A combined technique of photoacoustic sensor and laser-induced plasma spectroscopy is used to investigate the interaction of pulse Nd: YAG laser with healthy, carious dental tissue and amalgam. The results showed that applied force hence the corresponding pressure increases with laser fluence. At low fluences below the threshold ≈20 Jcm⁻², a bipolar thermoelastic signal was observed where gradually the amplitude of the compression part increased at higher values. A non-linear behaviour was observed at about threshold. The maximum pressure of ≈8 kPa was measured for healthy tissues. While the transmitted acoustic energy was increased with laser fluence, the corresponding ratio of acoustic to optical energy was decreased. The line emissions distinctly indicated both the matrix and non-matrix elements in healthy, carious and amalgam samples. The temperature of the majority of elements varied between 590 and 15000 K corresponding to tin and silver as lowest and highest respectively except for carbon at ≈4200 K. The high temperature vaporized products can raise some health issues, particularly to the patient if a large amount is inhaled.

使用光声传感器和激光诱导等离子体光谱的组合技术来研究脉冲Nd：YAG激光与健康龋齿牙齿组织和汞合金的相互作用。结果表明，施加的力因此相应的压力随激光能量密度而增加。在低于阈值≈20Jcm ^-2的低通量下，观察到双极热弹性信号，其中压缩部分的振幅在较高值处逐渐增加。在大约阈值处观察到非线性行为。测量了健康组织的最大压力≈8kPa。虽然随着激光能量密度增加了传输的声能，但相应的声能与光能之比却降低了。线发射清楚地表明了健康，龋齿和汞合金样品中的基质和非基质元素。大多数元素的温度在590和15000 K之间变化，对应于锡和银分别为最低和最高，除了碳在≈4200K之外。高温汽化产品会引起一些健康问题，特别是对于大量摄入的患者被吸入。