title: Lack of correlation between ex vivo apical dye penetration and presence of apical radiolucencies.
abstract: OBJECTIVE
  The aim of this study was to determine if there is a significant correlation between the in vivo presence of periapical radiolucency and ex vivo apical dye penetration on the same human teeth.
  
  
  METHODS
  Eighty-four endodontically filled teeth that were scheduled for extraction were classified into 2 groups according to the presence or absence of a periapical radiolucency and further divided into 2 subgroups according to the quality of the root canal filling. After extraction, the apical filling was evaluated by a dye penetration method.
  
  
  RESULTS
  The dye extraction evaluation showed no correlation between apical dye penetration and the presence of a periapical radiolucency (not significant), but a statistically significant correlation with the quality of the root canal filling (P = .03).
  
  
  CONCLUSIONS
  The results of the dye penetration study were correlated to the quality of the root canal filling but had no predictive value for the development of periapical radiolucency.
authors.affiliation: Department of Restorative Denistry-Endodontics, Faculté d'Odontologie, Université de la Méditerranée.
authors.forename: Guy
authors.initials: G
authors.lastname: Susini
authors.forename: Ludovic
authors.initials: L
authors.lastname: Pommel
authors.forename: Imad
authors.initials: I
authors.lastname: About
authors.forename: Jean
authors.initials: J
authors.lastname: Camps
mesh_terms: D004396:Coloring Agents; D003763:Dental Leakage / Q000175:diagnosis / Q000209:etiology*; D019232:Dental Restoration Failure; D006801:Humans; D008751:Methylene Blue; D010483:Periapical Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D011237:Predictive Value of Tests; D011859:Radiography; D012389:Root Canal Obturation / Q000009:adverse effects; D018709:Statistics, Nonparametric; D019227:Tooth Apex; D019553:Tooth, Nonvital
chemical_list: D004396:Coloring Agents; D008751:Methylene Blue