RF and HA, with significant difference between the two materials except for RF and HA. Conclusion: VITAPEX has the best root canal sealing ability than other three materials whose order is ZOE, RFand HA.

• 结论：通过微渗漏值的比较，说明VITAPEX封闭根尖孔能力显著优于其它3种材料，其后依次为ZOE、RF、HA。