Assessment of the effect of adhesion boosters on shear bond strength of orthodontic brackets on bleached teeth
Keywords:
adhesive, bleached teeth, shear bond strength, strength orthodonticAbstract
Background: The bleaching procedure results in damage to the outer enamel layer by forming porosities, which leads to demineralization and modification in the calcium–phosphate ratio. The present study was conducted to assess the effect of adhesion boosters on shear bond strength (SBS) of orthodontic brackets on bleached teeth. Materials & Methods: 60 maxillary premolars teeth were randomly divided equally into 2 groups. Group I were bleached teeth and group II had non-bleached teeth. Each group was further divided equally into 3 subgroups (n = 10) depending on the type of adhesive booster used (Enhance LC, All-bond 2, and no adhesive booster [control]). Maxillary premolars brackets were bonded. Debonding was done with a universal testing machine, and the SBS was recorded. Results: The mean shear bond strength (MPa) in Group IA was 10.5, in IB was 13.2, in IA was 10.5, in IC was 14.3, in IB was 13.2, in IC was 14.8, in IIA was 9.8, in IIB was 11.2, in IIA was 9.8, in IIC was 12.3, in IIB was 11.2 and in IIC was 12.8. The difference was significant (P< 0.05). Conclusion: Adhesive boosters increased the shear bond strength of both bleached and non-bleached teeth significantly.
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