Abstract
Introduction
The obturation quality of the mandibular molar mesial canals and isthmuses with two
thermoplastic techniques, ultrasonic vertical condensation (UVC) and continuous wave
of condensation (CWC), was evaluated using computed microtomography (μCT).
Methods
Thirty-six human mandibular molars had been previously scanned and analyzed using
μCT for mesial roots with morphologically similar isthmuses for this study. Coronal
access and confirmation of foraminal patency were performed, and the actual length
of the teeth was established using a clinical microscope (40X magnification). The
canals were prepared using ProTaper Gold instruments up to #F3, with 2.5% sodium hypochlorite
as the irrigant solution, followed by a passive ultrasonic irrigation protocol. The
specimens were randomly divided into the UVC and CWC groups based on the obturation
technique to be used. Obturation was performed with #F3 gutta-percha cones cemented
using AH Plus Jet sealer. The μCT scans were performed after 15 days, and the images
were evaluated by a calibrated examiner blinded to the experimental groups to determine
the filling rate of the entire canal area, including the main canal and isthmus. Student's
t-test was used for statistical analysis; P values ≤0.05 were considered significant.
Results
Neither of the thermoplastic obturation techniques achieved complete filling of the
canals (86.3% for UVC and 91.4% for CWC), with a statistically significant difference
between them (P = .029).
Conclusions:
Under the conditions of the study, it can be concluded that none of the techniques
completely filled the canal/isthmus of the mandibular molars; however, the CWC exhibited
better performance.
Key Words
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Article info
Publication history
Published online: February 23, 2023
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2023 American Association of Endodontists.
