Pulp chamber debridement using various irrigant activation techniques in teeth with truss endodontic access - Using a...

This study aimed to assess the effectiveness of different irrigant activation techniques in dissolving pulp tissue in the chamber of mandibular molars with Truss endodontic access, using a novel in vitro tooth model.

Twenty-four freshly extracted human mandibular molars were selected, sectioned longitudinally, and standardized volume of bovine pulp tissue was placed into the pulp chamber. The split halves were then reassembled, sealed, and subjected to biomechanical preparation. The samples were randomly assigned to three groups based on the irrigation technique used: Conventional needle irrigation (CNI), modified endovac irrigation (MEV), and passive ultrasonic irrigation (PUI). Tissue dissolution was evaluated using stereomicroscopic imaging at ×10-×22 magnification. Statistical analysis was done using one-way ANOVA and post hoc tests.

The PUI group exhibited the highest mean percentage of bovine pulp tissue dissolved, followed by the CNI and MEV groups. However, the differences among the three groups were not statistically significant (P > 0.05). None of the techniques was able to achieve complete dissolution of the pulp tissue.

All three irrigant activation techniques, CNI, MEV, and PUI, were similar in terms of bovine pulp tissue dissolution while using the truss access preparation in the new in vitro tooth model.