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Ex vivo evaluation of four final irrigation protocols on the removal of hard‐tissue debris from the mesial root canal system of mandibular first molars
Author(s) -
Leoni G. B.,
Versiani M. A.,
SilvaSousa Y. T.,
Bruniera J. F. B.,
Pécora J. D.,
SousaNeto M. D.
Publication year - 2017
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/iej.12630
Subject(s) - debris , molar , root canal , irrigation , dentistry , orthodontics , hard tissue , reciprocating motion , mathematics , medicine , biology , computer science , geology , agronomy , oceanography , bearing (navigation) , artificial intelligence
Aim To evaluate the efficacy of four final irrigation protocols on the reduction of hard‐tissue debris accumulated within the mesial root canal system of mandibular first molars using micro‐ CT analysis. Methodology Forty mesial roots of mandibular molars with a single and continuous isthmus connecting the mesiobuccal and mesiolingual canals (Vertucci's Type I configuration) were selected and scanned at a resolution of 8.6 μm. Canals were enlarged sequentially using WaveOne Small and Primary instruments activated in reciprocating motion without intracanal irrigation to allow debris to accumulate within the mesial root canal system. Then, specimens were anatomically matched and distributed into four groups ( n = 10), according to the final irrigation protocol: apical positive pressure ( APP ), passive ultrasonic irrigation ( PUI ), Self‐adjusting File ( SAF ) and XP ‐endo Finisher ( XPF ). The final irrigation procedures were performed over 2 min using a total of 5.5 mL of 2.5% Na OC l per canal. Reconstructed data sets were coregistered, and the mean percentage reduction of accumulated hard‐tissue debris after the final irrigation procedures was compared statistically between groups using the anova post hoc Tukey test with a significance level set at 5%. Results Reduction of accumulated hard‐tissue debris was observed in all groups after the final irrigation protocol. Overall, PUI and XPF groups had higher mean percentage reductions of accumulated hard‐tissue debris (94.1% and 89.7%, respectively) than APP and SAF groups (45.7% and 41.3%, respectively) ( P < 0.05). No significant differences were found when comparing the results of PUI and XPF groups ( P > 0.05) or APP and SAF groups ( P > 0.05). Conclusions The PUI technique and XP ‐endo Finisher instrument were associated with significantly lower levels of AHTD compared with conventional irrigation and the modified SAF system protocol in mesial root canals of mandibular molars.