[Comparison of three kinds of root canal disinfection medications in treatment of chronic apical periodontitis with fistula].

PURPOSE:To evaluate Vitapex paste, calcium hydroxide paste and paper points of povidone iodine as medications of root canal disinfection and their abilities of pain control in treatment of chronic apical periodontitis with fistula. METHODS:A total of 90 patients of chronic apical periodontitis with fistula were randomly assigned to 3 groups,30 patients in each group. After regular root canal preparation, group 1 was given Vitapex paste, group 2 was given calcium hydroxide paste, and group 3 was given paper points of povidone iodine as medications of root canal disinfection. Visual analogue scales of pain were given to the patients and method of filling the scale was also introduced to them at the same time. The scales were taken back one week later. Both the data of the scales and the effects of root canal disinfection were recorded and analyzed. All statistical analysis was performed using SPSS 17.0 software package. RESULTS:The effect of root canal disinfection had no significant difference among the three groups. Group 1 achieved better result of pain control than the others. CONCLUSIONS:The three root canal disinfection medications are effective in treatment of chronic apical periodontitis with fistula. Vitapex paste is better for controlling the pain after root canal preparation than culcium hydroxide and paper points of povidone iodine.