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首页> 外文会议>Conference on Lasers in Dentistry IX Jan 26-27, 2003 San Jose, California, USA >Raman spectroscopy on dentin/resin interface of lased and unlased dental samples
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Raman spectroscopy on dentin/resin interface of lased and unlased dental samples

机译：激光和非激光牙科样品牙本质/树脂界面的拉曼光谱

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摘要

Cavities in human teeth were fabricated by means of Er:YAG laser and compared with samples processed by using conventional drill. The cavities of lased and unlased samples were cured with two different composite resins ( Bis-GMA vs PEX) to investigate differences in their adhesion properties. Morphological characterization of the sample surfaces by SEM analysis was performed. The same samples were then examined by micro-Raman spectroscopy by using He-Ne laser visible light excitation, in order to characterize the dentin/resin interfaces. The Raman spectra exhibited typical peaks of dentine. Resin contributions to the Raman spectra were also detected and have been used to monitor the interface properties of the boundary region. The dependence of the Raman spectrum on spatial position has been monitored. In both lased and unlased samples the PEX diffusion in dentine is limited in a region of order of 10 μm depth. A larger interdiffusion region is observed at the boundary of dentine and Bis-GMA resin.
机译：用Er：YAG激光制造人牙齿中的空腔，并与使用常规钻头加工的样品进行比较。用两种不同的复合树脂（Bis-GMA和PEX）固化激光和非激光样品的腔体，以研究其粘合性能的差异。通过SEM分析对样品表面进行了形态表征。然后使用He-Ne激光可见光激发通过显微拉曼光谱检查相同的样品，以表征牙本质/树脂界面。拉曼光谱显示出牙本质的典型峰。还检测了树脂对拉曼光谱的贡献，并已用于监测边界区域的界面特性。拉曼光谱对空间位置的依赖性已经被监测。在激光和非激光样品中，牙本质中的PEX扩散都限制在深度为10μm的区域内。在牙本质和Bis-GMA树脂的边界处观察到较大的相互扩散区​​域。

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