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In vitro Effect of Erosive Challenge on Surface Microhardness of Orthodontic Composites
Vieira, Basílio Rodrigues; Firmino, Bruno Oliveira; de Medeiros, Maria Isabel Dantas; dos Santos, Rogério Lacerda; Guênes, Gymenna Maria Tenório; de Carvalho, Fabíola Galbiatti.
  • Vieira, Basílio Rodrigues; s.af
  • Firmino, Bruno Oliveira; s.af
  • de Medeiros, Maria Isabel Dantas; Federal University of Campina Grande. Department of Biological Sciences. Patos. BR
  • dos Santos, Rogério Lacerda; Federal University of Campina Grande. Department of Biological Sciences. Patos. BR
  • Guênes, Gymenna Maria Tenório; Federal University of Campina Grande. Department of Biological Sciences. Patos. BR
  • de Carvalho, Fabíola Galbiatti; Federal University of Paraíba. Department of Clinical and Social Dentistry. Joao Pessoa. BR
Pesqui. bras. odontopediatria clín. integr ; 16(1): 43-50, jan.-dez. 2016. tab
Artículo en Inglés | LILACS, BBO | ID: biblio-911081
ABSTRACT

Objective:

To evaluate in vitro the effect of erosive challenge and continuous immersion in cola drink on surface microhardness of orthodontic composites. Material and

Methods:

Forty samples of three composites (Transbond XT, Quick Cure and Ortho Cem) were prepared (4 x 2 mm) and distributed into 4 groups (n=10) erosive challenge, artificial saliva immersion (control 1), continuous cola immersion and artificial saliva immersion (control 2). Erosive challenge was performed 4 times per day (5 min) in cola drink for 2 h in artificial saliva for 7 days. Samples of continuous cola immersion group were soaked in cola drink for 5 weeks and the beverage was renewed every two days. Control samples were immersed in artificial saliva for 7 days (control 1) and 5 weeks (control 2). Vickers microhardness (VHN) measurements were performed before and after erosive challenge and continuous immersion. Data were evaluated by paired Student's T-test, ANOVA one-way and Tukey tests (α = 0.05).

Results:

After 7 days of erosive challenge, there was no statistical difference between VHN values before and after erosive challenge and artificial saliva immersion. However, after 5 weeks of cola drink and artificial saliva immersion, significant reduction in VHN values was observed for all composites when compared to baseline values, and specimens immersed in cola drink showed lower VHN compared to those immersed in saliva, regardless of composite composition.

Conclusion:

After 7 days of erosive challenge, there was no alteration in superficial VHN of orthodontic composites. However, after 5 weeks of immersion in cola drink, significant reduction of VHN values was observed for all composites.
Asunto(s)


Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Aparatos Ortodóncicos / Erosión de los Dientes / Técnicas In Vitro / Resinas Compuestas País/Región como asunto: America del Sur / Brasil Idioma: Inglés Revista: Pesqui. bras. odontopediatria clín. integr Asunto de la revista: Odontología Año: 2016 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: Federal University of Campina Grande/BR / Federal University of Paraíba/BR

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Aparatos Ortodóncicos / Erosión de los Dientes / Técnicas In Vitro / Resinas Compuestas País/Región como asunto: America del Sur / Brasil Idioma: Inglés Revista: Pesqui. bras. odontopediatria clín. integr Asunto de la revista: Odontología Año: 2016 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: Federal University of Campina Grande/BR / Federal University of Paraíba/BR