Darling Cynthia L, Staninec Michal, Chan Kenneth H, Kang Hobin, Fried Daniel
Department of Preventative and Restorative Dental Sciences, University of California, San Francisco School of Dentistry, CA 94143-0758.
Proc SPIE Int Soc Opt Eng. 2012 Feb 9;8208:82080V-. doi: 10.1117/12.914633.
Previous studies have demonstrated that polarization sensitive optical coherence tomography (PS-OCT) can be used to image caries lesions in dentin, measure nondestructively the severity of dentin demineralization, and determine the efficacy of intervention with anticaries agents including fluoride and lasers. However, those studies were limited to artificial lesions on dentin and roots surfaces. The objective of this study is to determine if a cross polarization OCT system (CP-OCT) can be used to nondestructively measure a reduction in the reflectivity of natural root caries lesions after exposure to a remineralization solution. CP-OCT images of 11 teeth with existing root lesions were acquired before and after exposure to a remineralizing solution for 20 days. The integrated reflectivity was calculated after integrating to a fixed depth of 200-µm. There was a significant decrease in the integrated reflectivity after exposure to the remineralizing solution.
先前的研究表明，偏振敏感光学相干断层扫描（PS-OCT）可用于对牙本质中的龋损进行成像，无损测量牙本质脱矿的严重程度，并确定包括氟化物和激光在内的防龋剂的干预效果。然而，这些研究仅限于牙本质和牙根表面的人工龋损。本研究的目的是确定交叉偏振光学相干断层扫描系统（CP-OCT）是否可用于无损测量天然牙根龋损在接触再矿化溶液后反射率的降低。对11颗存在牙根龋损的牙齿在接触再矿化溶液20天前后获取CP-OCT图像。在积分至200μm的固定深度后计算积分反射率。接触再矿化溶液后，积分反射率显著降低。
