title: Ability of Three Endodontic Sealers to Fill the Root Canal System in Association with Gutta-Percha.
abstract: BACKGROUND
  The present study compared the ability of the endodontic sealers AH Plus, Pulp Canal Sealer and EndoREZ to fill the root canal system in association with gutta-percha.
  
  
  METHODS
  Ninety mandibular premolars were accessed, prepared and divided into three groups of 30 teeth each, according to the sealer used to fill the canals: AH Plus, Pulp Canal Sealer and EndoREZ. All the teeth were filled using the continuous wave of condensation technique. The specimens were then decalcified, dehydrated, rendered transparent, and analyzed by three independent evaluators with 8x magnification. Chi-squared test (χ(2), p < 0.05) was used to compare the groups in relation to the totally filled, the partially filled and the non filled ramifications. The same test was used to compare the directions of filled ramifications and the number of ramifications among the three thirds of the roots.
  
  
  RESULTS
  EndoREZ filled a significantly higher number of ramifications than AH Plus and Pulp Canal Sealer (χ(2), p < 0.05). All the groups showed higher number of totally filled ramifications than partially filled and unfilled ramifications. The ramifications were more frequently detected in the apical third, followed by medium and coronal thirds, respectively (χ(2), p < 0.05). The ramifications were more frequently detected towards lingual direction (χ(2), p < 0.05).
  
  
  CONCLUSIONS
  EndoREZ presented higher ability to fill the root canal system in association with gutta-percha when compared to AH Plus and Pulp Canal Sealer. The ramifications were more frequently detected in the apical third, running in a lingual direction.
authors.affiliation: Department of Clinical Dentistry, Federal University of Rio de Janeiro, Brazil.
authors.forename: Fabiola
authors.initials: F
authors.lastname: Ormiga
authors.affiliation: Department of Clinical Dentistry, Federal University of Rio de Janeiro, Brazil.
authors.forename: Danielle
authors.initials: D
authors.lastname: Ferreira de Assis
authors.affiliation: Department of Clinical Dentistry, Federal University of Rio de Janeiro, Brazil.
authors.forename: Patricia
authors.initials: P
authors.lastname: de Andrade Risso
keywords: Endodontic sealer; endodontic treatment; ramifications; root canal anatomy; root canal filling; root canal system