title: Longitudinal sealing ability of mineral trioxide aggregate as a root-end filling material.
abstract: This study evaluated the ability of mineral trioxide aggregate (MTA) to seal the root end effectively. Seventy-six single-rooted, extracted human teeth were cleaned and shaped using a step-back technique. After root-end resection and ultrasonic preparation, 72 root sections were randomly allocated to three groups and filled with dental amalgam and cavity liner, Super-EBA, or MTA. Microleakage was assessed at 24 h, 72 h, 2 wk, 4 wk, 8 wk, and 12 wk, using a fluid filtration measurement system. MTA demonstrated excellent sealing ability throughout 12 wk of fluid immersion, comparable with that observed for Super-EBA. Microleakage in the MTA group, as well as the Super-EBA group, was significantly less (p < 0.05) than in the amalgam group at 24 h, 72 h, and 2 wk. At the subsequent periods, there were no significant differences among the three materials. In this study, MTA was determined to be superior to amalgam, and comparable with Super-EBA in preventing microleakage when used as a root-end filling.
authors.affiliation: Department of Endodontics, Wilford Hall Medical Center, Lackland Air Force Base, TX, USA.
authors.forename: C F
authors.initials: CF
authors.lastname: Bates
authors.forename: D L
authors.initials: DL
authors.lastname: Carnes
authors.forename: C E
authors.initials: CE
authors.lastname: del Rio
mesh_terms: D017607:Aluminum Compounds; D001641:Bicuspid; D017610:Calcium Compounds; D003723:Dental Amalgam; D003763:Dental Leakage / Q000517:prevention & control*; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D005069:Evaluation Studies as Topic; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D010087:Oxides; D011897:Random Allocation; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials; D017640:Silicates; D018709:Statistics, Nonparametric
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D003723:Dental Amalgam; C084074:Super EBA