title: In-vitro evaluation of microleakage of an orthograde apical plug of mineral trioxide aggregate in permanent teeth with simulated immature apices.
abstract: This in vitro study evaluated the seal created by varying depths of mineral trioxide aggregate (MTA) plugs placed in an orthograde fashion in five groups of 10 teeth. One group received a 2 mm thick orthograde apical plug of MTA, the second group a 5 mm apical MTA plug, and the third group a 2 mm apical MTA plug with a second 2 mm increment, 24 h later. The remaining portion of the canal in these groups was left unfilled. Group four received a 2 mm MTA plug that set for 24 h and the canal was then back-filled with gutta-percha and eugenol based sealer. Group five was a positive control without an MTA plug. The apical seal was tested using a bacterial leakage model of Actinomyces viscosus. Results showed a statistically significant difference in only the 5 mm apical plug, which completely prevented bacterial leakage.
authors.affiliation: Department of Periodontics and Endodontics, State University of New York at Buffalo, School of Dental Medicine, Buffalo, NY 14214, USA.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Al-Kahtani
authors.forename: Sandra
authors.initials: S
authors.lastname: Shostad
authors.forename: Robert
authors.initials: R
authors.lastname: Schifferle
authors.forename: Satish
authors.initials: S
authors.lastname: Bhambhani
mesh_terms: D016924:Actinomyces viscosus; D017607:Aluminum Compounds; D017610:Calcium Compounds; D003763:Dental Leakage / Q000382:microbiology / Q000517:prevention & control*; D004338:Drug Combinations; D006801:Humans; D010087:Oxides; D011897:Random Allocation; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*; D017640:Silicates; D019227:Tooth Apex / Q000502:physiology
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate