[Comparison of the apical sealability of two canal obturation methods.].

PURPOSE: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. CONCLUSION:The vertical condensation to gutta-percha at crown third after canal obturation with LC could reduce the apical microleakage.