title: pH, calcium ion release, and setting time of an experimental mineral trioxide aggregate-based root canal sealer.
abstract: BACKGROUND
  An experimental mineral trioxide aggregate sealer (MTAS) has been developed for use as a root canal sealer. The aim of this study was to evaluate the setting time, pH, and calcium ion release of MTAS compared with white Portland cement (CPB-40; Votorantin Cimentos, Camargo Correa SA, Pedro Leopoldo, MG, Brazil), white MTA Angelus (MTA; Angelus, Londrina, PR, Brazil), and AH Plus (Dentsply DeTrey, Konstanz, Germany).
  
  
  METHODS
  For the evaluation of setting time, each material was analyzed using Gilmore-type needles. Polyethylene tubes with the materials were immersed in distilled water for the measurement of pH (digital pH meter) and calcium release (atomic absorption spectrophotometry). The evaluations were performed at 3, 6, 12, 24, and 48 hours and 7, 14, and 28 days. Data were analyzed by analysis of variance and the Tukey test at 5% significance level.
  
  
  RESULTS
  MTAS showed higher calcium release at all experimental periods, a greater increase in pH up to 48 hours and the longest setting time.
  
  
  CONCLUSIONS
  MTAS presented favorable properties for its indication as a root canal sealer.
authors.affiliation: Department of Restorative Dentistry, Araraquara Dental School, UNESP, University Estadual Paulista, Araraquara, São Paulo, Brazil.
authors.forename: Santiago
authors.initials: S
authors.lastname: Massi
authors.forename: Mário
authors.initials: M
authors.lastname: Tanomaru-Filho
authors.forename: Guilherme Ferreira
authors.initials: GF
authors.lastname: Silva
authors.forename: Marco Antonio Hungaro
authors.initials: MA
authors.lastname: Duarte
authors.forename: Larissa Tercilia
authors.initials: LT
authors.lastname: Grizzo
authors.forename: Marília Afonso Rabelo
authors.initials: MA
authors.lastname: Buzalaf
authors.forename: Juliane Maria
authors.initials: JM
authors.lastname: Guerreiro-Tanomaru
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D002122:Calcium Chloride / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D003738:Dental Cements / Q000737:chemistry; D004338:Drug Combinations; D004853:Epoxy Resins / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D013054:Spectrophotometry, Atomic; D013696:Temperature; D013997:Time Factors; D015040:Zirconium / Q000737:chemistry
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; D004853:Epoxy Resins; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C534916:epoxy resin-based root canal sealer; C086631:mineral trioxide aggregate; D015040:Zirconium; D002122:Calcium Chloride; C028541:zirconium oxide; D002118:Calcium