Effect of a universal adhesive on shear bond strengths of metal orthodontic brackets

Corresponding author: Assist. Prof. Aslıhan Zeynep Oz Ondokuz Mayıs University, Faculty of Dentistry, Department of Orthodontics, Samsun Phone: 0362 312 1919-8188, 05057038107 SUMMARY Aim: Due to the development in operative dentistry, some new bonding systems have been presented. The aim of this study was to investigate the effects of the use of a last generation universal adhesive on in vitro shear bond strengths and compare with controls. Material and methods: This study was conducted with 68-extracted human premolar. The samples divided in to four groups. In-group 1, enamel surfaces were etched and brackets were bonded with Transbond XT adhesive primer (3M Unitek, Monrovia, Calif). In-group 2, one-step self-etching primer (Transbond plus self-etching primer, 3M Unitek, Monrovia, CA, USA) was used. In group 3 teeth were etched 37% phosphoric acid for 10 seconds and brackets were bonded with universal adhesive (Clearfil Universal Bond, Kuraray, Noritake Dental Inc.) In-group 4, universal adhesive was used on self-etching mode. The same adhesive paste (Transbond XT, 3M Unitek, Monrovia, Calif) and light-curing times were used in all groups. Shear bond strengths of the samples were compared with analysis of variance (ANOVA). The amount of residual adhesive index (ARI) was also evaluated. Results: The mean shear bond strength values of 4 groups were 13.42±5.09 Mpa, 11.57±3.12 Mpa, 11.15±3.08, Mpa, 11,38±3.04 Mpa, respectively. There was no significant difference between the shear bond strengths of the groups. There was also no significant difference between the ARI scores. Conclusion: Universal adhesives can be used safely for orthodontic bracket bonding with etch or self-etching mode.