title: Laboratory evaluation of the physicochemical properties of a new root canal sealer based on Copaifera multijuga oil-resin.
abstract: OBJECTIVE
  To compare a new root canal sealer based on Copaifera multijuga oil-resin (Biosealer) using three other established sealers (Sealer 26, Endofill and AH plus) in terms of their physicochemical properties.
  
  
  METHODS
  The study was carried out according to the requirements of Specification Number 57 of the American Dental Association (ADA) and consisted of the following tests: setting time, flow, film thickness, dimensional stability, radiopacity and solubility/disintegration. Data were analysed statistically using anova and Tukey's test for multiple comparisons. The significance level was set at 5% for all analyses.
  
  
  RESULTS
  Sealer 26 and AH Plus had the longest setting time (P < 0.05). All materials presented flow in with the ADA's guidelines. Regarding film thickness, Sealer 26 did not have a satisfactory performance, as it had a higher mean value than the maximum allowed by the ADA (0.05 mm), being significantly different from the other materials (P < 0.05), which had mean values for film thickness in accordance with the ADA's recommendations. Regarding the solubility and disintegration, only Endofill did not meet the ADA's specifications and presented the worst results of all materials (P < 0.05). Sealer 26 presented the greatest dimensional changes and differed significantly from all other sealers (P < 0.05). Biosealer had the lowest radiopacity values and was significantly different from the other sealers (P < 0.05).
  
  
  CONCLUSIONS
  The experimental sealer based on Copaifera multijuga oil-resin presented satisfactory results in the physicochemical tests required by the ADA.
authors.affiliation: School of Dentistry, Federal University of Amazonas-UFAM, Manaus, AM, Brazil. angelab_garrido@yahoo.com.br
authors.forename: A D B
authors.initials: AD
authors.lastname: Garrido
authors.forename: R C C
authors.initials: RC
authors.lastname: Lia
authors.forename: S C
authors.initials: SC
authors.lastname: França
authors.forename: J F
authors.initials: JF
authors.lastname: da Silva
authors.forename: S
authors.initials: S
authors.lastname: Astolfi-Filho
authors.forename: M D
authors.initials: MD
authors.lastname: Sousa-Neto
mesh_terms: D000704:Analysis of Variance; D003287:Contrast Media; D007887:Fabaceae; D008422:Materials Testing; D008517:Phytotherapy; D010938:Plant Oils; D012116:Resins, Plant; D012387:Root Canal Filling Materials / Q000737:chemistry; D012995:Solubility; D018709:Statistics, Nonparametric; D014783:Viscosity
chemical_list: D003287:Contrast Media; D010938:Plant Oils; D012116:Resins, Plant; D012387:Root Canal Filling Materials