Influence of tooth-surface hydration conditions on optical coherence-tomography imaging
Influence of tooth-surface hydration conditions on optical coherence-tomography imaging
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DOI：
10.1016/j.jdent.2011.06.004
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发表时间：
2011-08-01
影响因子：
4.4
通讯作者：
Kmaguchi, Shohei
中科院分区：
文献类型：
--
作者：
Shimamura, Yutaka;Murayama, Ryosuke;Kmaguchi, Shohei
目的：本研究探讨牙齿表面水合条件对光学相干断层扫描（OCT）imaging.Methods的影响：发射光耦合在一个单模光纤迈克尔逊干涉仪，并提供到一个样品和参考镜安装在一个线性平移振镜驱动的三角形电压波形在1 kHz的条纹调制频率。来自样品的反向散射光被耦合回系统，数字化并用于与光束扫描一起创建二维图像。OCT成像的咬合面10个提取的人牙进行安装后不久（“湿”的条件），后立即吹气10秒（“吹气”的条件），并在此后的间隔（“1分钟”，“5分钟”和“10分钟”的条件下，分别）。在高于噪声的水平下检测到反向散射光，可能导致OCT图像颗粒状。相比之下，两个不同的峰表明牙齿表面和牙本质-釉质交界处观察到的空气吹和10分钟的条件下，后者具有更大的信号强度。吹风条件下的强度低于潮湿条件下的强度。在室温下，在空气中储存期间的信号强度下降。结论：牙齿基质水合条件，从而出现影响时域OCT成像。(C)2011爱思唯尔有限公司保留所有权利。
Objectives: This study examined the influence of tooth-surface hydration conditions on optical coherence tomography (OCT) imaging.Methods: Emitted light was coupled in a single-mode fibre-optic Michelson interferometer, and delivered to a sample and a reference mirror mounted on a linearly translating galvanometer driven by a triangular voltage waveform at a fringe-modulation frequency of 1 kHz. Backscattered light from the sample was coupled back to the system, digitised and used to create two-dimensional images together with beam scanning. OCT imaging of the occlusal surfaces of 10 extracted human teeth was performed soon after mounting ('wet' condition), immediately after air blowing for 10 s ('air-blow' condition), and at intervals thereafter ('1-min', '5-min' and '10-min' conditions, respectively).Results: For the wet condition, three distinct peaks indicated the water surface, tooth surface and dentino-enamel junction. Backscattered light was detected at levels above noise, possibly causing grainy OCT images. By contrast, two distinct peaks indicating the tooth surface and dentino-enamel junction were observed for the air-blow and 10-min conditions, with greater signal intensities for the latter. The intensity was lower for the air-blow condition than the wet condition. The signal intensities decreased during storage in air at room temperature.Conclusion: Tooth-substrate hydration conditions thus appeared to influence time domain-OCT imaging. (C) 2011 Elsevier Ltd. All rights reserved.