title: Comparison of microleakage with three different thicknesses of mineral trioxide aggregate as root-end filling material.
abstract: The aim of this study was to compare the microleakage at three different thicknesses of mineral trioxide aggregate (MTA) as a root-end filling material. Ninety extracted human maxillary incisor teeth were selected and the root canals of the teeth were cleaned, shaped and obturated with gutta percha and AH-plus sealer. Teeth were randomly divided into 3 groups each containing 20 experimental samples, and 5 positive and 5 negative controls. In the first, second and third experimental groups, cavities of 1 mm, 2 mm and 3 mm in depth, respectively, were prepared and filled with MTA. Leakage was determined by the dye penetration method using India ink, and a stereomicroscope at x16 magnifications and 0.1 mm accuracy. The microleakage in the 3-mm and 2-mm root-end cavities was less than at 1 mm depth, but analysis of variance revealed no significant differences among the three different thicknesses.
authors.affiliation: Department of Endodontics, Tabriz Dental School, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Saeed
authors.initials: S
authors.lastname: Rahimi
authors.forename: Shahriar
authors.initials: S
authors.lastname: Shahi
authors.forename: Mehrdad
authors.initials: M
authors.lastname: Lotfi
authors.forename: Hamid R
authors.initials: HR
authors.lastname: Yavari
authors.forename: Mohamad E
authors.initials: ME
authors.lastname: Charehjoo
mesh_terms: D017607:Aluminum Compounds / Q000008:administration & dosage*; D017610:Calcium Compounds / Q000008:administration & dosage*; D003763:Dental Leakage; D004338:Drug Combinations; D006801:Humans; D007180:Incisor; D010087:Oxides / Q000008:administration & dosage*; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials; D017640:Silicates / Q000008:administration & dosage*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate