title: Lack of correlation between tubular dentine cement penetration, adhesiveness and leakage in roots filled with gutta percha and an endodontic cement based on epoxy amine resin.
abstract: OBJECTIVE
  To analyze possible correlations among tubular dentine cement penetration, adhesiveness and apical leakage in fillings performed with gutta percha and an endodontic cement based on epoxy amine resin.
  
  
  METHODS
  Sixty similar, extracted human mandibular central incisors were irrigated, instrumented and filled following the same protocol. First, apical leakage was quantified by fluid filtration tests. Then, these same specimens were sectioned for analysis of tubular dentine cement penetration and the middle thirds were submitted to push-out tests to analyze the adhesiveness of the fillings.
  
  
  RESULTS
  In brief, the means and standard deviations with a confidence interval of 95% were as follows: tubular dentine cement penetration (8.875±4.540), adhesiveness (4.441±2.683) and apical leakage (0.318±0.215). The data were confronted using the Pearson's test (P>0.05), and it was possible to prove that there was no correlation between (1) tubular dentine cement penetration and apical leakage (r2: 0.08276), (2) tubular dentine cement penetration and adhesiveness (r2: -0.2412) and (3) adhesiveness and apical leakage (r2: 0.1340).
  
  
  CONCLUSIONS
  After analysis of these data, it could be observed that there exists no correlation among the variables analyzed in this study.
authors.affiliation: Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Machado
authors.affiliation: Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil.
authors.forename: Ulisses Xavier da
authors.initials: UX
authors.lastname: Silva Neto
authors.affiliation: Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil.
authors.forename: Everdan
authors.initials: E
authors.lastname: Carneiro
authors.affiliation: Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil.
authors.forename: Luiz Fernando
authors.initials: LF
authors.lastname: Fariniuk
authors.affiliation: Pontifical Catholic University of Paraná, Department of Endodontics, CuritibaPR, Brazil, Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, PR, Brazil.
authors.forename: Vânia Portela Ditzel
authors.initials: VP
authors.lastname: Westphalen
authors.affiliation: University of Manitoba, School of Dentistry, Restorative Dentistry, Winnipeg, Canada, School of Dentistry, Restorative Dentistry, University of Manitoba, Winnipeg, Canada.
authors.forename: Rodrigo Sanches
authors.initials: RS
authors.lastname: Cunha
mesh_terms: D000268:Adhesiveness; D016001:Confidence Intervals; D001840:Dental Bonding / Q000379:methods; D003763:Dental Leakage; D003786:Dental Pulp Cavity / Q000187:drug effects; D003804:Dentin / Q000187:drug effects*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D004853:Epoxy Resins / Q000737:chemistry*; D006171:Gutta-Percha / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012390:Root Canal Therapy / Q000379:methods*; D013997:Time Factors
chemical_list: D017220:Dentin-Bonding Agents; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha