Erosive softening and erosive loss of enamel: Hardness and profilometry analysis

Authors

  • Priscila Maria Aranda Salomão Department of Biological Sciences – Bauru School of Dentistry – University of São Paulo – Bauru – SP – Brazil.
  • Daiana Moreli Soares dos Santos Department of Biological Sciences – Bauru School of Dentistry – University of São Paulo – Bauru – SP – Brazil.
  • Camila Perfeito Evangelista da Silva Department of Biological Sciences – Bauru School of Dentistry – University of São Paulo – Bauru – SP – Brazil.
  • Marília Afonso Rabelo Buzalaf Department of Biological Sciences – Bauru School of Dentistry – University of São Paulo – Bauru – SP – Brazil.
  • Annette Wiegand Department of Preventive Dentistry, Periodontology and Cariology – University of Göttingen – Göttingen – Germany.
  • Ana Carolina Magalhães Department of Biological Sciences – Bauru School of Dentistry – University of São Paulo – Bauru – SP – Brazil.

DOI:

https://doi.org/10.14295/bds.2016.v19i4.1330

Abstract

Objective – This study aimed to determine and differentiate erosive softening and enamel erosive loss induced by citric and hydrochloric acids. Material and Methods – Forty enamel specimens were divided into 2 groups: 1) 0.05 M citric acid (pH 2.5) simulating extrinsic erosion and 2) 0.01 M hydrochloric acid (pH 2.2) simulating intrinsic erosion. The enamel specimens were submitted to erosive challenges. Surface microhardness (softening) or contact profilometry (loss) was done after 30 s, after each 60 s up to 10 min, after each 5 min up to 30 min and after 60, 90 and 120 min. Results – Erosive softening (enamel hardness loss) was measurable up to 1 and 2 min for hydrochloric and citric acids, respectively. Erosive loss was significantly increased over time for both types of acids. After 8 min, citric acid was more aggressive than hydrochloric acid (p < 0.001). Conclusion – The progression of enamel erosion from erosive softening to erosive loss is highly dependent on the type of acid, being citric acid more aggressive in later stages. Therefore, this finding should be considered when choosing the method of analysis for laboratory studies.      

Keywords: Enamel; Erosive wear; Microhardness; Profilometry; Tooth erosion.

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Published

2016-11-29

How to Cite

1.
Salomão PMA, dos Santos DMS, da Silva CPE, Buzalaf MAR, Wiegand A, Magalhães AC. Erosive softening and erosive loss of enamel: Hardness and profilometry analysis. BDS [Internet]. 2016 Nov. 29 [cited 2025 Aug. 21];19(4):83-9. Available from: https://ojs.ict.unesp.br/index.php/cob/article/view/1330

Issue

Vol. 19 No. 4 (2016): Oct. - Dec. / 2016 - Published November 2016

Section

Clinical or Laboratorial Research

License

Brazilian Dental Science uses the Creative Commons (CC-BY 4.0) license, thus preserving the integrity of articles in an open access environment. The journal allows the author to retain publishing rights without restrictions.

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