Effect of dexamethasone on prevention of endodontic interappointment pain

Objective: To evaluate the influence of dexamethasone on endodontic interappointment pain(EIP).Methods: One hundred and sixty-four teeth were randomly divided into two groups.The test group were injected 5 mg dexamethasone at apical region of pulp necrosis teeth after root canal preparation,then the incidence of EIP was observed and compared with that of the control group.Results: The incidence of EIP in the test group was 7.32%,while it was 21.95% in the control group,the difference was significant(P<0.05).The incidence of EIP of non-fistular posterier tecth increased significantly(P<0.01).Conclusions: Local injection of dexametnasone can efficiently reduce the incidence of EIP and alleviate the pain.