title: Apical microleakage of primary teeth root canal filling materials.
abstract: OBJECTIVE
  The objective of this study was to evaluate in vitro apical microleakage of root canal filling materials for primary teeth.
  
  
  METHODS
  Fifty extracted primary anterior teeth were distributed into 6 groups: 4 experimental groups; 1 negative control group; and 1 positive control group. Zinc oxide and eugenol (ZOE), Kri paste, calcium hydroxide (Ca(OH)(2)), and Vitapex were inserted into the canal using a lentulo spiral mounted in a slow-speed handpiece. All teeth were then subjected to a dye leakage test using 2% methylene blue as the tracer.
  
  
  RESULTS
  The highest dye penetration was recorded for teeth filled with ZOE, with mean values of 9.01+/-1.23 mm. Vitapex showed the lowest dye penetration, with mean values of 4.02+/-1.79 mm. Comparison between groups showed significant difference when the Vitapex and Kri paste groups were compared to the ZOE group (P<.0001). Also, a significant difference between the Vitapex and Ca(OH)2 group (P=.014) was detected. The result showed no difference between Vitapex and Kri paste (P=.658) nor between Kri paste and Ca(OH)(2) (P=.185).
  
  
  CONCLUSIONS
  All the resorbable root canal filling materials used in primary teeth showed apical leakage. The highest apical leakage was recorded for ZOE, while Vitapex showed minimum dye leakage.
authors.affiliation: Riyadh Medical Complex, Riyadh Dental Center, Ministry of Health, Riyadh, Saudi Arabia.
authors.forename: Omar A
authors.initials: OA
authors.lastname: Bawazir
authors.forename: Fouad S
authors.initials: FS
authors.lastname: Salama
mesh_terms: D000704:Analysis of Variance; D004396:Coloring Agents; D003481:Cuspid; D003763:Dental Leakage / Q000175:diagnosis; D006801:Humans; D007180:Incisor; D008751:Methylene Blue; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation; D018709:Statistics, Nonparametric; D019227:Tooth Apex / Q000503:physiopathology*; D014094:Tooth, Deciduous
chemical_list: D004396:Coloring Agents; D012387:Root Canal Filling Materials; D008751:Methylene Blue