Erratum: Gender-specific in vivo measurement of the structural and mechanical properties of the human patellar tendon

2007 ◽  
Vol 25 (12) ◽  
pp. 1681-1681 ◽  
Author(s):  
Gladys N.L. Onambélé ◽  
Katherine Burgess ◽  
Stephen J. Pearson
Keyword(s):  
Mechanical Properties ◽  
Patellar Tendon ◽  
In Vivo Measurement ◽  
Gender Specific

Gender-specific in vivo measurement of the structural and mechanical properties of the human patellar tendon

2007 ◽  
Vol 25 (12) ◽  
pp. 1635-1642 ◽  
Author(s):  
Gladys N.L. Onambélé ◽  
Katherine Burgess ◽  
Stephen J. Pearson
Keyword(s):  
Mechanical Properties ◽  
Patellar Tendon ◽  
In Vivo Measurement ◽  
Gender Specific

scholarly journals Does knee joint cooling change in vivo patellar tendon mechanical properties?

2016 ◽  
Vol 116 (10) ◽  
pp. 1921-1929 ◽  
Author(s):  
Luis M. Alegre ◽  
Michael Hasler ◽  
Sebastian Wenger ◽  
Werner Nachbauer ◽  
Robert Csapo
Keyword(s):  
Mechanical Properties ◽  
Knee Joint ◽  
Patellar Tendon

Effects of Cyclic Stress on the Mechanical Properties of Cultured Collagen Fascicles from the Rabbit Patellar Tendon

2003 ◽  
Vol 125 (6) ◽  
pp. 893-901 ◽  
Author(s):  
Ei Yamamoto ◽  
Susumu Tokura ◽  
Kozaburo Hayashi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Patellar Tendon ◽  
Control Level ◽  
Quadratic Function ◽  
Peak Stress ◽  
Cyclic Stress ◽  
Original Strength

Effects of cyclic stress on the mechanical properties of collagen fascicles were studied by in vitro tissue culture experiments. Collagen fascicles (approximately 300 μm in diameter) obtained from the rabbit patellar tendon were applied cyclic load at 4 Hz for one hour per day during culture period for one or two weeks, and then their mechanical properties were determined using a micro-tensile tester. There was a statistically significant correlation between tensile strength and applied peak stress in the range of 0 to 5 MPa, and the relation was expressed by a quadratic function. The maximum strength (19.4 MPa) was obtained at the applied peak stress of 1.8 MPa. The tensile strength of fascicles were within a range of control values, if they were cultured under peak stresses between 1.1 and 2.6 MPa. Similar results were also observed in the tangent modulus, which was maintained at control level under applied peak stresses between 0.9 and 2.8 MPa. The stress of 0.9 to 1.1 MPa is equivalent to approximately 40% of the in vivo peak stress which is developed in the intact rabbit patellar tendon by running, whereas that of 2.6 to 2.8 MPa corresponds to approximately 120% of the in vivo peak stress. Therefore, the fascicles cultured under applied peak stresses of lower than 40% and higher than 120% of the in vivo peak stress do not keep the original strength and modulus. These results indicate that the mechanical properties of cultured collagen fascicles strongly depend upon the magnitude of the stress applied during culture, which are similar to our previous results observed in stress-shielded and overstressed patellar tendons in vivo.

Creep and the in vivo assessment of human patellar tendon mechanical properties

2007 ◽  
Vol 22 (6) ◽  
pp. 712-717 ◽  
Author(s):  
Stephen J. Pearson ◽  
Katherine Burgess ◽  
Gladys N.L. Onambele
Keyword(s):  
Mechanical Properties ◽  
Patellar Tendon ◽  
In Vivo Assessment

Development of novel techniques in vivo measurement of mechanical properties of periodontal ligament

2006 ◽  
Vol 39 ◽  
pp. S201-S202 ◽  
Author(s):  
H. Liu ◽  
S.L. Evans ◽  
C. Holt ◽  
A. Zhurov ◽  
J. Middleton ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Periodontal Ligament ◽  
In Vivo Measurement

Effects of Static Stress on the Mechanical Properties of Cultured Collagen Fascicles From the Rabbit Patellar Tendon

2001 ◽  
Vol 124 (1) ◽  
pp. 85-93 ◽  
Author(s):  
Ei Yamamoto ◽  
Wataru Iwanaga ◽  
Hiroshi Miyazaki ◽  
Kozaburo Hayashi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Applied Stress ◽  
Patellar Tendon ◽  
Control Level ◽  
Peak Stress ◽  
Static Stress ◽  
Tangent Modulus

In-vitro tissue culture experiments were performed to study the effects of static stress on the mechanical properties of collagen fascicles obtained from the rabbit patellar tendon. After collagen fascicles having the diameter of approximately 300 μm were cultured for 1 and 2 wk under static stress between 0 and 3 MPa, their mechanical properties and crimp morphology were determined using a micro-tensile tester and a light microscope, respectively. The tensile strength and tangent modulus of the fascicles were significantly decreased by culture under no load compared to control fascicles. A statistically significant correlation, which was described by a quadratic curve, was observed between applied stress and tensile strength. The maximum tensile strength (16.7 MPa) was obtained at the applied stress of 1.2 MPa; the strength was within a range of control values. There was a similar correlation between applied stress and tangent modulus, and the modulus was maintained at control level under 1.3 MPa stress. The stress of 1.2 to 1.3 MPa is equivalent to approximately 50 percent of the peak stress developed in the intact rabbit patellar tendon by running. Strain at failure of cultured collagen fascicles was negatively correlated with applied stress, and that at 1.2 to 1.3 MPa stress was almost the same as the control value. Crimp morphology in the fascicles cultured under about 1.2 MPa stress was similar to that in control fascicles. These results indicate that cultured collagen fascicles change the mechanical properties and structure in response to static tensile stress. In addition, their mechanical properties and structure are maintained at control level if the static stress of 50 percent of in-vivo peak stress is applied.

scholarly journals 8C-16 In Vivo Measurement of Elongation of Human Patellar Tendon Using MRI

2011 ◽  
Vol 2010.23 (0) ◽  
pp. 225-226
Author(s):  
Makoto SAKAMOTO ◽  
Ikumi OSADA ◽  
Kiyoko KAZAMA ◽  
Keisuke SASAGAWA ◽  
Yuji TANABE ◽  
...  
Keyword(s):  
Patellar Tendon ◽  
In Vivo Measurement
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