Avaliação do efeito da profilaxia profissional com jato de bicarbonato de sódio sobre o esmalte de dente bovino e do efeito remineralizador da saliva artificial. Estudo in vitro / Evaluation of the professional prophylaxis effect with sodium bicarbonate jet on bovine tooth enamel and the remineralizing effect of artificial saliva. An In vitro study

AUTOR(ES)

Helena Zaramella Vono Ribeiro

DATA DE PUBLICAÇÃO

2005

RESUMO

The purpose of this study was to evaluate, in vitro, the alterations caused by the sodium bicarbonate jet on the sound bovine enamel and the further remineralizing effect of artificial saliva in different time periods. Fifteen enamel samples (4,0mm x 4,0mm) were used, which constituted the groups MI (no treatment), MII (treatment with sodium bicarbonate jet), MIII (treatment with sodium bicarbonate jet and immersion in saliva for one hour), MIV (treatment with sodium bicarbonate jet and immersion in saliva for 24 hours), MV (treatment with sodium bicarbonate jet and immersion in saliva for 7 days) and DI (treatment with sodium bicarbonate jet), DII (treatment with sodium bicarbonate jet and immersion in saliva for one hour), DIII (treatment with sodium bicarbonate jet and immersion in saliva for 24 hours) and DIV (treatment with sodium bicarbonate jet and immersion in saliva for 7 days). Following treatment with sodium bicarbonate jet, the samples were immersed in 20ml artificial saliva, individually stored in buffered plastic vials, in klin at 37oC, by the above mentioned periods of time. The saliva was renewed every day. Microhardness tests were carried out using a microdurometer and wear tests by a rugosimeter. The data were assessed by the one criterion variance analysis and Tukey test. The mean value of microhardness, in KHN, in groups MI, MII, MIII, MIV and MV were 359,80; 335,46; 369,20; 377,73 and 341,86, respectively, whereas the mean values in µm, of wear for group DI, DII, DIII and DIV were 0,564; 0,519; 0,441 and 0,428, respectively. It was concluded that: the sodium bicarbonate jet caused a wear and a reduction in microhardness on the enamel surface; saliva promoted the recovery of initial condition surface microhardness and reduced the wear; the repairing effect of saliva on the surface microhardness alterations occurred within on hour of treatment, having no significant statistical difference from the effect obtained in 24 hours; the best saliva repairing effect on the wear occurred with treatment of 24 hours.

ASSUNTO(S)

profilaxia dentária odontopediatria

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