Efecto de mezclas experimentales para blanqueamiento interno preparadas con perborato de sodio o percarbonato de sodio y diferentes vehículos sobre las propiedades mecánicas de la dentina coronal

Autores/as

  • Antonia Patricia Oliveira Barros Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University -UNESP, Araraquara, SP, Brazil. Autor/a https://orcid.org/0000-0003-1036-8776
  • Joatan Lucas de Sousa Gomes Costa Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University -UNESP, Araraquara, SP, Brazil. School of Dentistry, Federal University of Mato Grosso do Sul – UFMS, Campo Grande, MS, Brazil. Autor/a https://orcid.org/0000-0002-3642-365X
  • Vitória Lacerda Santos Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University -UNESP, Araraquara, SP, Brazil. Autor/a https://orcid.org/0000-0002-0711-8816
  • Wilfredo Gustavo Escalante-Otárola School of Dentistry, Universidad Catolica de Santa Maria - UCSM, Arequipa, Peru. Autor/a https://orcid.org/0000-0003-4879-3938
  • Andréa Abi Rached Dantas Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University -UNESP, Araraquara, SP, Brazil. Autor/a https://orcid.org/0000-0002-8309-8837
  • Milton Carlos Kuga Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University -UNESP, Araraquara, SP, Brazil. Autor/a https://orcid.org/0000-0001-5728-8293

DOI:

https://doi.org/10.15517/0cgnnn18

Palabras clave:

Blanqueamiento dental; Dentina; Resistencia a la fractura; Microdureza.

Resumen

Este estudio evaluó los efectos de mezclas experimentales para blanqueamiento interno preparadas mediante la combinación de perborato de sodio (PS) o percarbonato de sodio (PCS) con agua destilada (AD) o peróxido de hidrógeno al 20% (PH) sobre la resistencia a la fractura coronaria, el patrón de fractura y la microdureza de la dentina. Cincuenta incisivos bovinos tratados endodónticamente fueron distribuidos en cinco grupos experimentales (n=10): CO-RE (control restaurado con resina compuesta), PS-AD, PS-PH, PCS-AD y PCS-PH. Después de dos sesiones de blanqueamiento intracoronario, los especímenes fueron restaurados inmediatamente con resina compuesta y sometidos a ensayos de resistencia a la fractura y evaluación del patrón de fractura. Para el análisis de microdureza cincuenta especímenes de dentina bovina fueron sometidos a los mismos protocolos de blanqueamiento y evaluados mediante la prueba de microdureza Knoop. Los datos fueron analizados mediante ANOVA y la prueba de Tukey con un nivel de significancia del 5%. Los grupos PS-PH y PCS-PH presentaron los menores valores de resistencia a la fractura y la mayor reducción de la microdureza dentinaria, difiriendo significativamente de los demás grupos (P<0,05), sin diferencias entre ellos (P>0,05). En contraste, los grupos CO-RE, PS-AD y PCS-AD mostraron valores similares de resistencia a la fractura y microdureza (P>0,05). Las fracturas no complicadas predominaron en todos los grupos. Los protocolos de blanqueamiento interno asociados con peróxido de hidrógeno redujeron la resistencia a la fractura y la microdureza dentinaria independientemente del agente blanqueador utilizado, mientras que los protocolos que emplearon agua destilada preservaron las propiedades mecánicas de la estructura dental, observándose un comportamiento similar entre el perborato y el percarbonato de sodio.

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Publicado

2026-11-05