Evaluación in vitro de la superficie del esmalte dental después de la remoción de la resina para brackets metálicos con dos diferentes métodos

Objective: The aim of this study was to evaluate the topography of the tooth enamel surface after the removal of the resin for metal brackets comparing two different methods. Methods: In this experimental study 40 extracted human premolars randomly divided into two groups (n equal 20) were analyzed. Group A assessed removing resin by Arkansas stone (Rite.dent) while the group B used multilaminar tungsten carbide bur (JET), both at high speed. The tooth enamel surface was evaluated by a Discovery V12 stereomicroscope. The first evaluation was performed before placing the metal brackets, and finally after the removal of the remaining resin after brackets debonding. The final microscopic analysis was performed with two observers who were unaware of the results between them. ARI and ESI scales were used to determine the amount of remaining resin and assess the initial and final topography of the dental enamel respectively. Results: The group A surface mostly obtained had many large and deep scratches and no healthy enamel was evident. On the other hand, the bur used in group B caused mostly regular area equivalent to the presence of minor scratches and some healthy enamel. Conclusions: Both burs caused changes on enamel topography. Nevertheless Arkansas stone produces unsatisfactory results and is completely aggressive for enamel while using tungsten carbide bur has more conservative results.