Gardner T N, Elliott J C, Sklar Z, Briggs G A
Materials Department, University of Oxford, U.K.
J Biomech. 1992 Nov;25(11):1265-77. doi: 10.1016/0021-9290(92)90282-6.
Measurements of Rayleigh velocity and attenuation were taken in single mineral crystals of hydroxyapatite and fluorapatite at angular intervals relative to their c axes, using an acoustic microscope. These results are compared with the values that were calculated using the elastic constants of apatite from Yoon and Newnham [(1969) Am. Miner. 54, 1193-1197.] and Katz and Ukraincik [(1971) J. Biomechanics 4, 221-227.]. The slowness curves of various wave modes are plotted and discussed in relation to cross-coupling effects that were found to cause instability in measurements of attenuation for the c axes direction. Velocity measurements were taken in specimens of tooth enamel and bone. Here comparisons are made with the values that were calculated by modelling the 'z' scan response of the microscope, using published data for the elastic and acoustic properties. Comparisons are also made with the measurements on single crystals, since apatite is a major component of enamel and bone.
使用声学显微镜，在羟基磷灰石和氟磷灰石的单矿物晶体中，相对于它们的c轴以一定角度间隔测量瑞利速度和衰减。将这些结果与使用Yoon和Newnham [（1969年）《美国矿物学家》54卷，1193 - 1197页]以及Katz和Ukraincik [（1971年）《生物力学杂志》4卷，221 - 227页]中磷灰石的弹性常数计算得到的值进行比较。绘制了各种波模式的慢度曲线，并讨论了与交叉耦合效应的关系，发现交叉耦合效应会导致c轴方向衰减测量的不稳定性。在牙釉质和骨骼标本中进行了速度测量。在此，将其与通过使用已发表的弹性和声学特性数据对显微镜的“z”扫描响应进行建模计算得到的值进行比较。还与单晶测量结果进行了比较，因为磷灰石是牙釉质和骨骼的主要成分。
