Purpose: To evaluate whether fiber post surface conditioning techniques would influence the ultimate retentive strength of self-adhesive resin cements into the root canal. Methods: 50 single-rooted premolars with one root canal were endodontically treated and prepared to receive a fiber post. Five groups were formed (n=10) according to the post surface pre-treatment performed: (1) Silane application (Monobond S) for 60 seconds; (2) 10% hydrogen peroxide application for 20 minutes; (3) Rocatec Pre; (4) Silicate/silane coating (DT Light SL Post); (5) No treatment (DT Light Post). Two self-adhesive resin cements (RelyX Unicem and MaxCem) were used as luting agents. The bonded specimens were stored up to 1 month (37 degrees C and 100% humidity). The force required to dislodge the post (MPa) via an apical-coronal direction was measured with the push-out bond strength test (cross-head speed: 0.5 mm/minute until failure). Failure patterns were evaluated under SEM. Data was statistically analyzed with one-way ANOVA and Tukey tests (P< 0.05). Results: No increase in the push-out bond strength values were observed for RelyX Unicem, independently from the post surface treatment performed. MaxCem attained higher bond strengths when luted to silanated posts.

Effects of post surface treatments on the bond strength of self-adhesive cements

Mazzitelli, Claudia;Ferrari, Marco
2012

Abstract

Purpose: To evaluate whether fiber post surface conditioning techniques would influence the ultimate retentive strength of self-adhesive resin cements into the root canal. Methods: 50 single-rooted premolars with one root canal were endodontically treated and prepared to receive a fiber post. Five groups were formed (n=10) according to the post surface pre-treatment performed: (1) Silane application (Monobond S) for 60 seconds; (2) 10% hydrogen peroxide application for 20 minutes; (3) Rocatec Pre; (4) Silicate/silane coating (DT Light SL Post); (5) No treatment (DT Light Post). Two self-adhesive resin cements (RelyX Unicem and MaxCem) were used as luting agents. The bonded specimens were stored up to 1 month (37 degrees C and 100% humidity). The force required to dislodge the post (MPa) via an apical-coronal direction was measured with the push-out bond strength test (cross-head speed: 0.5 mm/minute until failure). Failure patterns were evaluated under SEM. Data was statistically analyzed with one-way ANOVA and Tukey tests (P< 0.05). Results: No increase in the push-out bond strength values were observed for RelyX Unicem, independently from the post surface treatment performed. MaxCem attained higher bond strengths when luted to silanated posts.
2012
Mazzitelli, Claudia; Papacchini, Federica; Monticelli, Francesca; Toledano, Manuel; Ferrari, Marco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/797326
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