title: In vitro evaluation of matched-taper single-cone obturation with a fluid filtration method.
abstract: OBJECTIVE
  Widespread use of rotary nickel-titanium systems has caused manufacturers to produce gutta-percha cones that match the taper of the canals prepared with these systems. Obturations with these cones may provide 3-dimensional obturation of the root canal in less time. The aim of this study was to use a fluid filtration method to compare the apical sealing ability of matched-taper single-cone, Thermafil and lateral condensation obturations.
  
  
  METHODS
  Sixty-six extracted human lower premolar teeth were instrumented to size F3 with ProTaper instruments. The teeth were divided into 3 groups and obturated with matched-taper single-cone, Thermafil and lateral condensation techniques. AH Plus was used as a sealer. Six teeth were used as positive and negative controls. A fluid filtration system was used to evaluate the apical seal. Measurements were made at 2-minute intervals for 8 minutes and the average of these values was recorded. One-way analysis of variance test was used for statistical analysis.
  
  
  RESULTS
  Mean leakage values for the lateral condensation, single-cone and Thermafil groups were 0.49 +/- 0.37 microL min(-1), 0.39 +/- 0.24 microL min(-1) and 0.44 +/- 0.25 microL min(-1), respectively. The difference between the groups was not statistically significant (p > 0.05).
  
  
  CONCLUSIONS
  The apical sealing ability of matched-taper single-cone obturation was comparable with that of lateral condensation and Thermafil techniques.
authors.affiliation: Department of conservative dentistry and endodontics, Faculty of dentistry, Ondokuz Mayis University, Samsun, Turkey.
authors.forename: Ugur
authors.initials: U
authors.lastname: Inan
authors.forename: Cumhur
authors.initials: C
authors.lastname: Aydin
authors.forename: Yasar Meric
authors.initials: YM
authors.lastname: Tunca
authors.forename: Feridun
authors.initials: F
authors.lastname: Basak
mesh_terms: D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification*; D018772:Dental Marginal Adaptation; D003786:Dental Pulp Cavity / Q000033:anatomy & histology; D004853:Epoxy Resins / Q000737:chemistry; D004867:Equipment Design; D005374:Filtration / Q000379:methods; D006171:Gutta-Percha / Q000737:chemistry*; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D019227:Tooth Apex / Q000033:anatomy & histology
chemical_list: D004853:Epoxy Resins; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha