Objective: Observe the effect of pediatric medications on surface bovine enameland analized shear bond strengths (SBS) of composite resins.
Methods: One-hundred thirty five bovine teeth were used to evaluate SBS, whereas 10 teeth were used to observe them under a Scanning Electron Microscope (SEM) specimens and randomly assigned to 5 groups (n=27), according to the immersion solutions: GI: artificial saliva, GII: Paracetamol, GIII: Ibuprofen, GIV: Amoxicillin and GV: Metronidazole. Immersion cycles in medicines were undertaken under a 1-min agitation, which was performed three times daily, during 28 days. In all groups enamel was conditioned with a phosphoric acid and composite resin blocks were bonded to enamel surface. Samples were stored (37°C, 24 hours), tested, and statistically analyzed, with significance predetermined at p ≤0.05. The adhesive remnant index (ARI) was also evaluated and analyzed.
Results: The SBS of group II (10.8 ± 4.8 MPa) was higher significantly than group III (7.6 ± 2.6 MPa). The other groups showed no differences (group I: 9.4 ± 1.5 MPa, group IV: 9.0 ± 3.3 MPa and group V: 9.1 ± 4.6 MPa). Significant differences in Adhesive Remnant Index (ARI) scores were presented among all groups, the frequencies of the scores 0 and 1 were common in all groups, the greatest amount of adhesive remnant was found in the group V, followed by group IV. On the other hand, a lower quantity of residual adhesive was observed in groups I, II and III. In SEM analysis be observed changes on enamel surface in GII and GIII, presenting an irregular pattern with increased porosity, the other groups exhibited no differences (GI, GIV and GV).
Conclusion: Ibuprofen might be considered as a higher erosive potential medicament and low effect on bonding strength compared with other studies regarding pediatric medications.
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