Factors influencing the tensile strength of repaired Achilles tendon: A biomechanical experiment study

In several applications, the industrial and protective fabrics might be subjected to punching by the rigid sharp spikes. Fabric resistance to the penetration of the puncher at a constant rate was studied. The analysis of the factors influencing the resistance of the fabric and an explanation of the puncture mechanism were generated. Punching force-displacement curves were obtained and four noticeable fabric failure modes were observed. A special setup was designed so that the fabric sample can be subjected to the biaxial stresses during the puncture tests. This paper studies the puncture behaviors of the plain, twill 1/3, and twill 2/2 woven fabric designs. It was found that the increase in the number of fabric layers from one to three and the number of picks/cm from 17.6 to 27.2 would elevate the punching resistance and the punching energy by 354% and 333%, respectively, with the insignificant change in the values of specific punching force and energy. Plain weave design proved to have higher values than twill design. A high correlation was observed between fabric tensile strength, fabric Young’s modulus, fabric failure energy and its punching force and punching energy.

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BMP-14 Gene Therapy Increases Tendon Tensile Strength in a Rat Model of Achilles Tendon Injury

The Journal of Bone and Joint Surgery (American) ◽

10.2106/jbjs.f.00257 ◽

2007 ◽

Vol 89 (6) ◽

pp. 1315-1320 ◽

Cited By ~ 47

Author(s):

Patrick Bolt ◽

Avnish Neil Clerk ◽

Hue H. Luu ◽

Quan Kang ◽

Jennifer L. Kummer ◽

...

Keyword(s):

Gene Therapy ◽

Tensile Strength ◽

Achilles Tendon ◽

Rat Model ◽

Tendon Injury

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Effects of low-density pulsed ultrasound treatment on transforming growth factor-beta, collagen level, histology, biomechanics, and function in repaired rat tendons

Turkish Journal of Physical Medicine and Rehabilitation ◽

10.5606/tftrd.2021.5118 ◽

2021 ◽

Vol 67 (2) ◽

pp. 167-174

Author(s):

Alperen İnceoğlu ◽

Füsun Şahin ◽

Nuray Akkaya ◽

Nusret Ök ◽

Çağdaş Yörükoğlu ◽

...

Keyword(s):

Gene Expression ◽

Tensile Strength ◽

Achilles Tendon ◽

Transforming Growth Factor Beta ◽

Transforming Growth Factor ◽

Low Density ◽

Pulsed Ultrasound ◽

Growth Factor Beta ◽

And Function ◽

Tgf Β1

Objectives: The aim of this study is to compare the effects of low-density pulsed ultrasound (LIPUS) treatment on growth factors/collagen production, histological, biomechanical, and function of rats with Achilles tendon injury. Materials and methods: A total of 44 Wistar Albino rats were used in the study between April 2017 and June 2018. The rats were randomized to two treatment groups. Group 1 (n=6) received LIPUS treatment (0.3 Watt/cm2; 1 MHz, 1:5 pulse mode) and Group 2 (n=6)received sham ultrasound (US) treatment following Achilles tendon surgery. Transforming growth factor-beta 1 (TGF-β1) and collagen gene expression levels were evaluated using polymerase chain reaction. The histological evaluation was performed with the Bonar scoring system. The tensile strength was measured by biomechanical testing and the function was evaluated with the Achilles Functional Index (AFI). Results: Although TGF-β1 expression and tensile strength evaluation showed a tendency to improve in favor of the LIPUS group, no statistically significant difference was found (p=0.065 and p=0.053, respectively). The COL3 gene expression in the LIPUS group and the COL1 expression in the sham US group were significantly higher. Bonar scores and AFI scores showed a statistically significant improvement in the LIPUS group, compared to the sham US group. Conclusion: Our study results show that LIPUS yields positive effects on tendon histology and functional status in repaired Achilles tendon in rats.

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Analysis of factors influencing tensile strength in dissimilar welds of AA2024 and AA6061 produced by Friction Stir Welding (FSW)

Australian Journal of Mechanical Engineering ◽

10.1080/14484846.2015.1093229 ◽

2016 ◽

Vol 15 (1) ◽

pp. 19-26 ◽

Cited By ~ 5

Author(s):

K. Jagathesh ◽

M.P. Jenarthanan ◽

P. Dinesh Babu ◽

C. Chanakyan

Keyword(s):

Tensile Strength ◽

Friction Stir Welding ◽

Friction Stir ◽

Factors Influencing ◽

Dissimilar Welds

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Comparison of tensile strength of continues-core method and 4 strand modifies method of after healing of repaired Kessler rabbit’s Achilles tendon injury

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/622/1/012021 ◽

2019 ◽

Vol 622 ◽

pp. 012021

Author(s):

P S Caksana ◽

IKS Kawiyana ◽

I W S Dusak ◽

T G T Nindhia

Keyword(s):

Tensile Strength ◽

Achilles Tendon ◽

Tendon Injury ◽

Core Method

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Factors Influencing Movement of Calcium in Vertebrate Striated Muscle

American Journal of Physiology-Legacy Content ◽

10.1152/ajplegacy.1958.195.3.705 ◽

1958 ◽

Vol 195 (3) ◽

pp. 705-711 ◽

Cited By ~ 6

Author(s):

Ethel Cosmos

Keyword(s):

Achilles Tendon ◽

Striated Muscle ◽

Specific Activity ◽

Daily Injection ◽

Factors Influencing ◽

Unstimulated Control ◽

Complete Exchange ◽

Frequency Of Stimulation ◽

Stimulation Of ◽

Total Exchange

Stimulation of isolated frog muscles at a frequency of one shock per second increases at first the rate of exchange of Ca40 with Ca45 but after 3 hours the total exchange is the same as in the unstimulated control muscles, only about 44% of the calcium being radioactive. Subsequent stimulation of the control muscles does not increase the specific activity. When Ca45 is injected i.p. in frogs the muscles exchange 26% of their Ca in 30 minutes and this level is not further increased for 8 hours. When the frog is stimulated at 15 shocks/min. the exchange becomes 100% in 400 minutes. With higher frequency of stimulation the complete exchange is achieved more rapidly. Repeated daily injection of Ca over a period of 6 days results in 80% exchange without stimulation. Stimulation of one leg only results in greater exchange in the stimulated leg. If the Achilles tendon is cut on one side and both sides are stimulated the exchange is more rapid on the operated side. Young rats injected with Ca45 exchange all their muscle Ca in 100 minutes without artificial stimulation.

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