Effect analysis on clinical application of one-visit root canal therapy on molar teeth

Objective To explore the method and the effects of one-visit root canal therapy on molar teeth through a retrospective study among 76 cases received molar teeth' root canal therapy.Methods Molar teeth with chronic pulpitis and periapical periodontitis(non-sinus type or sinus type) were randomized into two groups,ie,experiment group(one-visit root canal therapy) and contrast group(multiple-visit root canal therapy).The patients in the experiment group were drained for 10 minutes after root canal preparation,then received root canal disinfection for 30 minutes followed by filling canals by gutta percha point with cold side pressure.The patients were reviewed three days,one week and one year after therapy.In the contrast group,the patients received multiple-visit root canal therapy.The effects were compared between the two groups.Results Challenge signs appeared in 7 cases in experiment group against 6 in the contrast.The one-year effective rates in experiment group and contrast group were 89.9﹪ and 92.9﹪ respectively.There was no significant difference between two groups(P0.05).Conclusion One-visit root canal therapy can be implemented to treat chronic pulpitis and periapical periodontitis if the doctor has a good understanding of the anatomy of molar teeth' root canal.There is no significant difference in the occurrence of challenge sings and one year efficacy between one-visit and multiple-visit.The long-dated efficacy is waiting for the more studies.