In vitro Effect of Erosive Challenge on Surface Microhardness of Orthodontic Composites
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 andMethods:
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.
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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