title: Evaluation of Apical Micro-leakage of Different Endodontic Sealers in the Presence and Absence of Moisture.
abstract: Background and aims. With availability of hydrophilic sealers, drying of the canals before endodontic obturation is still a matter of debate. The aim of this study was to compare the apical micro-leakage of AH26, Excite DSC, MTA Fillapex, and ZOE sealers in dry and moist root canals. Materials and methods. This experimental study was performed on 90 extracted maxillary central incisors. Rotary files were used for preparation of the canals. Root canals were filled with a single gutta percha cone, using one of the four sealers, under dry and moist root canal conditions (10 teeth in each group). Orifices were sealed with glue wax and all root surfaces were covered with nail polish except the positive control group. After ten days in 100% humidity, teeth were placed in methylene blue, and then were cut in longitudinal axis. Blue color permeability was measured by stereomicroscope in micrometers. Data were analyzed by t-test, ANOVA and Scheffe post hoc test using SPSS V.18 software at P < 0.05. Results. Mean apical micro-leakage was significantly lower in the dry groups (P < 0.001). Minimum and maximum micro-leakage was seen in AH26 and ZOE, respectively. MTA Fillapex did not exhibit a significant difference in apical micro-leakage between dry and moist conditions (P > 0.05). Apical micro-leakage was significantly higher in the Excite DSC groups (P < 0.001). Conclusion. AH26 provided the least apical micro-leakage under dry conditions while ZOE had the highest micro-leakage under moist conditions. MTA Fillapex provided acceptable apical seal regardless of moisture.
authors.affiliation: Dental Materials Research Center, Babol University of Medical Sciences, Babol, Iran ; Associate Professor, Department of Endodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Ehsani
authors.affiliation: Under-graduate student, Student Research Center, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran.
authors.forename: Atena
authors.initials: A
authors.lastname: Dehghani
authors.affiliation: Dental Materials Research Center, Babol University of Medical Sciences, Babol, Iran ; Assistant Professor, Department of Oral & Maxillofacial Radiology, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran.
authors.forename: Farida
authors.initials: F
authors.lastname: Abesi
authors.affiliation: Assistant Professor, Department of Social Medicine and Health, Faculty of Medicine, Babol University of Medical Science, Babol, Iran.
authors.forename: Soraya
authors.initials: S
authors.lastname: Khafri
authors.affiliation: Dentist, Private Practice, Babol, Iran.
authors.forename: Sara
authors.initials: S
authors.lastname: Ghadiri Dehkordi
keywords: Micro-leakage; moisture; root canal therapy; sealer