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Journal of Biomedical Optics • Open Access

Optical pen-size reflectometer for monitoring of early dental erosion in native and polished enamels
Author(s): Ekaterina Rakhmatullina; Anke Bossen; Kai K. Bachofner; Christoph Meier; Adrian Lussi

Paper Abstract

Application of the specular reflection intensity was previously reported for the quantification of early dental erosion. Further development of the technique and assembly of the miniaturized pen-size instrument are described. The optical system was adjusted to fit into a handy device which could potentially access different positions in the oral cavity. The assembled instrument could successfully detect early erosion progression in both polished (n=70 ) and native (n=20 ) human enamels. Different severities of enamel erosion were induced by varying incubation time of polished enamel in 1% citric acid (pH=3.60 , 0.5 to 10 min), while the native incisors were treated in the commercial orange juice (Tropicana Pure Premium®, pH=3.85 , 10 to 60 min). The instrument provided a good differentiation between various severities of the erosion in vitro. The size of the measurement spot affected the erosion monitoring in native enamel (human incisors). The erosion measurement in the 0.7-mm (diameter) cervical spots showed systematically lower reflection intensities compared with the analysis of central and incisal small spots. The application of larger spot areas (2.3 mm) for the erosion monitoring revealed no effect (p<0.05 ) of the spot position on the reflection signal. High variation of the teeth susceptibility toward in vitro erosion was detected in native enamel.

Paper Details

Date Published: 18 November 2013
PDF: 9 pages
J. Biomed. Opt. 18(11) 117009 doi: 10.1117/1.JBO.18.11.117009
Published in: Journal of Biomedical Optics Volume 18, Issue 11
Show Author Affiliations
Ekaterina Rakhmatullina, Inselspital Bern (Switzerland)
Anke Bossen, Berner Fachhochschule Technik und Informatik (Switzerland)
Kai K. Bachofner, Berner Fachhochschule Technik und Informatik (Switzerland)
Christoph Meier, Berner Fachhochschule Technik und Informatik (Switzerland)
Adrian Lussi, Inselspital Bern (Switzerland)

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