Avaliação in vitro de diferentes protocolos utilizado na esplintagem dentária

Abstract

OBJECTIVE: This study evaluated in vitro "different protocols used in the dental splinting with fiber glass (FG), adhesive (Ad), resin flow (RF) and nanoparticle composite (RCN). MATERIALS AND METHODS: We made 84 resin blocks nanoparticule with dimensions 4.5 x 8 x 7 mm and divided into seven groups. The blocks were paired (n = 6) as the factor "protocol splinting": Gr1-Ad; Gr2- FV; Gr3- FV + Ad; GR4- RF + FV + Ad; GR5- FV + Ad + PR; GR6- FV+ Ad + PR +; GR7- RF + FV. After the sets were cut with a diamond disc double-sided on a lathe for cutting specific bodies-of - proof-shaped stick (CP) at the bonding interface of 1mm2 was later submitted to microtensile test (μTBS) in EMIC universal test machine at a speed of 1mm / s with load cell 50kgf. To determine the fracture, the adhesive interfaces were examined in a scanning electron microscope and the results submitted to analysis of variance one-factor ANOVA and Tukey test for comparison of means (α = 5%). RESULTS: Mean (MPa) and standard deviation for μTBS were Gr1-22.4 (13.4); Gr2-3.9 (4.2); Gr3-17.2 (7.7); GR4-12, 6 (6.9); GR5-6.4 (5.5); GR6-7.8 (9.7); GR7-12, 1 (10.9). Statistical analysis found significant differences between groups. CONCLUSION: CONCLUSION: There was a statistically significant difference (p <0.05) in bond strength between splinting protocols evaluated, the larger value of bond strength was obtained by the filing of a control group (resin + adhesive) between the test groups, the highest average value of bond strength was obtained by the protocol of group 3 (composite resin + glass fiber + adhesive).