A new hand-held optical reflectometer to measure enamel erosion: correlation with surface hardness and calcium release.

Saads Carvalho, Thiago; Baumann, Tommy; Lussi, Adrian (2016). A new hand-held optical reflectometer to measure enamel erosion: correlation with surface hardness and calcium release. Scientific Reports, 6(25259), p. 25259. Nature Publishing Group 10.1038/srep25259

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In the present study, the surface reflection intensity (SRI) was measured from enamel with different induced erosion degrees using a hand-held pen-size reflectometer (Hand-Held) and a Table-Top reflectometer. To validate the Hand-Held reflectometer, we correlated its optical signals with the change of surface microhardness (SMH), and amount of calcium released from the enamel samples during erosion. We used 124 tooth enamel specimens that were exposed to an erosive challenge of either 1, 2, 4, 6, 8, or 10 minutes. SRI and SMH were measured before and after the erosive challenge and we also measured the amount of calcium released to the citric acid. Relative SRI loss (rSRIloss) and relative SMH loss (rSMHloss) were calculated. rSRIloss from the Hand-Held and the Table-Top reflectometers were similar and significantly correlated to rSMHloss and calcium release. The regression analyses showed a significant association between rSRIloss from both reflectometers and rSMHloss and calcium, showing that both reflectometers can be used to measure erosive demineralization of enamel. The Hand-Held reflectometer is capable of assessing in vitro erosion, correlating to other commonly used methods. It is small, easy to handle and provides fast measurement, being a possible candidate to measure erosion in clinical studies.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine

UniBE Contributor:

Saads Carvalho, Thiago; Baumann, Tommy and Lussi, Adrian

Subjects:

600 Technology > 610 Medicine & health

ISSN:

2045-2322

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Tommy Baumann

Date Deposited:

29 Sep 2016 14:46

Last Modified:

12 Jan 2017 15:39

Publisher DOI:

10.1038/srep25259

PubMed ID:

27121129

BORIS DOI:

10.7892/boris.88810

URI:

https://boris.unibe.ch/id/eprint/88810

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