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06.06.2020 | Original Article

Retreatability of BC Sealer and AH Plus root canal sealers using new supplementary instrumentation protocol during non-surgical endodontic retreatment

verfasst von: Bruno Monguilhott Crozeta, Fabiane Carneiro Lopes, Renato Menezes Silva, Yara Teresinha Correa Silva-Sousa, Letícia Freiria Moretti, Manoel Damião Sousa-Neto

Erschienen in: Clinical Oral Investigations | Ausgabe 3/2021

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Abstract

Objective

The aim of this study was to evaluate the efficacy of supplementary techniques (ultrasonic tip/XP-endo Finisher R) in removing remaining filling materials (gutta-percha/AHPlus/BCSealer) from oval-shaped root canals during non-surgical endodontic retreatment.

Material and methods

Twenty-eight distal roots of human mandibular molars with single and oval-shaped canals were initially shaped with a R40 instrument and filled with gutta-percha points and AH Plus (n = 14) or BC Sealer (n = 14) followed by an initial micro-CT scanning. Initial filling material removal was performed in all 28 samples with an R50 instrument, and all samples submitted to a second micro-CT. Supplementary techniques with ultrasonic tips or XP-endo Finisher R instruments were performed in each sealer group, and all samples submitted to a third micro-CT. The volume of remaining filling material was calculated for the entire canal as well as for the coronal, middle, and apical thirds. Statistical analyses were performed using T, ANOVA 3-way, and Tukey tests.

Results

Lower values of remnant filling material were found for BC Sealer (16.06 ± 14.34) compared to AH Plus (28.30 ± 10.54) (P < 0.001), and considering the supplementary technique, lower values of remnant filling material were found for the ultrasonic tip (18.95 ± 11.05) compared to XP-endo Finisher R (25.41 ± 15.81) (P = 0.025). Ultrasonic instruments significantly reduced the percentage of remaining filling material for both AH Plus (P = 0.04) and BC Sealer (P = 0.02) while XP-endo Finisher R was effective for AHPlus only (P = 0.04). The remaining filling material was observed in all samples regardless the filling material or the supplementary technique employed.

Conclusions

Supplementary techniques increased filling material removal; however, none of them was able to render root canals completely free from root fillings. Ultrasonic tips should be considered a good option for endodontic retreatment, especially for bioceramic cases.

Clinical relevance

Supplementary instrumentation techniques are effective tools to reduce the amount of filling materials during root canal retreatment.

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Titel: Retreatability of BC Sealer and AH Plus root canal sealers using new supplementary instrumentation protocol during non-surgical endodontic retreatment
verfasst von: Bruno Monguilhott Crozeta
Fabiane Carneiro Lopes
Renato Menezes Silva
Yara Teresinha Correa Silva-Sousa
Letícia Freiria Moretti
Manoel Damião Sousa-Neto
Publikationsdatum: 06.06.2020
Verlag: Springer Berlin Heidelberg
Erschienen in: Clinical Oral Investigations / Ausgabe 3/2021
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-020-03376-4

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Retreatability of BC Sealer and AH Plus root canal sealers using new supplementary instrumentation protocol during non-surgical endodontic retreatment