Avaliação de cimentos e técnicas de obturação no preenchimento de istmos radiculares usando um novo software de tomografia computadorizada de feixe cônico
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2022-05-25
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Universidade Federal de Goiás
Resumo
Aim: To evaluate the sealing ability of root isthmuses using different sealers and root canal
filling techniques using a new Cone Beam Computed Tomography software (e-Vol DX).
Methodology: 120 lower molars extracted from patients with indication for extraction were
used. The teeth were divided into 6 groups according to the endodontic sealer and filling
technique: G1: AH Plus® + lateral condensation technique (n=20), G2: AH Plus® + Tagger's
hybrid technique (n=20), G3: AH Plus® + single cone technique (n=20), G4: BioRoot RCS +
lateral condensation technique (n=20), G5: BioRoot RCS® + Tagger hybrid technique (n=20)
and G7: BioRoot RCS® + single cone technique (n=20). The teeth were instrumented using
the Wave One Gold® reciprocating system, irrigation performed with 2.5% sodium
hypochlorite and EDTA (using ultrasonic passive irrigation) and then all canals were filled
according to the division of the groups. Sealing evaluation was performed using scores. Nonparametric statistics were used for its analysis and the description was performed by median,
minimum and maximum. Mann Whitney test was used to compare the scores between the
sealers and Kruskal-Wallis test followed by Dunn-Bonferroni post hoc tests between the
obturation techniques and groups. To compare scores obtained with and without Blooming
Artifact Reduction (BAR) filter of e-Vol DX software, Wilcoxon test was used. Results: Results
showed there was a significant difference in sealing lower molar isthmus using endodontic
sealers studied in apical third with BAR (p=0.016), with scores being higher for AH Plus®.
There were differences in sealing of lower molar isthmus using different filling techniques in
middle and apical thirds. For middle third without BAR, difference was between single cone
and Tagger's hybrid techniques (p=0.011) as well as for apical third without BAR (p<0.001).
For middle third with BAR, difference was between single cone technique and lateral
condensation (p=0.043) and Tagger hybrid (p=0.009) techniques. For apical third with BAR,
the difference was between Tagger's hybrid technique and single cone (p<0.001) and lateral
condensation (p=0.041) techniques. When comparing the sealing scores using different filling
techniques and types of sealer, there were differences between G2 and G3 (p=0.015) and G2
and G6 (p=0.024) in apical third without BAR. Using BAR tool, statistical differences were as
follows: in cervical third between G2 and G6 (p=0.023); in middle third, between G2 and G6
(p=0.072); in apical third, G6 had lower scores than G1 (p=0.046), G2 (p=0.002) and G5
(p=0.011) and G4 had lower scores than G2 (p=0.023). When comparing isthmus sealing
scores with and without using BAR tool, there were significant differences, with higher values
without using the tool, in all thirds. It is concluded that, when evaluating sealing ability of root
isthmus using different sealers and filling techniques with e-Vol DX software, the best
combination was the use of AH Plus and Tagger's hybrid technique. Using BAR filter of the eVol DX software in CBCT images showed more empty spaces in filling mass due to the
reduction of white expansion, making tomographic image more reliable.
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Citação
MORAIS, A. L. G. Avaliação de cimentos e técnicas de obturação no preenchimento de istmos radiculares usando um novo software de tomografia computadorizada de feixe cônico. 2022. 76 f. Tese (Doutorado em Odontologia) - Universidade Federal de Goiás, Goiânia, 2022.