TY - JOUR
T1 - Dynamic shear behavior of mandibular condylar cartilage is dependent on testing direction
AU - Tanaka, E.
AU - Iwabuchi, Y.
AU - Rego, E.B.
AU - Koolstra, J.H.
AU - Yamano, E.
AU - Hasegawa, T.
AU - Kawazoe, A.
AU - Kawai, N.
AU - Tanne, K.
PY - 2008
Y1 - 2008
N2 - Little information is available on the direction-dependency of shear behavior in mandibular condylar cartilage. Therefore, we tested the hypothesis that such a dependency of the dynamic shear properties is present in mandibular condylar cartilage. From each of 17 condyles, two cartilage-bone plugs were dissected and tested in a simple shear sandwich configuration under a compressive strain of 10%. Sinusoidal shear strain (frequency range: 0.01-10Hz) was applied in the medio-lateral or antero-posterior direction with an amplitude of 1.0%, 2.0%, and 3.0%. The magnitudes of the dynamic shear moduli, as calculated from the resulting shear stress, were found to increase with applied frequency and the shear strain amplitude. The values of vertical bar G*vertical bar, G' and G" for a medio-laterally applied shear were about 20-33% of those in the antero-posterior shear, although the loss tangent (elasticity/viscosity ratio) was almost the same. In conclusion, the present results clearly show the direction-dependent characteristic of the mandibular condylar cartilage in dynamic shear.
AB - Little information is available on the direction-dependency of shear behavior in mandibular condylar cartilage. Therefore, we tested the hypothesis that such a dependency of the dynamic shear properties is present in mandibular condylar cartilage. From each of 17 condyles, two cartilage-bone plugs were dissected and tested in a simple shear sandwich configuration under a compressive strain of 10%. Sinusoidal shear strain (frequency range: 0.01-10Hz) was applied in the medio-lateral or antero-posterior direction with an amplitude of 1.0%, 2.0%, and 3.0%. The magnitudes of the dynamic shear moduli, as calculated from the resulting shear stress, were found to increase with applied frequency and the shear strain amplitude. The values of vertical bar G*vertical bar, G' and G" for a medio-laterally applied shear were about 20-33% of those in the antero-posterior shear, although the loss tangent (elasticity/viscosity ratio) was almost the same. In conclusion, the present results clearly show the direction-dependent characteristic of the mandibular condylar cartilage in dynamic shear.
U2 - 10.1016/j.jbiomech.2007.12.012
DO - 10.1016/j.jbiomech.2007.12.012
M3 - Article
SN - 0021-9290
VL - 41
SP - 1119
EP - 1123
JO - Journal of Biomechanics
JF - Journal of Biomechanics
IS - 5
ER -