Early diagnosis of teeth caries with non-invasive optical coherence tomography

Yen Li Wang, Chia Yen Ke, Hsiang Chieh Lee, Ya Ju Lee, Meng Tsan Tsai

Research output: Contribution to journalConference articlepeer-review


In this study, optical coherence tomography (OCT) was implemented for characterizing the early demineralization on enamel topology. 37% phosphoric acid was used to simulate the acid environment in the oral cavity and accelerates the acid effect. After temporally applying the phosphoric acid on the teeth surface, the changes in morphology and optical property of teeth can be identified with OCT. The OCT results illustrate the scattering intensity significantly increased during teeth demineralization. Therefore, the results obtained before and after acid application are quantitatively compared, based on the estimation of scattering coefficient and surface roughness. The estimated scattering coefficient increased with time during acid application and the same trend also can be found from the results of surface roughness. The results indicate that the demineralization on the teeth surface can be detected, enabling to further detect the early-stage cavities.

Original languageEnglish
Article number1114001-204
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2019
EventBiomedical Imaging and Sensing Conference 2019, BISC 2019 - Yokohama, Japan
Duration: 2019 Apr 222019 Apr 26


  • Caries
  • Optical coherence tomography
  • Scattering
  • Tooth

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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