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Using Optical Attenuation Coefficient to Monitor the Efficacy of Fluoride and Nd:YAG Laser to Control Dentine Erosion

1
Instituto de Pesquisas Energeticas e Nucleares, Universidade de Sao Paulo, Sao Paulo 05508-000, Brazil
2
Faculdade de Odontologia, Universidade de Sao Paulo, Sao Paulo 05508-000, Brazil
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(7), 1485; https://doi.org/10.3390/app9071485
Received: 23 December 2018 / Revised: 7 February 2019 / Accepted: 21 February 2019 / Published: 9 April 2019
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Abstract

The present study evaluated the protective effects that are induced by fluoride and Nd:YAG laser irradiation to control dentine erosion. One hundred and twenty bovine dentine slabs were eroded with citric acid twice a day for a total period of 15 days. At day 10, the samples were randomly assigned into eight groups: C (Control); F (Fluoride); L1 (Nd:YAG laser, 1 W, 100 mJ, 79.5 J·cm−2); L2 (Nd:YAG laser, 0.7 W, 70 mJ, 55.7 J·cm−2); L3 (Nd:YAG laser, 0.5 W, 50 mJ, 39.7 J·cm−2); F + L1; F + L2; and, F + L3. Optical Coherence Tomography images were collected from the surface of the samples in order to monitor the alterations that were induced by erosion and the effectiveness of each treatment using the Optical Attenuation Coefficient (OAC). OAC values that were calculated for samples from groups C, F, L1, L3, FL1, and FL3 indicated no protective effects against the progression of erosive lesions. Samples from L2 and FL2 groups presented OAC values, indicating that laser irradiation under this condition did not induce the formation of craters on dentine tissue and promoted sufficient chemical and morphological changes to avoid the progression of dentine erosion. View Full-Text
Keywords: demineralization; dental erosion; optical coherence tomography; Nd:YAG laser; fluoride; optical attenuation coefficient; OCT; dentine erosion demineralization; dental erosion; optical coherence tomography; Nd:YAG laser; fluoride; optical attenuation coefficient; OCT; dentine erosion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Dias-Moraes, M.C.; Lima, C.A.; Freitas, A.Z.; Aranha, A.C.C.; Zezell, D.M. Using Optical Attenuation Coefficient to Monitor the Efficacy of Fluoride and Nd:YAG Laser to Control Dentine Erosion. Appl. Sci. 2019, 9, 1485.

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