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首页> 外文会议>Conference on Lasers in Dentistry Ⅶ Jan 21-22, 2001, San Jose, USA >Dental Depth Profilometry using Simultaneous Frequency-Domain Infrared Photothermal Radiometry and Laser Luminescence for the Diagnosis of Dental Caries
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Dental Depth Profilometry using Simultaneous Frequency-Domain Infrared Photothermal Radiometry and Laser Luminescence for the Diagnosis of Dental Caries

机译：牙频轮廓仪同时使用频域红外光热辐射法和激光发光技术对龋齿的诊断

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摘要

Frequency-domain infrared photothermal radiometry is introduced as a dynamic dental diagnostic tool and its main features are compared with modulated laser luminescence for quantifying sound and carious enamel or dentin. Dental caries found in the fissures or grooves of teeth is very difficult to diagnose or quantify with the present clinical techniques. Visual examination and dental radiographs do not detect the presence of decay until there has been significant carious destruction of the tooth. A high-spatial-resolution dynamic experimental imaging set-up, which can provide simultaneous measurements of laser-induced frequency-domain infrared photothermal radiometric and luminescence signals from defects in teeth, was developed. Following optical absorption of laser photons, the new set-up can monitor simultaneously and independently the non-radiative (optical-to-thermal) conversion (infrared photothermal radiometry), and the radiative de-excitation (luminescence emission) in turbid media such as hard dental tissue.This work is intended to show the complementarity between modulated luminescence and photothermal frequency scans in detecting carious lesions in teeth. A sound extracted molar with a dentin-enamel interface was introduced to examine the depth profilometric abilities of the method. Occlusal surfaces of teeth with potential areas of demineralization or carious destruction in the fissures were examined and compared to the signals produced by the sound enamel establishing the depth profilometric abilities of the method. The significance to clinical dentistry lies in the potential of this technique to detect and monitor early carious lesions in the pits and fissures of teeth.
机译：介绍了频域红外光热辐射测定法作为一种动态牙科诊断工具，并将其主要特征与调制激光发光进行了比较，以量化声音和龋牙釉质或牙本质。用当前的临床技术很难诊断或量化在牙齿的裂缝或沟中发现的龋齿。目视检查和牙科X光片检查直到龋齿被严重破坏后才能检测到蛀牙的存在。开发了一种高空间分辨率的动态实验成像装置，该装置可以同时测量激光诱导的频域红外光热辐射和来自牙齿缺陷的发光信号。在对激光光子进行光吸收之后，新的设置可以同时并独立地监视混浊介质（例如，混浊介质）中的非辐射（光热）转换（红外光热辐射法）和辐射去激发（发光）。这项工作旨在显示调制的发光和光热频率扫描在检测牙齿龋齿之间的互补性。引入具有牙本质-牙釉质界面的声音提取的磨牙，以检查该方法的深度轮廓测量能力。检查牙齿的咬合面是否存在脱矿质或龋齿破坏的可能，并将其与声音珐琅质产生的信号进行比较，以确定该方法的深度轮廓测量能力。对于临床牙科的意义在于该技术在检测和监测牙齿的凹坑和裂缝中的早期龋损方面的潜力。

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