4.5 Article

Retrievability of Calcium Silicate-based Root Canal Sealers During Retreatment: An Ex Vivo Study

Journal

JOURNAL OF ENDODONTICS
Volume 48, Issue 6, Pages 781-786

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.joen.2022.02.009

Keywords

Apical patency; calcium silicate-based root canal sealer; retreatment; retrievability; solution

Funding

  1. Foundation for Endodontics
  2. Endodontics Department at the University of Texas School of Dentistry at Houston
  3. American Association of Endodontists Foundation Resident Research Grant

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This study compared the retrievability of three different CSSs using different solutions. The results showed that BC, EBC, and NEO sealers had consistent retrievability in straight canals, but the retrievability decreased when solutions were used.
Introduction: The retrievability of calcium silicate-based sealers (CSSs) during nonsurgical retreatment has been equivocal. This study compared the retrievability of 3 different CSSs using 1 of 3 different solutions or no solution. Methods: A total of 130 extracted teeth with a straight canal were decoronated to a standardized root length. The canals were instrumented to 35/.04 and divided into 3 groups (BC: EndoSequence BC sealer; EBC: EdgeBioceramic; NEO: NeoSEALERFlo), and each group was further divided into 4 subgroups (6% sodium hypochlorite; 5% acetic acid; carbonated water; no solution). After sealer placement, each master gutta-percha cone was placed intentionally 2 mm short of the working length (WL) to ensure the apical 2 mm was filled only with sealer. After storage for 21 days at 37 degrees C and 100% humidity, retreatment was performed until apical patency was obtained. The operator was blinded to the CSS and solution used. Data were analyzed using analysis of variance to compare apical patency rates and the mock chair-times. Results: Overall success rates for apical patency in BC, EBC, and NEO were 63.64%, 69.77%, and 100%, respectively. There was significantly higher apical patency rate in NEO than BC and EBC. The chair-time for NEO was significantly shorter than BC (P<.05) and EBC sealer (P<.001). There was no significant difference in the chair-time between BC and EBC sealer groups. Conclusion: BC, EBC, and NEO sealers in a straight canal were consistently retrievable when no solution was used. Compared with no solution, the retrievability of BC, EBC, and NEO decreased when solutions were used.

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