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Does the ultrasonic activation of sealer hinder the root canal retreatment?

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Clinical Oral Investigations Aims and scope Submit manuscript

Abstract

Objectives

To evaluate if the ultrasonic activation of sealer hinders the root canal retreatment.

Materials and methods

Thirty mandibular premolars were prepared using the ProTaper Universal system (Dentsply) until the instrument F3 (0.30/0.09). The canals were distributed into 2 groups (n = 15), according to the filling technique: NUact group - sealer without ultrasonic activation + gutta-percha cones and Uact group - sealer with ultrasonic activation + gutta-percha cones. The canals were re-instrumented with Largo burs, followed by the instrument R50 (0.50/0.05) of the Reciproc system. The time required to perform re-instrumentation was recorded (s). The roots were longitudinally cleaved, and the total area of root canal and remaining filling material were quantified (%). The ANOVA test was applied to the data and complemented by Student’s t test (P < 0.05).

Results

Uact group had higher percentage of remaining filling material than NUact group (P < 0.05). When the root thirds were considered, there was statistically significant difference only for Uact group at the apical third (P < 0.05). There was no difference between groups regarding the time required to perform re-instrumentation (P > 0.05).

Conclusions

Ultrasonic activation of sealer leads to a higher percentage of remaining filling material attached to the root canal walls. However, it did not affect the retreatment time.

Clinical significance

Ultrasonic activation increases sealer penetration into dentinal tubules, improving its resistance to dislodgement. However, there is no scientific evidence to prove if ultrasonic activation of sealer hinders its removal when root canal retreatment is necessary.

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Funding

This study was self-funded and did not receive external financial support.

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Authors and Affiliations

  1. Superior School of Health Sciences, State University of Amazonas, Manaus, AM, Brazil

    Ana Paula da Silva Machado, André Augusto Franco Marques & Fredson Márcio Acris de Carvalho

  2. School of Dentistry, Federal University of Amazonas, Manaus, AM, Brazil

    Antônio Caetano Câncio Couto de Souza, Tamille Lima Gonçalves & André Augusto Franco Marques

  3. Department of Dentistry - Endodontics Division, Health Sciences Center, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Florianópolis, Santa Catarina, 88040-900, Brazil

    Lucas da Fonseca Roberti Garcia & Eduardo Antunes Bortoluzzi

Authors
  1. Ana Paula da Silva Machado
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  2. Antônio Caetano Câncio Couto de Souza
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  3. Tamille Lima Gonçalves
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  4. André Augusto Franco Marques
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  5. Lucas da Fonseca Roberti Garcia
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  6. Eduardo Antunes Bortoluzzi
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  7. Fredson Márcio Acris de Carvalho
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Contributions

The authors of the present study declare that they have contributed significantly and are in agreement with the manuscript content.

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Correspondence to Lucas da Fonseca Roberti Garcia.

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da Silva Machado, A., Câncio Couto de Souza, A., Lima Gonçalves, T. et al. Does the ultrasonic activation of sealer hinder the root canal retreatment?. Clin Oral Invest 25, 4401–4406 (2021). https://doi.org/10.1007/s00784-020-03752-0

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  • DOI: https://doi.org/10.1007/s00784-020-03752-0

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