title: Sealing ability of MTA, Super EBA, Vitremer and amalgam as root-end filling materials.
abstract: This study evaluated the root-end sealing ability of mineral trioxide aggregate (MTA Angelus), reinforced zinc oxide-eugenol cement (Super EBA), resin-modified glass ionomer (Vitremer) and zinc-free amalgam (GS-80) (control). The root canals of eighty human lower molars were accessed, cleansed, shaped and obturated. Apexes were resected and cavities were prepared. Teeth were divided into 4 groups of 40 cavities, root-end filled with the materials, and immersed in methylene blue for 72 h at 37 degrees C. Roots were then sectioned transversally at each millimeter and evaluated under magnification, observing the dye penetration in each section. Data were evaluated using Kruskal-Wallis test at a 5% level of significance, showing the differences among all materials (p < 0.001). The crescent order of microleakage was MTA < Vitremer < Super EBA < amalgam. Higher leakage levels were observed in the first millimeter sections of amalgam, Vitremer and MTA, when compared with the third millimeter section (p < 0.05).
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas.
authors.forename: Cecília Luiz
authors.initials: CL
authors.lastname: Pereira
authors.forename: Maximiliano Sérgio
authors.initials: MS
authors.lastname: Cenci
authors.forename: Flávio Fernando
authors.initials: FF
authors.lastname: Demarco
mesh_terms: D001729:Bismuth / Q000627:therapeutic use*; D004396:Coloring Agents; D003188:Composite Resins / Q000627:therapeutic use*; D001840:Dental Bonding / Q000592:standards; D003738:Dental Cements / Q000627:therapeutic use*; D003763:Dental Leakage / Q000175:diagnosis / Q000517:prevention & control*; D003786:Dental Pulp Cavity / Q000187:drug effects; D017220:Dentin-Bonding Agents / Q000627:therapeutic use*; D005899:Glass Ionomer Cements / Q000627:therapeutic use*; D006801:Humans; D010087:Oxides / Q000627:therapeutic use*; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D017640:Silicates; D018709:Statistics, Nonparametric
chemical_list: D004396:Coloring Agents; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; C475480:MTA-Angelus; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C084550:Vitremer; C084074:Super EBA; D001729:Bismuth