title: Influence of calcium hydroxide debris on the quality of endodontic apical seal.
abstract: OBJECTIVE
  The aim of the study was to study investigate the influence of calcium hydroxide used as intermediate medication on the quality of apical seal of a silicon based and an experimental resin based endodontic sealer.
  
  
  METHODS
  Eighty endodontic canals were prepared and divided in four groups. Calcium hydroxide was applied in groups 2 and 4. After 7 days, medication was removed and canals were filled with gutta-percha and RoekoSeal Automix (groups 1 and 2) or Scotchbond MP+C&B cement B (groups 3 and 4). Specimens were placed into India ink, cleared and analyzed under a stereomicroscope to investigate apical leakage.
  
  
  RESULTS
  Specimens that received calcium hydroxide medication showed leakage means higher than the corresponding untreated ones (i.e. group 1< group 2 and group 3< group 4; P<0.001).
  
  
  CONCLUSIONS
  Calcium hydroxide interferes with the sealing ability of silicon based sealer, since it frequently remains entrapped within the endodontic space even after careful removal procedures.
authors: Clinic University Department of Biomedicine, University of Trieste, Trieste, Italy.
authors: L
authors: L
authors: Contardo
authors: M
authors: M
authors: De Luca
authors: L
authors: L
authors: Bevilacqua
authors: L
authors: L
authors: Breschi
authors: R
authors: R
authors: Di Lenarda
mesh_terms: D002126:Calcium Hydroxide / Q000494:pharmacology*; D006801:Humans; D012387:Root Canal Filling Materials
chemical_list: D012387:Root Canal Filling Materials; D002126:Calcium Hydroxide