Orthodontic Bracket bonded to Enamel pretreated with Er, Cr: YSGG, silver diamine fluoride and Self-Assembling Peptide P11-4. A Lab-based, SEM Assessment

Abstract

Objectives: The present study evaluates the shear bond strength (SBS) of metallic brackets bonded to enamel conditioned with Phosphoric acid (PA) and enamel conditioned with Er:Cr: YSGG laser in combination with prophylactic measures, i.e., silver diamine fluoride (SDF) and Self-assembling peptides (P114)

Methodology: The present in vitro lab-based study was approved by the ethical board of King Khalid University. The study duration was three months. Total 48 maxillary premolar teeth were disinfected and categorized into four groups following different surface conditioning regimes (n=12). Group-I (Control), Group-II ECL, Group-III-ECL+SDF, and Group-IV ECL+P114. Following the enamel conditioning with different conditioning regimes, brackets were bonded, and all samples were thermally aged. A pair of bonded samples from each conditioned group was assessed for enamel bracket interface via Scanning Electron Microscopy (SEM). The remaining ten bonded samples were evaluated for SBS testing and failure analysis. Intergroup comparisons between the investigated groups were performed using one-way analysis of variance (ANOVA) and Tukey’s post-hoc test.

Results: Enamel pretreated with PA demonstrated SBS values significantly higher than Group-II, Enamel conditioned with ECL only (p<0.05) but lower than Group-III- enamel conditioned with ECL+SDF and Group-IV, ECL+P114 (p<0.05)

Conclusion: ECL laser combined with 38% SDF or with P114, exhibits SBS values that are notably superior to those achieved with PA.