"Estudo da resistência da união e morfologia de adesivos autocondicionantes ao esmalte em função do tempo de armazenagem" / Bond strength measurements and and morphology of sel-etch systems to enamel in function of storage time

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

This study aimed to evaluate the resin-enamel bond strength, the etching pattern and the bonded interfaces provided by self-etch systems by means of scanning electron microscopy. The following adhesives systems (Scotchbond Multi-Purpose Plus [SBMP], Single Bond [SB], Clearfil SE Bond [CSE]; OptiBond Solo Plus Self-Etch [OP] or Tyrian Self Priming Etching [TY] were applied to sound enamel (after tooth prophylaxis), SiC paper or diamond bur-treated enamel. Resin composite buil-dups (Filtek Z250) were bonded to the enamel surfaces. After storage in water (24h/37°C), the bonded samples were sectioned into beams (0.8mm2), randomly assigned into subgroups (24h, 6 and 12 months) and subjected to microtensile bond strength test (0.5 mm/min). The data was analyzed by ANOVA and Tukey?s test. The main factors enamel Treatment and Storage as well as the interactions were not statistically significant. Significant differences were observed only for the main factor Adhesive (p<0.05). The Treatment did not affect the etching pattern of SBMP and SB; for CSE, OP and TY the morphology varied with the Treatment and Adhesive system. Gaps were not observed in the interfaces bonded with SBMP and SB, regardless of the Storage and Treatment. The adhesive CSE showed gaps after 12 months of storage for SiC paper, while this finding was observed for OP and TY in all conditions. Based on the results of the present investigation, it was concluded that the performance of some adhesive systems is influenced by the material´s composition instead of surface treatment or storage.

ASSUNTO(S)

adhesion adesão enamel micro morphology morfologia esmalte

ACESSO AO ARTIGO

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