title: Sealing ability of MTA and radiopaque Portland cement with or without calcium chloride for root-end filling.
abstract: The aim of this study was to evaluate the influence of calcium chloride (CaCl(2)) on the sealing ability of three Mineral Trioxide Aggregate (MTA) cements, ProRoot MTA, MTA-Angelus, and radiopaque White Portland cement (WPC), for retrograde root filling. Seventy roots of extracted single-rooted teeth were instrumented and obturated. After sectioning the samples at 2 mm from the apex, they received one layer of Araldite and two coats of nail enamel, except for the apical dentinal surface submitted to apicectomy. Standardized retrograde cavities were prepared, filled with one of the materials, and immersed in 0.2% Rhodamine B solution for 72 hours. Dye leakage was analyzed on a light microscope with ocular micrometer. Kruskal-Wallis and Miller tests were used to compare groups arranged in increasing order of leakage, according to mean rank of scores: WPC+CaCl(2), MTA-Angelus+CaCl(2), ProRoot MTA+CaCl(2), MTA-Angelus, ProRoot MTA, and WPC. CaCl(2) improved the sealing ability of all three MTA cements.
authors.affiliation: Department of Endodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil. edubortoluzzi@yahoo.com.br
authors.forename: Eduardo Antunes
authors.initials: EA
authors.lastname: Bortoluzzi
authors.forename: Norberto Juárez
authors.initials: NJ
authors.lastname: Broon
authors.forename: Clovis Monteiro
authors.initials: CM
authors.lastname: Bramante
authors.forename: Roberto Brandão
authors.initials: RB
authors.lastname: Garcia
authors.forename: Ivaldo Gomes
authors.initials: IG
authors.lastname: de Moraes
authors.forename: Norberti
authors.initials: N
authors.lastname: Bernardineli
mesh_terms: D017607:Aluminum Compounds; D001641:Bicuspid; D001729:Bismuth; D002122:Calcium Chloride / Q000494:pharmacology*; D017610:Calcium Compounds; D003738:Dental Cements; D003763:Dental Leakage; D004338:Drug Combinations; D006801:Humans; D008422:Materials Testing; D010087:Oxides; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials; D017640:Silicates; D018709:Statistics, Nonparametric
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; C475480:MTA-Angelus; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C472247:accelerated Portland cement; C086631:mineral trioxide aggregate; D002122:Calcium Chloride; D001729:Bismuth