title: Evaluation of physico-chemical properties of Portland cements and MTA.
abstract: The purpose of this study was to evaluate the hydrogenionic potential and electrical conductivity of Portland cements and MTA, as well as the amount of arsenic and calcium released from these materials. In Teflon molds, samples of each material were agitated and added to plastic flasks containing distilled water for 3, 24, 72 and 168 h. The results were analyzed with a Kruskal-Wallis non-parametric test for global comparisons and a Dunn-Tukey test for pairwise comparisons. The results revealed no significant differences in the pH of the materials (p > 0.05). The electrical conductivity of the cements were not statistically different (p > 0.05). White non-structural cement and MTA BIO released the largest amount of calcium ions into solution (p < 0.05), while arsenic release was insignificant in all of the materials (p > 0.05). The results indicated that the physico-chemical properties of Portland cements and MTA were similar. Furthermore, all materials produced an alkaline environment and can be considered safe for clinical use because arsenic was not released. The electrical conductivity and the amount of calcium ions released into solution increased over time.
authors.affiliation: School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil.
authors.forename: Jorge Luis
authors.initials: JL
authors.lastname: Gonçalves
authors.forename: Raqueli
authors.initials: R
authors.lastname: Viapiana
authors.forename: Carlos Eduardo Saraiva
authors.initials: CE
authors.lastname: Miranda
authors.forename: Alvaro Henrique
authors.initials: AH
authors.lastname: Borges
authors.forename: Antônio Miranda da
authors.initials: AM
authors.lastname: Cruz Filho
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D001151:Arsenic / Q000032:analysis*; D002118:Calcium / Q000032:analysis*; D017610:Calcium Compounds / Q000737:chemistry*; D003738:Dental Cements / Q000737:chemistry*; D004338:Drug Combinations; D004553:Electric Conductivity; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D013053:Spectrophotometry; D013997:Time Factors
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D001151:Arsenic; D002118:Calcium