title: Sealing ability of mineral trioxide aggregate and super-EBA when used as furcation repair materials: a longitudinal study.
abstract: Immediate sealing of furcation perforations enhances the repair process. The purpose of this study was to longitudinally compare the ability of mineral trioxide aggregate (MTA) and Super-EBA to seal furcation perforations. Fifty-one extracted human maxillary molars were decoronated 3 mm above the CEJ, and the roots were amputated 3 mm below the furcation. A #2 high-speed round bur was used to perforate the center of the furcations. The canals were obturated with gutta-percha, and the root ends were sealed with C&B Metabond. Three experimental groups of 15 teeth each were restored with MTA, Super-EBA, or a combination of MTA in the perforation and a Super-EBA dome on the pulpal floor. Six teeth served as controls. Each tooth was affixed to a fluid filtration device and subjected to a pressure of 20 cm H2O. The integrity of the perforation seal was evaluated initially at 30 min for the Super-EBA and the combination groups and at 4 h for the MTA group. Additional measurements were then made at 24 h, 1 week, and 1 month. The controls behaved as expected. A two-way ANOVA revealed a significant difference (p = 0.01) between materials. Tukey's test isolated the difference to Super EBA as producing a superior seal but only at 24 h. There was no significant effect with time (p = 0.57) or the interaction of the materials with time (p = 0.66). All materials sealed the perforations very well. The maximum leakage of all materials was <0.007 microL min(-1) cm H2O(-1).
authors.affiliation: Department of Endodontics, School of Dentistry, Medical College of Georgia, Augusta 30912-1244, USA.
authors.forename: J Kenneth
authors.initials: JK
authors.lastname: Weldon
authors.forename: David H
authors.initials: DH
authors.lastname: Pashley
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Loushine
authors.forename: R Norman
authors.initials: RN
authors.lastname: Weller
authors.forename: W Frank
authors.initials: WF
authors.lastname: Kimbrough
mesh_terms: D017607:Aluminum Compounds / Q000627:therapeutic use*; D000704:Analysis of Variance; D017610:Calcium Compounds / Q000627:therapeutic use*; D003738:Dental Cements / Q000627:therapeutic use*; D003763:Dental Leakage / Q000517:prevention & control*; D017220:Dentin-Bonding Agents / Q000627:therapeutic use*; D004338:Drug Combinations; D017823:Furcation Defects / Q000628:therapy*; D006801:Humans; D006874:Hydrostatic Pressure; D008137:Longitudinal Studies; D008963:Molar; D010087:Oxides / Q000627:therapeutic use*; D011897:Random Allocation; D017640:Silicates / Q000627:therapeutic use*; D018709:Statistics, Nonparametric; D014092:Tooth Root / Q000293:injuries*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D010087:Oxides; D017640:Silicates; C086631:mineral trioxide aggregate; C084074:Super EBA