title: The effect of an acidic food-simulating environment on the shear bond strength of self-ligating brackets with different base designs.
abstract: Aim. This study aims to evaluate the effect of acidic food simulant and (acetic acid 3%) on the shear bond strength (SBS) and adhesive remnant index (ARI) scores of one conventional and three different self-ligating brackets with different base designs. Materials and Methods. Freshly extracted first maxillary premolars (n = 160) were embedded in resin blocks. A conventional stainless steel bracket, Equilibrium 2, and three types of self-ligating brackets, Speed, In-Ovation R, and Damon 3MX, were bonded to teeth and exposed to distilled water (groups 1, 3, 5, and 7) or acetic acid 3% (groups 2, 4, 6, 8) for 12 weeks. SBS and ARI were calculated and statistical analysis was performed with the analysis of variance (SBS) or χ (2) test (ARI) to compare values between the different groups. Results. Equilibrium 2 and In-Ovation R showed a significantly lower SBS in the acidic environment than in distilled water. Significant differences in ARI scores were found for Equilibrium 2 after immersion in an acidic environment, shifting from 0 in distilled water to 2 in an acidic environment. Conclusions. Equilibrium 2 and In-Ovation R brackets showed a significant decrease in SBS after a 12-week immersion in acetic acid 3%, although all groups showed clinically acceptable SBS. Equilibrium 2 showed significant differences in ARI scores when exposed to acetic acid 3%.
authors.affiliation: Department of Orthodontics, Islamic Azad University, Dental School, Tehran Branch, No. 4, 10th Neyestan Alley, Pasdaran Avenue, P.O. Box 19585-175, Tehran, Iran.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Sheibaninia
authors.affiliation: Department of Orthodontics, Islamic Azad University, Dental School, Tehran Branch, No. 4, 10th Neyestan Alley, Pasdaran Avenue, P.O. Box 19585-175, Tehran, Iran.
authors.forename: Sepehr
authors.initials: S
authors.lastname: Sepasi
authors.affiliation: Department of Dental Materials, Islamic Azad University, Dental School, Tehran Branch, No. 4, 10th Neyestan Alley, Pasdaran Avenue, P.O. Box 19585-175, Tehran, Iran.
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Saghiri
authors.affiliation: Department of Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA.
authors.forename: Setareh
authors.initials: S
authors.lastname: Sepasi