Mechanical properties of human enamel based on resonant ultrasound spectroscopy
10.16156/j.1004-7220.2017.05.009
- VernacularTitle:基于超声共振谱方法的人牙釉质材料力学特性研究
- Author:
Dan-Dan FENG
1
;
Fan FAN
;
Rui WANG
;
Qiang ZHANG
;
Hai-Jun NIU
Author Information
1. 北京航空航天大学生物与医学工程学院
- Keywords:
Enamel;
Elastic constant;
Mechanical parameter;
Resonant ultrasound spectroscopy (RUS);
Resonant frequency
- From:
Journal of Medical Biomechanics
2017;32(5):448-453
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the mechanical properties of human enamel based on resonant ultrasound spectroscopy (RUS).Methods The rectangular parallelepiped specimens of human enamel were processed.The theoretical resonant frequencies of specimens were estimated and paired with the experimental resonant fre quencies measured from RUS experiments.An iterative procedure was used to adjust elastic constants of enamel until the theoretical frequencies corresponded to the experimental frequencies based on minimum mean-squared error criterion.In addition,elastic modulus,shear modulus and Poisson's ratio were calculated respectively.Results The elastic modulus,shear modulus and Poisson's ratio ranged from 61.52 to 80.46 GPa,21.51 to 51.86 GPa and 0.18 to 0.43,respectively.Eliminating the effect of large specimen variances,the average of elastic modulus,shear modulus and Poisson's ratio was 72.84 GPa,31.94 GPa and 0.27,respectively.Conclu sions RUS performs a feasibility of measuring the mechanical properties of human enamel with repeatable and nondestructive advantages.All the elastic constants and mechanical parameters can be estimated through a sig nal experiment.The results provide references for the development of biomimetic dental restoration materials.
