Evaluation of apical transportation and apical root sealing in root canals prepared with mtwo rotary system with and without apical enlargement – an in vitro study

Matheus Albino Souza; João Paulo De Carli; Fernando Tolfo Rodrigues; Larissa  Piuco; Karolina  Frick Bischoff; Juliane  Bervian; Julia  Zandoná; Estela  Marta Doffo Winocur; Adriana de Jesus Soares

doi:10.14393/BJ-v37n0a2021-56141

Authors

Matheus Albino Souza Universidade de Passo Fundo https://orcid.org/0000-0002-9412-3807
João Paulo De Carli Universidade de Passo Fundo https://orcid.org/0000-0002-4705-6226
Fernando Tolfo Rodrigues Universidade de Passo Fundo https://orcid.org/0000-0002-0369-9481
Larissa Piuco Universidade de Passo Fundo https://orcid.org/0000-0003-4680-9991
Karolina Frick Bischoff Universidade de Passo Fundo https://orcid.org/0000-0001-7805-5253
Juliane Bervian Universidade de Passo Fundo https://orcid.org/0000-0001-5718-3539
Julia Zandoná Universidade Federal do Rio Grande do Sul https://orcid.org/0000-0002-9816-0293
Estela Marta Doffo Winocur Universidade Estadual de Campinas https://orcid.org/0000-0001-5191-4476
Adriana de Jesus Soares Universidade Estadual de Campinas https://orcid.org/0000-0002-8078-1606

DOI:

https://doi.org/10.14393/BJ-v37n0a2021-56141

Keywords:

Apical foramen, Instrumentation, Enlargement, Root canal filling.

Abstract

The aim of this study was to evaluate apical transportation and apical root canal sealing after root canal filling in human teeth prepared with MTwo® Rotary System with and without apical foramen enlargement. Twenty mandibular premolars were divided into two groups (n=10). Group 1 had root canals prepared 1mm beyond the apical foramen. Group 2 had root canals prepared 1mm below the root canal length. After chemo-mechanical preparation, samples were submitted to scanning electronic microscopy. Apical foramen images had 75x magnification at standardized positions, allowing measurements from the apical foramen area before and after root canal preparation, and after root canal filling. Apical foramen shape and apical transportation, as well as its level of circumferential filling after root canal preparation were accessed using the Image Subtraction System. Scanning electronic microscopy analysis demonstrated that samples of Group 1 showed larger foraminal diameter than samples of Group 2 (p<0.05). Apical foramen transportation was statistically different between Groups 1 and 2 (p=0.0108). Furthermore, the apical foramen sealing also differed statistically between groups 1 and 2 (p=0.0007) and 100% of samples of Group 1 showed apical root canal sealing. Apical root canal sealing was more effective when the root canal was prepared with apical foramen enlargement, even when the apical transportation was detected.

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References

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