Light-curing of calcium hydroxide-based liners: pH analysis and calcium ion release

Authors

  • Paulo Fermino Costa Neto Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Odontologia de Araraquara, Departamento de Odontologia Restauradora, Araraquara, SP, Brazil. https://orcid.org/0000-0002-2127-5500
  • Mariana Bena Gelio Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Odontologia de Araraquara, Departamento de Odontologia Restauradora, Araraquara, SP, Brazil. https://orcid.org/0000-0003-0940-7651
  • Joissi Ferrari Zaniboni Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Odontologia de Araraquara, Departamento de Odontologia Restauradora, Araraquara, SP, Brazil. https://orcid.org/0000-0003-0172-9891
  • Jardel Camilo do Carmo Monteiro Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Odontologia de Araraquara, Departamento de Odontologia Restauradora, Araraquara, SP, Brazil. https://orcid.org/0000-0001-9389-2754
  • Adirson Jorge Júnior Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Odontologia de Araraquara, Departamento de Odontologia Restauradora, Araraquara, SP, Brazil. https://orcid.org/0000-0002-9788-525X
  • Milton Carlos Kuga Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Odontologia de Araraquara, Departamento de Odontologia Restauradora, Araraquara, SP, Brazil. https://orcid.org/0000-0001-5728-8293

DOI:

https://doi.org/10.4322/bds.2023.e3945

Abstract

Objective: Compare the pH values and calcium ion release of calcium hydroxide-based liner materials before and after light-curing. Material and Methods: The materials evaluated were: hydrox-cal white (HW), hydroxcal dentin (HD), Biocal (BC) and UltraBlend Plus (UB). 120 samples of the liner materials were inserted into a PVC tube (n=15). The samples from HW+A, HD+A, BC+A and UB+A were subjected to photoactivation. The other groups HW+N, HD+N, BC+N and UB+N were only inserted in a glass tube with deionized water. The pH was measured 24 hours and 14 days after the inclusion of the samples with the aid of a pH meter. The calcium release was analyzed with the aid of an atomic absorption spectophotometer at 24h and 14 days. The results were submitted to the Shapiro-Wilk test, followed by ANOVA and Tukey test (p=0.05). Results: In 24h, the groups that were not light cured showed the highest pH values (p<0.05). In 14 days, BC+N and BC+A demonstrated the lowest pH values. The groups that were not light cured also showed higher calcium release values in 24h and 14 days (p<0.05). Conclusion: Photoactivation of calcium hydroxide-based liner materials negatively interferes with calcium ion release, as well as with pH.

KEYWORDS

Acidification; Alkalinization; Calcium hydroxide; Hydrogen-ion concentration; Light-curing.

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Published

2023-12-13

Issue

Vol. 26 No. 4 (2023): Oct - Dec / 2023 - Published Oct 2023

Section

Clinical or Laboratorial Research