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Artificial anterior cruciate ligament stretching and twisting combined load fatigue simulation device and test method thereof

A technology of anterior cruciate ligament and composite load, which is applied in the field of biomechanical property testing devices for biomedical textiles

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

[0004] The purpose of the present invention is to solve the technical problem of evaluating the fatigue performance of the artificial anterior cruciate ligament under the combined load of tension and torsion under more simulated conditions

Method used

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  • Artificial anterior cruciate ligament stretching and twisting combined load fatigue simulation device and test method thereof
  • Artificial anterior cruciate ligament stretching and twisting combined load fatigue simulation device and test method thereof
  • Artificial anterior cruciate ligament stretching and twisting combined load fatigue simulation device and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example records an artificial anterior cruciate ligament tensile torsion composite load fatigue simulation test method. The specific test steps are as follows:

[0031] Step 1: Prepare experimental materials: prepare a servo motor 37 with a frequency range of 0.5-10Hz, a turntable 36 with a radius of 30mm, a connecting rod 38 with a length of 100mm, a reciprocating linear rack 39 with a length of 100mm, and a diameter of A 25mm twist gear 33 is prepared for artificial anterior cruciate ligament sample A, the length L1 is 80mm, the diameter D1 is 6mm, and has been coated with fibrinogen.

[0032] Step 2: Check and adjust: place the connecting mechanism on the base of the fabric strength tester 2, use the headed pins to fix the fabric strength tester torsion test connection base 35 and the base of the fabric strength tester 2, and adjust the initial position of the reciprocating linear rack 39 at The position of the center point of the chute 310 changes the position ...

Embodiment 2

[0040] This example records an artificial anterior cruciate ligament tensile torsion composite load fatigue simulation test method. The specific test steps are as follows:

[0041] Step 1: Prepare experimental materials: prepare a servo motor 37 with a frequency range of 0.5-10Hz, a turntable 36 with a radius of 40mm, a connecting rod 38 with a length of 120mm, a reciprocating linear rack 39 with a length of 120mm, and a diameter of 30mm twisting gear 33, prepare artificial anterior cruciate ligament sample A, length L2 is 100mm, diameter D2 is 10mm, and has been coated with fibrinogen.

[0042] Step 2: Check and adjust: place the connecting mechanism on the base of the fabric strength tester 2, use the headed pins to fix the fabric strength tester torsion test connection base 35 and the base of the fabric strength tester 2, and adjust the initial position of the reciprocating linear rack 39 at The position of the center point of the chute 310 changes the position of the posit...

Embodiment 3

[0050] This example records an artificial anterior cruciate ligament tensile torsion composite load fatigue simulation test method. The specific test steps are as follows:

[0051] Step 1: Prepare experimental materials: prepare a servo motor 37 with a frequency range of 0.5-10Hz, a turntable 36 with a radius of 50mm, a connecting rod 38 with a length of 140mm, a reciprocating linear rack 39 with a length of 120mm, and a diameter of The 45mm twist gear 33 is prepared for the artificial anterior cruciate ligament sample A, the length L3 is 60mm, the diameter D3 is 12mm, and has been coated with fibrinogen.

[0052]Step 2: Check and adjust: place the connecting mechanism on the base of the fabric strength tester 2, use the headed pins to fix the fabric strength tester torsion test connection base 35 and the base of the fabric strength tester 2, and adjust the initial position of the reciprocating linear rack 39 at The position of the center point of the chute 310 changes the pos...

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Abstract

The invention relates to an artificial anterior cruciate ligament stretching and twisting combined load fatigue simulation device and a testing method thereof, and belongs to the technical field of biomechanical property testing devices for biomedical textiles. The device comprises a computer, a fabric strength tester, a tensile torsional fatigue testing device, a mechanical sensor and an upper end clamp, according to the invention, the stress environment of a human autologous anterior cruciate ligament under complex conditions is simulated in vitro; a tensile and torsional combined load fatigue simulation test is carried out on artificial anterior cruciate ligament samples with different fixed elongation rates, torsional angles and coating conditions; the blank of the artificial anteriorcruciate ligament stretching and torsion combined load fatigue performance test is filled, and a qualitative and quantitative theoretical basis is provided for the development of artificial anterior cruciate ligament products and the selection of clinicians.

Description

technical field [0001] The invention relates to an artificial anterior cruciate ligament tensile torsion composite load fatigue simulation device and a testing method thereof, belonging to the technical field of biomechanical performance testing devices for biomedical textiles. Background technique [0002] The anterior cruciate ligament is the main static stabilization mechanism for the flexion and rotation of the knee joint. There are more than 2 million cases of anterior cruciate ligament injury in the world every year. After the autologous ligament ruptures, the patient cannot repair it by itself and needs to be reconstructed by surgery. Autografts and allografts are the main options for anterior cruciate ligament grafts in the past, but they inevitably have a series of shortcomings such as insufficient sources, donor site damage, and the risk of immune rejection. At present, artificial anterior cruciate ligament has the advantages of controllable material source, no da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/38
CPCG01N3/38G01N2203/0007G01N2203/0026G01N2203/005G01N2203/0067G01N2203/0073
Inventor 林婧卢俊王璐管晓宁饶秉钧谢晓静李姝佳王富军赵金忠朱同贺蒋佳燕晓宇
Owner DONGHUA UNIV
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