Raman spectroscopy analysis of dental enamel treated with whitening product – Influence of saliva in the remineralization

J. Silveira, S. Coutinho, D. Marques, J. Castro, A. Mata, M. L. Carvalho, S. Pessanha

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

In this work we present the analysis of dental enamel treated with an over-the-counter whitening product, bought in e-commerce at a very low cost, used without medical supervision in an abusive manner, in order to evaluate its demineralization action. Moreover, we studied the influence of renewal or non-renewal of saliva solution in which the specimens were stored throughout the study. The Degree of Demineralization was determined through the evaluation of the PO 4 3− symmetric stretching band (~959 cm −1 ) in Raman spectra of the specimens in different days during the course of the study. Results showed that a maximum of demineralization occurred between days 27 and 34 of application. Titration of the whitening product revealed a content of hydrogen peroxide 170-fold higher than what is allowed in Europe, according with legislation. Despite this extreme concentration of hydrogen peroxide, the demineralization was not as great as could be expected suggesting an important role of the pH of the solution in this demineralization mechanism.

Original languageEnglish
Pages (from-to)145-149
Number of pages5
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume198
DOIs
Publication statusPublished - 5 Jun 2018
Event40th Colloquium on Spectroscopicum Internationale (CSI) - Pisa, Italy
Duration: 11 Jun 201716 Jun 2017

Keywords

  • Degree demineralization
  • Raman
  • Whitening agent

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