Abstract

Objective: Evaluating the bonding strength with push-out test in different root thirds of resin cements at fiberglass post with or without phosphate monomer (MDP). 

Methods: 32 roots of bovine incisors were divided into 04 groups with following cements and adhesive systems: RelyX Ultimate + Single Bond Universal (G1); Clear Fill Luting AS + Single Bond Adhesive (G2); Clear Fill Luting AS Self Adhesive (G3); RelyX ARC + Scotch Multi-Purpose Bond (G4). After cementing of the post, the roots were stored in distilled water at 37°C for 24h, then sectioned into six slices of 01 mm of thickness and subjected to push-out test in universal testing machine. 

Results: There was no statistic difference between the coronal thirds, except for the G4 (p > 0.05). 

Conclusion: There was difference of decreasing bond strength in coronary thirds in the apical direction. There was no improvement in adhesion when added phosphate monomers.

Keywords: Fiberglass Post; Bond Strength; Resin Cement

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