Micro ct pilot evaluation of removability of two endodontic sealers

David Colmenar, Tenzin Tamula, Qiang Zhu, Chul Ahn, Carolyn Primus, Takashi Komabayashi

Research output: Contribution to journalArticlepeer-review


Purpose: This study compared the removability of AH Plus and EndoSe-quence BC sealers using in vitro micro-computed tomography. Methods: Ten single-canal, extracted human teeth were cleaned and shaped with ProTaper NEXT rotary files to size X5 (50/0.06) (Dentsply-Sirona). Canals were obturated with a single cone gutta-percha and either AH Plus (Dentsply-Sirona) (Group A) or EndoSequence BC (Brasseler) (Group B). ProTaper Universal Retreatment files (Dentsply-Sirona) were used to remove obturation materials after 90 days at 37oC/100% humid-ity. Each tooth was scanned using micro-computed tomography (SkyScan 1272; Bruker) at an isotropic resolution of 6 μm from which the percent of material removed was calculated. Two-sample t-tests and one-way ANOVA were used for analysis. Results: The percent removal of materials in the coronal third was 92.9% ± 7.3% (Group A) and 93.2% ± 6.1% (Group B). Removal in the middle third was 94.9% ± 8.5% (Group A) and 96.5% ± 6.1% (Group B). Apical third removal was 76.2% ± 27.9% (Group A) and 70.1% ± 30.8% (Group B). No statistically significant differences were determined between the two sealers or among the sectional thirds within each group (P > 0.05). Conclusion: AH Plus and EndoSequence BC sealers exhibit the same removability at all canal levels of 70% to 96%, with better removal coro-nally.

Original languageEnglish (US)
Pages (from-to)306-309
Number of pages4
JournalJournal of Oral Science
Issue number4
StatePublished - 2021


  • Endodontic retreatment
  • Endodontic sealer
  • Epoxy resin
  • Tricalcium silicate
  • X-ray micro-computed tomography

ASJC Scopus subject areas

  • Dentistry(all)


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