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首页> 外文会议>Conference on Lasers in Dentistry Ⅷ, Jan 20-21, 2002, San Jose, USA >Attenuation of 1310-nm and 1550-nm laser light through sound dental enamel
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Attenuation of 1310-nm and 1550-nm laser light through sound dental enamel

机译：通过健全的牙釉质衰减1310 nm和1550 nm激光

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摘要

Inexpensive laser diodes and fiber-optic technology have revived optical transillumination as a promising diagnostic method for the early detection of dental caries. The principal factor limiting transillumination through dental hard tissue is light scattering in the normal enamel and dentin. Previous studies have shown that the scattering coefficient decreases with increasing wavelength. Therefore, the near-IR region is likely to be well suited for fiber optic transillumination. The objective of this study was to measure the optical attenuation of near-IR light through dental enamel at 1310-nm and 1550-nm. These laser wavelengths are readily available due to their suitability for application to fiber optic communication. In this study the collimated transmission of laser light through polished thin sections of dental enamel for various thickness from 0.1 to 2.5 mm was measured in cuvettes of index matching fluid with n= 1.63. Beer-Lambert plots show that the attenuation coefficients are 3.1+-0.17cm~(-1) and 3.8+-0.17cm~(-1) for 1310-nm and 1550-nm, respectively. This study indicates that near-IR laser wavelengths are well-suited for the transillumination of dental enamel for caries detection since the attenuation through normal tissue is an order of magnitude less than in the visible.
机译：廉价的激光二极管和光纤技术已使光学透射法恢复为早期检测龋齿的有前途的诊断方法。限制通过牙齿硬组织进行透照的主要因素是正常牙釉质和牙本质中的光散射。先前的研究表明，散射系数随波长的增加而减小。因此，近红外区域很可能非常适合光纤透照。这项研究的目的是测量在1310 nm和1550 nm处通过牙釉质的近红外光的光学衰减。这些激光波长由于适用于光纤通信而容易获得。在这项研究中，在折射率匹配流体的比色杯中，以n = 1.63的方式测量了厚度为0.1至2.5 mm的激光通过抛光的牙釉质薄片的准直透射。 Beer-Lambert图显示，对于1310-nm和1550-nm，衰减系数分别为3.1 + -0.17cm〜（-1）和3.8 + -0.17cm〜（-1）。这项研究表明，近红外激光波长非常适合用于龋齿检测的牙釉质的透照，因为通过正常组织的衰减比可见光小一个数量级。

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