Acesso endodôntico em lesão cervical não cariosa: analise in vitro

Abstract

This study aimed to evaluate the flexion angle of the file inside the root canal and the amount of instrumentation in a two-dimensional form with different endodontic accesses in teeth with LCNC (wedge-shaped). Thirty healthy lower central incisors were selected, divided into two groups: Tooth with LCNC restored with composite resin with conventional access - (AC); Tooth with LCNC not restored with alternative access (AA). After preparing root canals with Wave One Gold® files, specimens were radiographed with a phosphor plate before and after instrumentation in the distal mesial (MD) position, to obtain standardized radiographs of the same sample before and after treatment and with the presence of files within the root canal. The data were analyzed using appropriate statistical tests (α <0.05). There was a statistical difference in the AA group in coronary and middle thirds (p <0.001). The coronary third showed a statistically significant difference for the non-instrumented area. Both accesses were instrumented similarly in the apical region. There was a statistical difference in the flexion angles before and after instrumentation (p <0.001). Thus, the conventional access, that is, the AC group, presents a reduced file angle flexion when compared to AA, and a more non-instrumented area in the coronary third, AC leaves a smaller number of non-instrumented areas and can be considered safer, as it flexes the file less.