Evaluation of pH and calcium ion release of a dual-cure bisphenol A ethoxylate dimethacrylate/mineral trioxide aggregate-based root-end filling material.
BACKGROUND
The incorporation of light-curable resins has been proposed for mineral trioxide aggregate (MTA) to improve its properties and reduce its setting time. The aim of the present study was to assess the pH and calcium ion release of an experimental bisphenol A ethoxylate dimethacrylate/MTA-based root-end filling material (E-MTA) in comparison with white MTA Angelus (Angelus, Londrina, PR, Brazil) (W-MTA) and to evaluate the influence of the addition of calcium chloride (CaCl2) on these properties.


METHODS
Polyethylene tubes filled with the materials were immersed in deionized water for the measurement of pH (digital pH meter) and calcium release (atomic absorption spectrophotometry). The evaluations were performed at 3 and 24 hours and 7, 15, and 30 days. Data were measured using 2-way repeated measures of variance followed by the Holm-Sidak method (P < .05).


RESULTS
All materials presented a reduction in the pH and released calcium ions during the 30 days of the study. E-MTA showed a significantly lower calcium ion release capacity when compared with W-MTA (P < .05). The calcium release of E-MTA + 5% CaCl2 was similar to W-MTA (P > .05).


CONCLUSIONS
The monomer bisphenol A ethoxylate dimethacrylate added to MTA formed a material with a lower capacity of calcium release than W-MTA despite maintaining a similar pH. However, the addition of CaCl2 improved the calcium release of this material.
Dental School, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
Giane da Silva
Gda S
Linhares
Maximiliano Sérgio
MS
Cenci
César Blaas
CB
Knabach
Camila Mizette
CM
Oliz
Mariana Antunes
MA
Vieira
Anderson Schwingel
AS
Ribeiro
César Henrique
CH
Zanchi
Rogério Castilho
RC
Jacinto
D017607:Aluminum Compounds / Q000737:chemistry*; D001729:Bismuth / Q000737:chemistry; D002118:Calcium / Q000737:chemistry*; D002122:Calcium Chloride / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D003738:Dental Cements / Q000737:chemistry; D004338:Drug Combinations; D006801:Humans; D006813:Humidity; D006863:Hydrogen-Ion Concentration; D008689:Methacrylates / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D058105:Polymerization; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D055116:Self-Curing of Dental Resins / Q000379:methods; D017640:Silicates / Q000737:chemistry*; D013054:Spectrophotometry, Atomic; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D017607:Aluminum Compounds; D017610:Calcium Compounds; D003738:Dental Cements; D004338:Drug Combinations; C475480:MTA-Angelus; D008689:Methacrylates; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; D014867:Water; C041979:2,2-bis-(4-(2-methacryloxyethoxy)phenyl)propane; C074277:ethoxylated bis-phenol A dimethacrylate; D002122:Calcium Chloride; D002118:Calcium; D001729:Bismuth
Bisphenol A ethoxylate dimethacrylate; calcium release; mineral trioxide aggregate; root-end surgery