TY - GEN
T1 - Elastic anisotropy and crystallites orientation in bovine cortical bone
AU - Mizukawa, Hirofumi
AU - Matsukawa, Mami
AU - Yamato, Yu
AU - Yamazaki, Kaoru
AU - Nagano, Akira
AU - Yanagitani, Takahiko
PY - 2006
Y1 - 2006
N2 - For the evaluation of osteoporosis using ultrasonic technique, it is important to know the characteristics of ultrasonic waves in the bone. In this study, distribution of ultrasonic wave properties in bovine femur is investigated using an ultrasonic pulse technique, considering the structure in the microscopic level. Especially, focusing on the anisotropy of cortical bone, the effect of crystallites orientation of bone mineral phase (mainly hydroxyapatite) is discussed. To obtain the HAp crystallites alignment, XRD patterns of specimens were measured. The preference ratio of HAp crystallites c-axis was derived by dividing the integral strength of (0002) peak by that of (31-40) peak. One interesting result is the higher BMD and density values of plexiform specimens. The higher BMD and density values mean the existence of large amount of HAp in the plexiform structure. This also seems to affect the high velocities in the plexiform specimens.
AB - For the evaluation of osteoporosis using ultrasonic technique, it is important to know the characteristics of ultrasonic waves in the bone. In this study, distribution of ultrasonic wave properties in bovine femur is investigated using an ultrasonic pulse technique, considering the structure in the microscopic level. Especially, focusing on the anisotropy of cortical bone, the effect of crystallites orientation of bone mineral phase (mainly hydroxyapatite) is discussed. To obtain the HAp crystallites alignment, XRD patterns of specimens were measured. The preference ratio of HAp crystallites c-axis was derived by dividing the integral strength of (0002) peak by that of (31-40) peak. One interesting result is the higher BMD and density values of plexiform specimens. The higher BMD and density values mean the existence of large amount of HAp in the plexiform structure. This also seems to affect the high velocities in the plexiform specimens.
KW - Cortical Bone
KW - Hydroxyapatite(HAp)
KW - Longitudinal wave velocity
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U2 - 10.1109/ULTSYM.2006.466
DO - 10.1109/ULTSYM.2006.466
M3 - Conference contribution
AN - SCOPUS:78649343915
SN - 1424402018
SN - 9781424402014
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 2120
EP - 2123
BT - 2006 IEEE International Ultrasonics Symposium, IUS
ER -