title: Sealing ability of a mineral trioxide aggregate for repair of lateral root perforations.
abstract: Amalgam, IRM, and a mineral trioxide aggregate were tested for repair of experimentally created root perforations. Fifty sound, extracted mandibular and maxillary molars were used in this study. A perforation was created on the mesial root surface at about a 45-degree angle to the long axis of each tooth. The tooth was then placed into a saline-soaked "Oasis" to simulate a clinical condition. After placing the repair materials into the perforations, the teeth were kept for 4 wk in the Oasis model. The perforation sites were then stained with methylene blue for 48 h, sectioned, and examined under a dissecting microscope. The results showed that the mineral trioxide aggregate had significantly less leakage than IRM or amalgam (p < 0.05). The mineral trioxide aggregate also showed the least overfilling tendency while IRM showed the least underfilling tendency.
authors.affiliation: Yonsei University, Seoul, Korea.
authors.forename: S J
authors.initials: SJ
authors.lastname: Lee
authors.forename: M
authors.initials: M
authors.lastname: Monsef
authors.forename: M
authors.initials: M
authors.lastname: Torabinejad
mesh_terms: D017607:Aluminum Compounds; D000704:Analysis of Variance; D017610:Calcium Compounds; D003723:Dental Amalgam; D003738:Dental Cements; D003763:Dental Leakage / Q000517:prevention & control*; D004338:Drug Combinations; D006801:Humans; D008768:Methylmethacrylates; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; D014092:Tooth Root / Q000293:injuries*; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D008768:Methylmethacrylates; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; D015035:Zinc Oxide-Eugenol Cement; C086631:mineral trioxide aggregate; C031667:IRM cement; D003723:Dental Amalgam