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Journal of Biomedical Optics • Open Access

Application of the specular and diffuse reflection analysis for in vitro diagnostics of dental erosion: correlation with enamel softening, roughness, and calcium release
Author(s): Ekaterina Rakhmatullina; Xiaojie Wang; Barbara Beyeler; Adrian Lussi; Anke Bossen; Christoph Hoschele; Christoph Meier

Paper Abstract

We present assembly and application of an optical reflectometer for the analysis of dental erosion. The erosive procedure involved acid-induced softening and initial substance loss phases, which are considered to be difficult for visual diagnosis in a clinic. Change of the specular reflection signal showed the highest sensitivity for the detection of the early softening phase of erosion among tested methods. The exponential decrease of the specular reflection intensity with erosive duration was compared to the increase of enamel roughness. Surface roughness was measured by optical analysis, and the observed tendency was correlated with scanning electron microscopy images of eroded enamel. A high correlation between specular reflection intensity and measurement of enamel softening (r2 ≥ −0.86) as well as calcium release (r2 ≥ −0.86) was found during erosion progression. Measurement of diffuse reflection revealed higher tooth-to-tooth deviation in contrast to the analysis of specular reflection intensity and lower correlation with other applied methods (r2 = 0.42-0.48). The proposed optical method allows simple and fast surface analysis and could be used for further optimization and construction of the first noncontact and cost-effective diagnostic tool for early erosion assessment in vivo.

Paper Details

Date Published: 1 October 2011
PDF: 13 pages
J. Biomed. Opt. 16(10) 107002 doi: 10.1117/1.3631791
Published in: Journal of Biomedical Optics Volume 16, Issue 10
Show Author Affiliations
Ekaterina Rakhmatullina, Bern Univ. Hospital (Switzerland)
Xiaojie Wang, Bern Univ. Hospital (Switzerland)
Barbara Beyeler, Bern Univ. Hospital (Switzerland)
Adrian Lussi, Univ. Bern (Switzerland)
Anke Bossen, Berner Fachhochschule Technik und Informatik (Switzerland)
Christoph Hoschele, Berner Fachhochschule Technik und Informatik (Switzerland)
Christoph Meier, Berner Fachhochschule Technik und Informatik (Switzerland)

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