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[Comparison of the apical sealability of two canal obturation methods.]
Hui-zhen Zhang1, Can Zhang, Zong-lai He
1Department of Dentistry, Forth People's Hospital of Hongzhou City, Hangzhou 310002, Zhejiang Province, China. jhhy173501@tom.com
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.