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首页> 外文会议>Optical diagnostics and sensing IX >Physical and thermal properties of human teeth determined by photomechanical, Photothermal images to rapidly diagnose
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Physical and thermal properties of human teeth determined by photomechanical, Photothermal images to rapidly diagnose

机译：通过光机械，光热图像确定的人类牙齿的物理和热特性，可快速诊断

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This paper details the current techniques for the detection of caries using non-invasive techniques, A promising option is tooth trans-illumination which is based on an increase of light scattering or light absorption in the affected tissue region. In this study trans-illumination applied to detect microscopic caries lesions was investigated using premolar teeth containing affected caries lesions. One line coincides with a carious absorption line, while the other is used as a reference. By this referencing the system is auto-calibrated continuously. Normal and carious human teeth were applied for the determination of N1R absorption by using a micro-spectrophotometer. Relative N1R absorption value for normal tooth and for carious one distributed in different quantity relating to the tooth structure, whereas the value showed much higher in enamel than in dentine. This paper suggests a way to use a commercially available system, which has the capability to carious detection. It is based on photomechanical and photothermal monitoring of teeth response. This technique is based on irradiation of the teeth with a short pulse Nd:YAG laser (1064 urn, 12 ns) and monitoring the laser-induced local thermal effects. This is realized with thermal imagers that locate the heated teeth absorbing zones. The photothermal (PT) image represents a two-dimensional depth-integrated temperature distribution in the irradiated volume and correlates with the conventional optical absorption coefficients. In addition to a description as to how each of the modalities function, consideration is given to recent advances and changes in the relevant technologies, and a comparison of relative benefits and shortfalls of the systems.
机译：本文详细介绍了当前使用非侵入性技术检测龋齿的技术。一种很有前途的选择是牙齿透射照明，其基于在受影响的组织区域中光散射或光吸收的增加。在这项研究中，使用含有受影响龋齿病变的前磨牙研究了透照法检测微小龋齿的问题。一条线与龋齿吸收线重合，而另一条线用作参考。通过该参考，系统可以连续自动校准。使用显微分光光度计，将正常和龋齿的人牙齿用于测定N1R吸收。正常牙齿和龋齿相对于牙齿结构以不同量分布的相对N1R吸收值，而牙釉质的N1R吸收值远高于牙本质。本文提出了一种使用市售系统的方法，该系统具有可检测的能力。它基于对牙齿反应的光机械和光热监​​测。该技术基于短脉冲Nd：YAG激光（1064 urn，12 ns）对牙齿的照射并监测激光引起的局部热效应。这是通过定位加热的牙齿吸收区域的热像仪实现的。光热（PT）图像代表了辐射体积中的二维深度积分温度分布，并且与常规的光吸收系数相关。除了描述每种方式的功能外，还考虑了相关技术的最新进展和变化，以及系统相对收益和不足的比较。

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