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Bond strength of resin composite to enamel submitted to at-home desensitizer and bleaching agents
Kury, Matheus; Silva, Bruna Guerra; Zandonadi, Francine de Almeida; Cunha, Leonardo Gonçalves da; Cavalli, Vanessa.
Afiliación
  • Kury, Matheus; University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry. Piracicaba. BR
  • Silva, Bruna Guerra; University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry. Piracicaba. BR
  • Zandonadi, Francine de Almeida; s.af
  • Cunha, Leonardo Gonçalves da; Federal University of Bahia. Dental School. Department of Dental Clinic. Salvador. BR
  • Cavalli, Vanessa; University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry. Piracicaba. BR
Braz. j. oral sci ; 20: e213859, jan.-dez. 2021. ilus
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-1253923
Biblioteca responsable: BR218.1
ABSTRACT

Aim:

This study evaluated the effect of a desensitizer agent (DES) during bleaching with 10% carbamide peroxide (CP) on enamel microshear bond strength (µSBS).

Methods:

Sixty bovine incisors were obtained and randomly distributed into groups (n=15) (C) Control no desensitizing or bleaching, (DES) desensitizing gel application, (CP) bleaching with 10% CP and (CP/DES) bleaching with 10% CP combined with DES. Bleaching was performed for 6 h/day for 14 consecutive days. DES was applied for 8 h only on the 7th and 14th days of therapy. Specimens were stored in artificial saliva among the CP or DES applications and submitted to µSBS testing at three postrestoration times (n=5) 24 h, 7 days, and 14 days after bleaching using a universal testing machine. Failure modes were observed under a stereomicroscope. Data were analyzed by two-way ANOVA and Tukey's test (α=5%).

Results:

Immediately after bleaching (24 h), CP promoted lower µSBS than the C and DES groups (p<0.05) but with no differences from the CP/DES. µSBS increased in the DES, CP, and CP/DES groups (p<0.05) when bonding was performed for 7 or 14 days elapsed from bleaching. CP/DES exhibited the highest µSBS among the groups 14 days after bleaching (p<0.05). Cohesive failure in enamel was predominant in the CP groups, while adhesive failure was mostly observed for the other groups.

Conclusion:

The use of a desensitizer during at-home bleaching maintained the enamel immediate bond strength, and its application favored bonding when the restoration was delayed for 14 days
Asunto(s)


Texto completo: Disponible Colección: Bases de datos internacionales Base de datos: BBO - Odontología / LILACS Asunto principal: Blanqueamiento de Dientes / Esmalte Dental / Resistencia al Corte Límite: Animales Idioma: Inglés Revista: Braz. j. oral sci Asunto de la revista: Odontología Año: 2021 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: Federal University of Bahia/BR / University of Campinas/BR

Texto completo: Disponible Colección: Bases de datos internacionales Base de datos: BBO - Odontología / LILACS Asunto principal: Blanqueamiento de Dientes / Esmalte Dental / Resistencia al Corte Límite: Animales Idioma: Inglés Revista: Braz. j. oral sci Asunto de la revista: Odontología Año: 2021 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: Federal University of Bahia/BR / University of Campinas/BR
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