Incorporation of a polymerization catalyst for improved mechanical behavior and physicochemical characteristics of a light-cured pulp capping material

Authors

  • Jéssyka Viviane Andrade Dias Universidade Federal do Rio Grande do Norte, Department of Dentistry. Natal, Brazil.
  • Letícia Virgínia de Freitas Chaves Universidade Federal do Rio Grande do Norte, Department of Dentistry. Natal, Brazil.
  • Rodolfo Xavier de Sousa-Lima Universidade Federal do Rio Grande do Norte, Department of Dentistry. Natal, Brazil. https://orcid.org/0000-0002-4968-1340
  • Boniek Castillo Dutra Borges Universidade Federal do Rio Grande do Norte, Department of Dentistry. Natal, Brazil.

DOI:

https://doi.org/10.4322/bds.2022.e2857

Abstract

Objective: To evaluate the influence of the incorporation of a polymerization catalyst to a light-cured pulp
capping material on mechanical behavior and physicochemical characteristics. Material and Methods: Different
percentages (2 wt%, and 4 wt%) of diphenyliodonium hexafluorophosphate (DPI) were incorporated into the
Ultra-Blend Plus, a resin-modified calcium-based cement. The material without incorporation of DPI (0 wt%)
served as control. Degree of Conversion (DC), Flexural Strength (FS), Elastic Modulus (EM), Water Sorption
(WSp), Solubility (Sl), and pH of eluate at 24-h, 72-h, and 7-day storage times were measured. One-way ANOVA/
Tukey posthoc tests were used to analyze the data (p <0.05). Results: For DC, FS, and EM, materials with
different % of DPI showed statistically significant differences, so that 0% provided the lowest values and 2% the
highest values. Materials with 0% and 2% of DPI provided statistically the lowest WSp, whilst material with 0%
of DPI showed statistically the highest Sl. Conclusion: All materials provided statistically similar pH to eluates
regardless of storage time, although only materials with DPI at 2% and 4% maintained pH of eluates statistically
similar from 72 h to 7 days storage times.


KEYWORDS
Light-cured pulp capping material; Polymerization catalyst; Pulp capping.

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Published

2022-03-14 — Updated on 2022-03-29

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Clinical or Laboratorial Research Manuscript