Objective:To investigate the clinical efficacy of disposable root canal in the treatment of chronic periapical periodontitis.Methods:80 patients with chronic periapical periodontitis were randomly divided into two groups.Patients in the observation group were treated with disposable root canal,while the control group were given multiple root canal therapy.Results:After 1 year of treatment,the effective rate of the observation group was significantly higher than that of the control group(P<0.05).Conclusion:D...