Characterization of transparent dentin in attrited teeth using optical coherence tomography

Mona M. Mandurah, Alireza Sadr, Turki A. Bakhsh, Yasushi Shimada, Yasunori Sumi, Junji Tagami

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Attrition and wear of tooth surface occur with aging and result in loss of enamel, with exposure and histological changes in dentin. Dealing with attrited teeth and restoration of the lost tissue are clinically challenging. The main objective of this study is to characterize the exposed transparent dentin in the occlusal surface of attrited teeth by optical coherence tomography (OCT). Naturally attrited, extracted human teeth with occlusal-transparent dentin were investigated in comparison to sound and carious teeth. The teeth were subjected to OCT imaging and then cross-sectioned and polished. OCT B-scans were compared to light microscopy images of the same cross section. In OCT images, some changes were evident at the transparent dentin in attrited teeth. An OCT attenuation coefficient parameter (μt) was derived based on the Beer-Lambert law as a function of backscatter signal slope. The mean values of μt were 1.05 ± 0.3, 2.23 ± 0.4, and 0.61 ± 0.27 mm−1 for sound, carious, and transparent dentins, respectively. One-way ANOVA with Tukey’s post-hoc showed a significant difference between groups (p < 0.05). Physiological changes in transparent dentin that involve deposition of mineral casts in the dentinal tubules lead to lower attenuation of OCT signal. OCT has a potential role to detect transparent dentin on the surface of attrited teeth and can be used in the future as a clinical adjunct tool.

Original languageEnglish
Pages (from-to)1189-1196
Number of pages8
JournalLasers in Medical Science
Volume30
Issue number4
DOIs
Publication statusPublished - May 1 2015

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Keywords

  • Attenuation coefficient
  • Attrition
  • SS-OCT
  • Transparent dentin

ASJC Scopus subject areas

  • Surgery
  • Dermatology

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