Properties of human dental hard tissues by THz-SDs transmission system
- Journal of Third Military Medical University Vol. 40, Issue 11, Pages: 1048-1052, 封三(2018)
- 作者机构：
- 作者简介：
- 基金信息：the Incubator Foundation of Interdisciplinary Laboratory of Physics and Biomedicine(WWS-2015-10)
DOI：10.16016/j.1000-5404.201801181
CLC：Received：22 January 2018，
Published：15 June 2018
- 稿件说明：
移动端阅览
Jiangwen CAI, Yu XIONG, Liguo ZHU, et al. Properties of human dental hard tissues by THz-SDs transmission system[J]. Journal of Third Military Medical University, 2018, 40(11): 1048-1052, 封三.
Jiangwen CAI, Yu XIONG, Liguo ZHU, et al. Properties of human dental hard tissues by THz-SDs transmission system[J]. Journal of Third Military Medical University, 2018, 40(11): 1048-1052, 封三. DOI： 10.16016/j.1000-5404.201801181.
摘要
Abstract
Objective
2
To explore the spectroscopical properties of human normal enamel and dentine by Terahertz time-domain spectroscopy (THz-SDs) transmission system
and to investigate the best parameter and frequency for imaging.
Methods
2
Fifteen intact third molars were freshly extracted and sliced mesiodistally to 0.7 mm in thickness
and ground serially with sand-papers under running tap water. Terahertz spectrum of enamel and dentin were obtained with the THz-SDs
and then the absorption coefficient
refractive index and refractive index ratio of the dental hard tissues were calculated in the frequency of 0.2 to 1.3 THz.
Results
2
① The absorption coefficient of enamel was statistically significantly different with that of dentin at 0.3
0.5 and 0.6 THz (
P
<
0.05); ② Obvious differences were also observed in the refractive index between enamel and dentin at the range of 0.2~1.3 THz (
P
<
0.05); ③ Since the refractive index may be more suitable to image the human dental hard tissue
and 0.3 THz was chosen to get the best contrast.
Conclusion
2
Terahertz can be used to identify enamel and dentin
and refractive index is more suitable to image dental hard tissue. At 0.3 THz
the refractive index contrast of enamel and dentin is the largest.
关键词
Keywords
references
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