Clinical Effect of Calcium Hydroxide Iodoform Paste Used in Root Canal Disinfection on Chronic Periapical Abscess with Sinuses

Objective: To observe the clinical effect of calcium hydroxide iodoform paste used in root canal disinfection on periapical abscess with sinuses.Methods: Choosing 50 patients,each of them has 2 teeth of chronic periapical abscess with sinuses on the same dentition,The 2 teeth of each patient were divided into a test group and a control group,implementing the root canal therapy at the same time with autogenous ectopic contrast.The test group was disinfected using calcium hydroxide iodoform paste in root canals,while calcium hydroxide was used for the control group,and clinical observation and contrast on root canal disinfection were continued between these 2 groups.Results: 74%(37/50) in the test group could be started root canal filling after 1 block therapy,but 52%(26/50) in the control group could be started root canal filling after 1 block therapy.Statistical differences(P0.05) existed between the rates of root canal filling after 1 block therapy.The average block therapy for the test group was 1.30 but for the control group was 1.56.Conclusion: calcium hydroxide iodoform paste used in root canal disinfection can decrease times of the block therapy on chronic periapical abscess with sinuses.