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首页> 外文会议>Conference on Lasers in Dentistry Ⅷ, Jan 20-21, 2002, San Jose, USA >Assessment of dental caries with Optical Coherence Tomography: effect of ambient factors
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Assessment of dental caries with Optical Coherence Tomography: effect of ambient factors

机译：光学相干断层扫描技术评估龋齿：环境因素的影响

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摘要

Optical Coherence Tomography (OCT) has been used to produce longitudinal images of dental tissues. We investigated the influence on OCT system, of factors that could limit detection and quantitative monitoring of incipient caries. The effect of such factors as saliva, dental plaque, lesion staining, ambient lighting, and Dacron gauze (used to encourage plaque growth in in situ caries studies) on OCT imaging and analysis were determined during demineralisation to produce early caries. The system can collect A-scans, B-scans (longitudinal images) and C-scans (en-face images). Caries lesions were shown as volumes of reduced reflectivity. A-scan, which showed the levels of reflectivity versus the depth of penetration into the tooth tissue, was used for the quantitative analysis of the reflectivity loss. The reflectivity of the tooth tissue decreased with demineralisation. The percentage change in reflectivity of the tissue was quantified as a measure of the change in mineral status of the tissue following demineralisation. Neither the presence of saliva, plaque, Dacron gauze, plaque/Dacron gauze, nor lesion staining nor the level of ambient lighting significantly affected OCT detection and analysis of an incipient caries.
机译：光学相干断层扫描（OCT）已用于产生牙齿组织的纵向图像。我们调查了可能限制早期龋齿检测和定量监测的因素对OCT系统的影响。在脱矿质过程中确定了唾液，牙齿斑块，病变染色，环境照明和Dacron纱布（用于促进原位龋研究中斑块生长）等因素对OCT成像和分析的影响，以产生早期龋齿。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）。龋损显示为反射率降低的体积。 A扫描显示反射率水平与穿透牙组织的深度之间的关系，可用于反射率损失的定量分析。牙齿组织的反射率随脱矿质而降低。将组织反射率的百分比变化量化为脱盐后组织矿物质状态变化的量度。唾液，斑块，Dacron纱布，斑块/ Dacron纱布的存在，病变染色和周围照明的水平均未显着影响初期龋齿的OCT检测和分析。

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