Elastic properties measurement of human enamel based on resonant ultrasound spectroscopy
Elastic properties measurement of human enamel based on resonant ultrasound spectroscopy
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基于共振超声光谱的人体牙釉质弹性特性测量
DOI：
10.1016/j.jmbbm.2018.09.014
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发表时间：
2019
影响因子：
3.9
通讯作者：
Laugier Pascal
中科院分区：
文献类型：
--
作者：
Niu Haijun;Fan Fan;Wang Rui;Zhang Qiang;Shen Fei;Ren Pengling;Liu Tao;Fan Yubo;Laugier Pascal
目的应用共振超声频谱技术（罗斯）研究人牙釉质的弹性特性。对于所有的标本，理论共振频率的计算使用瑞利-里兹方法，知道标本的质量密度和尺寸，并usinga优先常数。用罗斯法测量并提取了实验共振频率。然后，最佳的刚度常数，通过调整的理论共振频率的测量的基础上Levenberg-Marquardt方法。结果C11、C12、C13、C33、C44 5个独立的刚度常数分别为90.2 ± 6.65GPa、34.7 ± 6.90GPa、29.5 ± 4.82GPa、83.5 ± 8.93GPa、29.5 ± 4.82GPa、29.5 ± 4和37.0 ± 10.9 GPa。杨氏模量E11和E33、剪切模量G13和G12以及泊松比E12和E13分别为71.7 ± 7.34 GPa、69.2 ± 7.32 GPa、37.0 ± 10.9 GPa、28.1 ± 4.35 GPa、0.303 ± 0.098和0.248 ± 0.060。显著性弹性性能对于开发牙科材料和设计牙科修复体是至关重要的。罗斯法可以提供更精确的测量牙科材料的弹性性能。
ObjectivesTo investigate the elastic properties of human enamel using resonant ultrasound spectroscopy (RUS).MethodsSix rectangular parallelepiped specimens were prepared from six human third molars. For all specimens, the theoretical resonant frequencies were calculated using the Rayleigh-Ritz method, knowing the specimen mass density and dimensions, and usinga prioristiffness constants. The experimental resonant frequencies were measured and extracted by RUS. Then, the optimal stiffness constants were retrieved by adjustment of the theoretical resonant frequencies to the measured ones based on the Levenberg-Marquardt method. The engineering elastic moduli, including Young’s moduli, shear moduli, and Poisson’s ratios, were also calculated based on the optimal stiffness constants.ResultsThe five independent stiffness constantsC11,C12,C13,C33, andC44were 90.2 ± 6.65 GPa, 34.7 ± 6.90 GPa, 29.5 ± 4.82 GPa, 83.5 ± 8.93 GPa, and 37.0 ± 10.9 GPa, respectively. Young’s moduliE11andE33, shear moduliG13andG12, and Poisson’s ratiosυ12andυ13were 71.7 ± 7.34 GPa, 69.2 ± 7.32 GPa, 37.0 ± 10.9 GPa, 28.1 ± 4.35 GPa, 0.303 ± 0.098, and 0.248 ± 0.060, respectively.SignificanceElastic properties are critical for developing dental materials and designing dental prostheses. The RUS method may provide more precise measurement of elastic properties of dental materials.