# Ready-to-use or Powder/Liquid Bioceramic Sealer: Micro-CT analysis of root canal filling removal according to ultrasonic agitation

## TL;DR

This study found that ultrasonic agitation effectively reduces root canal filling material, regardless of the sealer type or activation method.

## Contribution

The study provides empirical evidence on the effectiveness of ultrasonic agitation for root canal filling removal using micro-CT analysis.

## Key findings

- Ultrasonic agitation reduced residual filling material by 54.39% to 68.10% in the total area.
- The apical third showed a 56.25% to 73.21% reduction in residual material.
- No significant differences were found between sealer types or activation protocols.

## Abstract

This study evaluated the effectiveness of ultrasonic agitation in removing residual root canal filling material (RFM) from mandibular molars with isthmuses and to assess the influence of different bioceramic endodontic sealers, Bioroot RCS (BCS), and EndoSequence BC Sealer (ESBC).

Forty human mandibular molars were prepared with Reciproc R25 and divided based on the obturation material. The retreatment was performed (Reciproc R40) and the roots were randomly divided between agitation protocols (PUI/CUI) using a large solution volume (60 mL/canal).

The percentage reduction of RFM was measured after agitation. Ultrasonic agitation resulted in a percentage reduction of RFM ranging from 54.39% to 68.10% in the total area, and from 56.25% to 73.21% in the apical third (P < .05). No significant differences were found related to sealer type or activation protocol (P > .05).

While none of the protocols completely removed RFM, ultrasonic agitation proved effective in its reduction, independent of the sealer presentation and agitation method used.

Key words:Endodontics, Ultrasonic Agitation, Root Canal Irrigants, Root Canal Filling, X-ray Microtomography.