Relationship between analysis of laser speckle image and Knoop hardness on softening enamel.

Autor: Koshoji NH; Dep. of Biophotonics, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil; School of Engineering, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil., Prates RA; Dep. of Biophotonics, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil; School of Dentistry, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil. Electronic address: pratesra@uninove.br., Bussadori SK; Dep. of Biophotonics, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil; School of Dentistry, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil., Bortoletto CC; Dep. of Biophotonics, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil; School of Dentistry, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil., de Miranda Junior WG; School of Dentistry, Universidade de São Paulo (USP), São Paulo, Brazil., Librantz AF; School of Information Technology, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil; Dep. of Informatics and Knowledge Management, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil., Leal CR; Dep. of Biophotonics, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil; School of Dentistry, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil., Oliveira MT; School of Dentistry, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil., Deana AM; Dep. of Biophotonics, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil; School of Information Technology, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil; Dep. of Informatics and Knowledge Management, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil.
Jazyk: angličtina
Zdroj: Photodiagnosis and photodynamic therapy [Photodiagnosis Photodyn Ther] 2016 Sep; Vol. 15, pp. 139-42. Date of Electronic Publication: 2016 Jul 18.
DOI: 10.1016/j.pdpdt.2016.07.005
Abstrakt: Background: In this study is presented the correlation between laser speckle images and enamel hardness loss.
Methods: In order to shift the enamel hardness, a dental demineralization model was applied to 32 samples of vestibular bovine teeth. After they were cleaned, cut and polished, the samples were divided into 4 groups and immersed in 30ml of a cola-based soft drink for 10, 20, 30 and 40min twice a day for 7 consecutive days with half the surface protected by two layers of nail polish. Each sample was analyzed by Knoop hardness and laser speckle imaging.
Results: Pearson's correlation analysis demonstrated that the laser speckle image technique presents a strong correlation with the hardness loss of the enamel (r=0.7085, p<0.0001). This finding is corroborated by Blend & Altman analysis, in which the data presented a constant behavior throughout the whole interval. For both analyses, more than 95% of the data is within the confidence interval, as expected.
Conclusion: This work demonstrates, for the first time to our knowledge, an empirical model for correlating laser speckle images with the loss of tooth enamel hardness.
(Copyright © 2016. Published by Elsevier B.V.)
Databáze: MEDLINE
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