光学相干层析用于检测早期人工龋齿  

Hydration of Fingernail Investigated by Optical Coherence Tomography

作　　者：孟卓[1] 姚晓天[1] 姚晖[2] 刘铁根[1] 李燕妮[2] 王冠华[2] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室光偏振研究中心,天津300072 [2]天津市口腔医院暨南开大学附属口腔医院实验研究中心,天津300041

出　　处：《中国激光》2010年第11期2709-2713,共5页Chinese Journal of Lasers

基　　金：国家973计划(2010CB327802);国家自然科学基金(30770597);中国博士后科学基金(20100470782)资助课题

摘　　要：早期龋齿是由牙齿内部脱矿造成的,脱矿区导致后向散射系数增加。提出一种通过光学相干层析(OCT)检测早期龋齿的方法,通过研制的全光纤OCT系统对人离体牙齿进行成像,获得了正常人离体牙齿的二维断层图像,并采用酸蚀法对人正常离体牙齿分别进行了12,24,48,72,96和120 h人工体外龋齿建模,使用全光纤OCT系统对人工龋齿脱矿程度进行定量测量,测量结果满足人工致龋深度与人工致龋时间之间的线性关系,验证了通过采用OCT方法定量测量牙齿脱矿程度来检测早期龋齿的可行性。Early dental caries is caused by demineralization of the teeth, which results in the increasing backscattered coefficient of the lesion area. In the paper, a method is proposed for detecting early caries by using optical coherence tomograpby （OCT）. The two dimensional tomography images of the human teeth in vitro are obtained by using the development all fiber OCT system. Artificial caries model is made by chemical etching on the human teeth in vitro for 12, 24, 48, 72, 96 and 120 h, respectively. Using the OCT system, the level of demineralization is obtained quantitatively and the measurement data are obtained with different artificial time. The result shows that the depth of the artificial caries has the linear relationship with time. It is proved that OCT has the feasibility by detecting the level of demineralization for early caries diagnosis.

关 键 词：医用光学 光学相干层析 人工龋齿 早期龋齿 脱矿 

分 类 号：TN247[电子电信—物理电子学] R781.1[医药卫生—口腔医学]