RESUMO

AIM: To evaluate the effect of different concentrations of nanostructured hydroxyapatite on the radiopacity, flow and film thickness of an experimental root canal sealer. METHODOLOGY: An experimental dual-cured root canal sealer was produced with a methacrylate-based co-monomer blend. Nanostructured hydroxyapatite/calcium tungstate solutions (ratios 10:90, 20:80, 30:70 and 40:60) were added to produce the sealer. Radiopacity was evaluated using a digital system and an aluminium step wedge (n=5). Flow and thickness tests were conducted in accordance with ISO 6876 (n=3). The data were analysed using one-way anova and Tukey's test (α=0.05). RESULTS: All groups had levels of radiopacity in accordance with ISO 6876. The flow of the experimental sealers was not significantly different (P=0.204). All groups had a film thickness in accordance with ISO 6876 and with no statistical difference (P = 0.654). CONCLUSION: The addition of up to 40% HA(nano) to root canal sealers did not alter their radiopacity and film thickness.

Assuntos

Materiais Biocompatíveis/química , Durapatita/química , Metacrilatos/química , Nanoestruturas/química , Materiais Restauradores do Canal Radicular/química , Peróxido de Benzoíla/química , Compostos de Cálcio/química , Cânfora/análogos & derivados , Cânfora/química , Meios de Contraste/química , Humanos , Teste de Materiais , Tamanho da Partícula , Poliuretanos/química , Cimentos de Resina/química , Silanos/química , Sonicação , Propriedades de Superfície , Temperatura , Fatores de Tempo , Toluidinas/química , Compostos de Tungstênio/química , Viscosidade