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