Appraisal of orthodontic brackets for Adhesive Remnant Index with and without primer: In vitro study

Abstract

Introduction: The elementary function of the primer is to boost the efficiency of the final bond. The secondary function is to protect the enamel from the ensuing demineralization by the acid-etching and to reduce marginal leakage. Primer computing is a step in the bonding procedure which necessitates increased chair time risk of moisture contamination and an increased procedural cost. Hence, the present study is intended to evaluate the Adhesive Remnant Index (ARI) for the site of bond failure. Methodology: Eighty extracted premolars procured from the department of orthodontics and private clinics divided into two groups with and without primer, after debonding the enamel surfaces, were examined under stereomicroscope of ×20 magnification for ARI, using the 4-point scale described by Artun and Bergland. Results: The frequency distribution of ARI with primer application showed statistically significant results. There were significant differences in debonded locations, between enamel-adhesive with primer and without primer. Conclusions: A conventional adhesive system with primers showed low ARI scores in comparison to adhesive system without primer.