Evaluation of changes in surface roughness and chemical composition of the composite and bovine enamel submitted different surface treatments / Avaliação das alterações de rugosidade superficial e composição química do compósito e esmalte dental bovino submetido a diferentes tratamentos superficiais

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

29/09/2009

RESUMO

Objectives: To evaluate qualitatively and quantitatively changes in the surface and chemical composition of bovine enamel and composite, using hydrogen peroxide 38% when submitted to different surface treatments. Method: It was used 120 fragments from the tooth surface of bovine incisors, and in one half was prepared and a standard cavity restored with composite. Subsequently, the specimens were submitted to thirty hundreds brushing cycles, immersion in two different drinks: orange juice (Del Valle ), Whiskey (Johnnie Walker ), and last session of bleaching with hydrogen peroxide 38%. The surface changes and mineral composition of enamel and composite was determined using a superficial roughness and by Micro-Fluorensce X-ray Dispersion Energy before and after treatments. Dada were statiscally tabulated and analyzed. Calcium and Fhosphorum relative amounts and Zirconium and Silica were measured on enamel and resin composite, respectively. Results: The results showed significant difference when compared to the control group and treatment group. Conclusion: It was concluded that all bleaching alone does not cause surface changes and loss of chemical components in both the enamel and composite resin; brushing significantly increased surface roughness of the composite and enamel, comparing the initial and final time, the Association of brushing with whitening enhances the effects of surface changes and chemical composition in both the enamel and the resin.

ASSUNTO(S)

beverages low ph toothbrushing micro-fluorescence x-ray hydrogen peroxide 38% micro-fluorescência de raios-x escovação simulada bebidas baixo ph peróxido de hidrogênio 38% odontologia

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