Avaliação da resitência de união de pinos de fibra de vidro cimentados com diferentes protocolos adesivos e submetidos à ciclagem mecânica / Evaluation of the bond strength of fiber posts cemented with different adhesives protocols and submitted to cycling loading


IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia




The objective of this study was to evaluate in vitro the bond strength of intracanal posts cemented using different adhesive protocols and not submitted to mechanical cycling. 80 roots were selected from bovine incisors with similar dimensions, which are included in polystyrene resin. The bodies of the test piece were divided into 10 experimental groups (n = 8), in accordance with the adhesive protocol performed, with each protocol eight samples were subjected to mechanical stress and not 8. The adhesive protocols performed are as follows: Groups 1 and 6 - cement RelyX Unicem; Groups 2:07 - cement RelyX Unicem with prior etching and application of the adhesive system Single Bond; Groups 3:08 - Resino cement Panavia F 2.0 and etching adhesive system Clearfil SE Bond Primer + ED; Groups 4:09 - RelyX ARC resin cement and adhesive system Scothbond Multi Purpose Plus; Groups 5:10 - Panavia F 2.0 ED primer and adhesive system. After cementation of prefabricated posts, cores were made of composite resin filling. 200,000 cycles were applied, with intermittent axial force 80N (1Hz). The push-out test was carried out at a speed of 0.5 mm / min and the values expressed in MPa obtained from each group were tabulated and analyzed for their normal. After this, we performed analysis of variance (ANOVA) and Tukey s test. According to the results, Unicem and Panavia cements applied according to manufacturer s instructions, had the lowest bond strength, no significant difference between the protocols other adhesives. In addition, there was no statistically significant difference between the groups submitted and not submitted to mechanical fatigue. According to this research, the implementation of new protocol designs can be feasible in the clinical success of the cementation of fiber glass in the canal since it brought advantages in bond strength evaluated.


dentística dentistry

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