title: Comparative analysis of physicochemical properties of root perforation sealer materials.
abstract: OBJECTIVE
  This study evaluated the solubility, dimensional alteration, pH, electrical conductivity, and radiopacity of root perforation sealer materials.
  
  
  METHODS
  For the pH test, the samples were immersed in distilled water for different periods of time. Then, the samples were retained in plastic recipients, and the electrical conductivity of the solution was measured. The solubility, dimensional alteration, and radiopacity properties were evaluated according to Specification No. 57 of the American National Standards Institute/American Dental Association (ANSI/ADA). Statistical analyses were carried out using analysis of variance (ANOVA) and Tukey's test at a significance level of 5%. When the sample distribution was not normal, a nonparametric ANOVA was performed with a Kruskal-Wallis test (α = 0.05).
  
  
  RESULTS
  The results showed that white structural Portland cement (PC) had the highest solubility, while mineral trioxide aggregate (MTA)-based cements, ProRoot MTA (Dentsply-Tulsa Dental) and MTA BIO (Ângelus Ind. Prod.), had the lowest values. MTA BIO showed the lowest dimensional alteration values and white PC presented the highest values. No differences among the tested materials were observed in the the pH and electrical conductivity analyses. Only the MTA-based cements met the ANSI/ADA recommendations regarding radiopacity, overcoming the three steps of the aluminum step wedge.
  
  
  CONCLUSIONS
  On the basis of these results, we concluded that the values of solubility and dimensional alteration of the materials were in accordance with the ANSI/ADA specifications. PCs did not fulfill the ANSI/ADA requirements regarding radiopacity. No differences were observed among the materials with respect to the pH and electrical conductivity analyses.
authors.affiliation: Departament of Endodontics, Faculty of Dentistry, University of Cuiabá, Cuiaba, Mato grosso, Brazil.
authors.forename: Maura Cristiane Gonçales Orçati
authors.initials: MC
authors.lastname: Dorileo
authors.affiliation: Departament of Endodontics, Faculty of Dentistry, University of Cuiabá, Cuiaba, Mato grosso, Brazil.
authors.forename: Fábio Luis Miranda
authors.initials: FL
authors.lastname: Pedro
authors.affiliation: Departament of Prosthodontic Dentistry, Faculty of Dentistry, CEUMA University, São Luis, Maranhão, Brazil.
authors.forename: Matheus Coelho
authors.initials: MC
authors.lastname: Bandeca
authors.affiliation: Departament of Endodontics, Faculty of Dentistry, University of Cuiabá, Cuiaba, Mato grosso, Brazil.
authors.forename: Orlando Aguirre
authors.initials: OA
authors.lastname: Guedes
authors.affiliation: Departament of Chemistry, Institute of Exact Sciences and Earth, Mato Grosso Federal University, Cuiabá, Mato Grosso, Brazil.
authors.forename: Ricardo Dalla
authors.initials: RD
authors.lastname: Villa
authors.affiliation: Departament of Endodontics, Faculty of Dentistry, University of Cuiabá, Cuiaba, Mato grosso, Brazil.
authors.forename: Alvaro Henrique
authors.initials: AH
authors.lastname: Borges
keywords: Endodontics; Furcation defects; Root canal filling materials
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