title: Antibacterial efficiency of passive ultrasonic versus sonic irrigation. Ultrasonic root canal irrigation.
abstract: OBJECTIVE
  To compare the antibacterial effect of the passive ultrasonic to passive sonic irrigation with a 5.25% NaOCI solution.
  
  
  METHODS
  Sixty human teeth were used. The crowns were removed and the roots were instrumented prior to sterilization and incubation with Enterococcus faecalis. Five mL of 5.25% NaOCI were used during a 3 min final rinsing with: syringe irrigation (n = 20), passive ultrasonic irrigation with the Irrisafe (n = 20) and passive sonic irrigation with the Endo Activator (n = 20). A sterile file was used to remove dentine shavings at the apex and placed in BHI. After 72 h, this infusion was used to inoculate blood agar plates. The presence or absence of Enterococcus faecalis colonies was determined and statistically analyzed.
  
  
  RESULTS
  No statistically significant difference was found among the 3 groups. None of the irrigation regimen permitted to obtain 100% of bacteria free teeth.
  
  
  CONCLUSIONS
  The passive agitation of the irrigation solution did not increase its antibacterial efficiency. Longer irrigation times may be required.
authors.affiliation: UMR 6578, UFR Médecine Nord, Marseille, France.
authors.forename: D
authors.initials: D
authors.lastname: Tardivo
authors.forename: L
authors.initials: L
authors.lastname: Pommel
authors.forename: B
authors.initials: B
authors.lastname: La Scola
authors.forename: I
authors.initials: I
authors.lastname: About
authors.forename: J
authors.initials: J
authors.lastname: Camps
mesh_terms: D016009:Chi-Square Distribution; D003786:Dental Pulp Cavity / Q000382:microbiology*; D013293:Enterococcus faecalis / Q000187:drug effects; D006801:Humans; D012388:Root Canal Irrigants / Q000008:administration & dosage*; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods*; D012973:Sodium Hypochlorite / Q000008:administration & dosage*; D013010:Sonication; D013594:Syringes; D007507:Therapeutic Irrigation / Q000295:instrumentation / Q000379:methods; D014465:Ultrasonics; D014732:Vibration
chemical_list: D012388:Root Canal Irrigants; D012973:Sodium Hypochlorite