title: Efficacy of ultrasonic vibration in warm gutta-percha vertical compaction.
abstract: OBJECTIVE
  Vertical compaction of warm gutta-percha is a methodology to seal root canals and it might be associated with ultrasonic vibration. The aim of this paper was to determine whether vertical compaction of warm gutta-percha used with ultrasonic vibrations performs better compared to the traditional one.
  
  
  METHODS
  Twenty-four single-rooted teeth were endodontically treated and randomly divided into two groups: in the first group (G1), teeth were filled using vertical compaction, while in the other (G2), vertical compaction was used with ultrasonic vibration. A microleakage test was performed after 24 h and 30 days from root canal sealing.
  
  
  RESULTS
  After 24 hours, microleakage was similar in both groups (0.013 µL/min; SD 0.008); after 30 days, it was 0.006 µL/min (SD 0.004) in G1 and 0.004 µL/min (SD 0.003) in G2 (P>0.05).
  
  
  CONCLUSIONS
  Under these experimental conditions, ultrasonic vibration used with vertical compaction produced a similar level of sealing as the traditional method.
authors.affiliation: Department of Medicine, Surgery and Dentistry, University of Milan, Milan, Italy. d.rececconi@tin.it
authors.forename: D
authors.initials: D
authors.lastname: Re Cecconi
authors.forename: M
authors.initials: M
authors.lastname: Grassi
authors.forename: D
authors.initials: D
authors.lastname: Tortini
authors.forename: E
authors.initials: E
authors.lastname: Brambilla
authors.forename: M M
authors.initials: MM
authors.lastname: Gagliani
mesh_terms: D006171:Gutta-Percha; D006801:Humans; D066298:In Vitro Techniques; D012389:Root Canal Obturation / Q000379:methods*; D014465:Ultrasonics; D014732:Vibration
chemical_list: D006171:Gutta-Percha