title: In vitro comparative study of the microbial leakage of one-step, thermafil and lateral condensation techniques.
abstract: OBJECTIVE
  To compare the apical seal of lateral condensation technique, thermafil and one-step by using this model.
  
  
  METHODS
  A two-chamber bacterial microleakage model using E. faecalis as microbial marker was used for evaluation of the leakage. Bacterial penetration was monitored over a 60-day period. Leakage was recorded when turbidity was observed in the lower chamber.
  
  
  RESULTS
  After comparing the bacterial penetration values, total penetration was observed 45% in lateral condensation technique, 80% in thermafil and 75% in one-step. There was no significant difference between groups after 60 days; however, the microleakage in lateral condensation group was seen later than one-step and thermafil.
  
  
  CONCLUSIONS
  Thermafil and one-step obturator can be advocated as effective obturation techniques for achieving predictable success in endodontic therapy.
  
  
  CONCLUSIONS
  Thermafil and one-step obturator are suitable devices for obturation.
authors.affiliation: Department of Endodontics, Azad University of Medical Sciences, Tehran, Iran.
authors.forename: Hengameh
authors.initials: H
authors.lastname: Bakhtiar
authors.forename: Neda
authors.initials: N
authors.lastname: Heidari
authors.forename: Peiman
authors.initials: P
authors.lastname: Mehrvarzfar
authors.forename: Kiarash
authors.initials: K
authors.lastname: Ghazvini
authors.forename: Mehdi
authors.initials: M
authors.lastname: Habibi
authors.forename: Hamid
authors.initials: H
authors.lastname: Jafarzadeh
authors.forename: Nafiseh
authors.initials: N
authors.lastname: Dastmalchi
mesh_terms: D001840:Dental Bonding; D003763:Dental Leakage / Q000382:microbiology*; D003786:Dental Pulp Cavity / Q000382:microbiology; D004492:Edetic Acid / Q000627:therapeutic use; D013293:Enterococcus faecalis / Q000302:isolation & purification; D006171:Gutta-Percha / Q000737:chemistry*; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000295:instrumentation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D013696:Temperature; D013997:Time Factors; D019227:Tooth Apex / Q000382:microbiology
chemical_list: D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D006171:Gutta-Percha; D004492:Edetic Acid; D012973:Sodium Hypochlorite