Clinical study on the effects of one-visit root canal therapy for primary teeth

Objective: To evaluate the clinical efficacy of one-visit and multi-visit root canal therapy of primary teeth.Methods: 221 primary teeth with chronic endodontitis and chronic apical periodontitis were randomly divided into one-visit group(n=112) and multi-visit group(n=109).The comparisons of the postoperative pain levels at 7 days after therapy and effective rates at 6 months,1 and 2 years after therapy were conducted between the two groups.Results: 7 days after operation the postoperative pain incidence in one-visit group and multi-visit group was 17.0% and 13.8% respectively(P0.05).After 6 months,1 year and 2 years,the effective rates of one-visit group were 88.4%,83.9% and 79.5%,while those of multi-visit group were 91.7%,86.2% and 80.7% respectively(at the same follow-up time,P0.05).Conclusion: One-visit root canal therapy is as effective as multi-visit therapy in the treatment of chronic endodontitis and chronic apical periodontitis of primary.