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首页> 外文会议>Conference on Lasers in Dentistry Ⅷ, Jan 20-21, 2002, San Jose, USA >Optical Coherence Tomography for dental caries detection and analysis
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Optical Coherence Tomography for dental caries detection and analysis

机译：光学相干断层扫描技术用于龋齿检测和分析

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摘要

The ability of an en-face Optical Coherence Tomography (OCT) system to detect and quantitatively monitor the demineralisation of teeth to produce enamel and dentine (root) caries was determined and validated with an established method of quantifying demineralisation, transverse microradiography (TMR). We used an OCT system which can collect A-scans, B-scans (longitudinal images) and C-scans (en-face images). The development of enamel and root caries, by 3-day demineralisation in acidic buffer solution, was assessed quantitatively every 24 hours. Caries lesions were shown as volumes of reduced reflectivity in both the transversal and longitudinal images. The A-scan, which showed the levels of reflectivity versus the depth of penetration into the tissue, was used for the quantitative analysis of the lesions. Results demonstrated that the reflectivity of tooth tissue decreased with increasing demineralisation time. A linear correlation was observed between the mineral loss in enamel (r=1.0) and dentine (r = 0.957) measured by TMR and the percentage reflectivity loss measured by OCT. We concluded that OCT could detect incipient enamel and root caries and quantitatively monitor the demineralisation of the tissue. The reflectivity loss in tooth tissue during demineralisation, measured by OCT, could be related to the amount of mineral lost during the demineralisation.
机译：确定了面部光学相干断层扫描（OCT）系统检测和定量监测牙齿脱矿物质以产生牙釉质和牙本质（根）龋的能力，并通过建立的定量脱矿物质的方法，横向显微X射线照相术（TMR）进行了验证。我们使用了一种OCT系统，该系统可以收集A扫描，B扫描（纵向图像）和C扫描（正面图像）。每24小时定量评估在酸性缓冲液中进行3天脱矿质后牙釉质和龋齿的发育情况。在横向和纵向图像中，龋损均显示为反射率降低的体积。 A扫描显示反射率水平与穿透组织的深度之间的关系，用于对病变进行定量分析。结果表明，牙齿组织的反射率随脱矿质时间的增加而降低。通过TMR测量的牙釉质（r = 1.0）和牙本质（r = 0.957）的矿物质损失与通过OCT测量的反射率损失百分比之间存在线性关系。我们得出的结论是，OCT可以检测牙釉质和龋齿的初期状态，并定量监测组织的脱矿质作用。用OCT测量的脱盐过程中牙齿组织中的反射率损失可能与脱盐过程中矿物损失的量有关。

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