title: [Comparison of the apical sealability of two canal obturation methods.].
abstract: OBJECTIVE
  To compare the apical sealability of canal obturation with lateral condensation (LC) and combined LC with vertical condensation (hybrid condensation, HC).
  
  
  METHODS
  79 single canal extracted anterior teeth were instrumented with step-back technique and then randomly divided into three group. Group A was obturated only with LC; group B was obturated with HC. group C was as control group. All teeth were dyed in 1% india ink for 72 hours, then split into two parts longitudinally. The linear length of dye was measured as the result of microleakage.
  
  
  RESULTS
  The linear length of microleakage between group A and group B had significant difference (P<0.01). The microleakage of HC was lower than LC.
  
  
  CONCLUSIONS
  The vertical condensation to gutta-percha at crown third after canal obturation with LC could reduce the apical microleakage.
authors.affiliation: Department of Dentistry, Forth People's Hospital of Hongzhou City, Hangzhou 310002, Zhejiang Province, China. jhhy173501@tom.com
authors.forename: Hui-zhen
authors.initials: HZ
authors.lastname: Zhang
authors.forename: Can
authors.initials: C
authors.lastname: Zhang
authors.forename: Zong-lai
authors.initials: ZL
authors.lastname: He
authors.forename: Qian-jun
authors.initials: QJ
authors.lastname: Wen
mesh_terms: D004396:Coloring Agents; D003763:Dental Leakage; D006171:Gutta-Percha; D006801:Humans; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*
chemical_list: D004396:Coloring Agents; D012387:Root Canal Filling Materials; D006171:Gutta-Percha