Abstract
ObjectivesThis study aimed to evaluate dentinal tubule penetration and the retreatability of EndoSequence BC Sealer HiFlow (HiFlow), iRoot SP, and AH Plus when using the single-cone (SC) or continuous wave condensation (CWC) technique.Materials and methodsSixty-five single-rooted teeth were instrumented and randomly divided into 5 groups: group 1, AH Plus/CWC; group 2, iRoot SP/CWC; group 3, iRoot SP/SC; group 4, HiFlow/CWC; and group 5, HiFlow/SC. The ability to re-establish patency during endodontic retreatment was recorded, as was the time taken to reach the working length. Dentinal tubule penetration and remaining debris after retreatment were evaluated by confocal microscopy and scanning electron microscopy. Data were analyzed by Kruskal-Wallis test and Dunn’s multiple comparisons test (α = 0.05).ResultsThe HiFlow/CWC and iRoot SP/CWC groups required more time to reach the working length than groups that underwent the SC technique regardless of the sealer used (P < .05). The HiFlow/CWC group showed a significantly higher percentage of sealer penetration area than that of the iRoot SP/SC at 4 mm from the apex (P < .05) and penetrated deeper into dentinal tubules than iRoot SP/SC at both 8-mm and 12-mm levels (P < .05). Moreover, the HiFlow/CWC and HiFlow/SC groups demonstrated less remaining sealer along the canal wall than AH Plus/CWC group at 4-mm level (P < .05).ConclusionsHiFlow/CWC technique showed better performance in dentinal tubule penetration than that of iRoot SP/SC. Both HiFlow and iRoot SP combined with CWC technique groups required more retreatment time than the other groups. Furthermore, using HiFlow with either the CWC or SC technique left less remaining sealer at 4-mm level than using AH Plus with the CWC technique during retreatment.Clinical relevanceWith favorable performance in dentinal tubule penetration and retreatability in endodontic retreatment, the combined use of EndoSequence BC Sealer HiFlow with the recommended continuous wave condensation technique may be a worthwhile choice in root canal treatment.
Highlights
Ruiqi Yang and Jun Tian contributed as first coauthors to this studyThe calcium silicate–based sealer iRoot SP (Innovative BioCreamix Inc., Vancouver, Canada), named Endosequence BC Sealer (Brassiere, Savannah, Georgia, USA), has attracted considerable attentions due to its good biocompatibility, bioactivity, sealing ability, osteoconductive effects [1,2,3], and ability to chemically bond to root canal dentin [4]
Studies on the dentinal tubule penetration and retreatability of iRoot SP have led to inconsistent results since different obturation techniques have been used [14,15,16,17]
It was reported that iRoot SP with the continuous wave condensation (CWC) technique was more effective at filling artificial lateral canals than the SC technique [18]
Summary
The calcium silicate–based sealer iRoot SP (Innovative BioCreamix Inc., Vancouver, Canada), named Endosequence BC Sealer (Brassiere, Savannah, Georgia, USA), has attracted considerable attentions due to its good biocompatibility, bioactivity, sealing ability, osteoconductive effects [1,2,3], and ability to chemically bond to root canal dentin [4]. It is a premixed, injectable material composed of zirconium oxide, calcium silicates, calcium phosphate, calcium hydroxide, filler, and thickening agents [5]. The changes in sealers induced by high temperature may affect the quality of obturation during warm vertical compaction
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
