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Effect of diphenyliodonium hexafluorphosphate in the yellowing and properties of experimental resin cements
Andrade, Kamila Menezes Guedes de; Mathias, Caroline; Vale, Hugo Felipe do; Aguiar, Flávio Henrique Baggio; Marchi, Giselle Maria.
  • Andrade, Kamila Menezes Guedes de; State University of Amazonas. Superior School of Health Sciences. Manaus. BR
  • Mathias, Caroline; State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry. Piracicaba. BR
  • Vale, Hugo Felipe do; State University of Amazonas. Superior School of Health Sciences. Manaus. BR
  • Aguiar, Flávio Henrique Baggio; State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry. Piracicaba. BR
  • Marchi, Giselle Maria; State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry. Piracicaba. BR
Braz. j. oral sci ; 18: e191591, jan.-dez. 2019. tab
Artículo en Inglés | LILACS, BBO | ID: biblio-1095170
ABSTRACT

Aim:

The yellowing effect is undesirable and can occur in the dental restoration margins when light-cured resin cements containing camphorquinone as photoinitiator is used. This study aimed to evaluate the effect of diphenyliodonium hexafluorphosphate (DPI) in photoinitiator systems that contained different concentrations of camphorquinone (CQ) and dimethylamino ethyl benzoate (EDAB) on resin cements.

Methods:

A base (11) of bisphenol A diglycidyl methacrylate (BisGMA) and triethylene glycol dimethacrylate (TEGDMA) was obtained, and 60wt% of glass fillers was added. Eight formulations were obtained RC1 (0.5mol% CQ / 1mol% EDAB), RC2 (0.5mol% CQ / 2mol% EDAB), RC3 (1mol% CQ / 1mol% EDAB), RC4 (1mol% CQ / 2mol% EDAB), and RC5 to RC8, which contained the same bases plus 0.5mol% DPI. Experimental resin cements were evaluated by the degree of conversion (DC), L*a*b* color analysis, water sorption (WS) and solubility (S), flexural strength, and Elastic Modulus. The data were analyzed by three-way ANOVA, Tukey's and Mann-Whitney tests (α = 0.05).

Results:

The combination of DPI and 0.5mol% CQ increased DC in RC6 and L* in RC5 without increasing the WS and a* b* values. CQ at 1mol% showed higher values of b* and lower values of a*, except for RC3. Groups with 2mol% EDAB showed higher DC.

Conclusion:

The addition of DPI reduces CQ, generating a decreased yellowing effect, while maintaining adequate properties in the resin cements, especially with 2mol% EDAB
Asunto(s)


Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Polímeros / Cementos de Resina / Fenómenos Físicos / Fotoiniciadores Dentales Idioma: Inglés Revista: Braz. j. oral sci Asunto de la revista: Odontología Año: 2019 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: State University of Amazonas/BR / State University of Campinas/BR

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Polímeros / Cementos de Resina / Fenómenos Físicos / Fotoiniciadores Dentales Idioma: Inglés Revista: Braz. j. oral sci Asunto de la revista: Odontología Año: 2019 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: State University of Amazonas/BR / State University of Campinas/BR