| Summary: | 碩士 === 國立臺灣師範大學 === 光電科技研究所 === 106 === The teeth undergo constant remineralization and demineralization reactions in the oral environment. When the rate of demineralization is greater than remineralization, it is easy to cause dental caries, because early detection can prevent tooth decay. Because optical coherence tomography (OCT) has the advantages of non-invasive, high-speed imaging and high resolution compared to other techniques, in this study we used optical coherence tomography to observe the early demineralization of teeth. Looking forward to the future we can apply optical coherence tomography to the detection of early caries.
In this study, we used 37% phosphoric acid gel to simulate the acidic environment of the teeth and accelerated the experiment. Therefore, we applied 37% phosphoric acid to the surface of isolated human teeth to produce acid etching reaction. In addition, we used spectral-domain optical coherence tomography (Spectral-Domain OCT) was used to observe the changes of the shape and scattering intensity of the tooth surface during tooth demineralization. In addition, the optical coherence tomography was used to investigate the rate of acid etching, which was verified by our experimental results. Optical coherence tomography can quantify the structural changes caused by tooth erosion and can be used as a detection tool for early caries.
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