Analysis of clinical efficacy of treating periodontal-endodontic combined lesions in 140 cases

Objective To analyse the clinical efficacy of treating periodontal-endodontic combined lesions in 140 cases.Methods 160 teeth with periodontal-endodontic combined lesions in 140 patients were selected and divided into three groups randomly.Group A was treated with combined method of root canal therapy and periodontal therapy at the same time.Group B was treated with periodontal therapy 2～3 months after the root canal therapy.Group C was treated with root canal therapy.Results The clinical treatment effects of group A were superior to those of group B,but there was no statistical significance one year later(P0.05).The clinical treatment effects of group A and group B were superior to those of group C obviously,and there was statistical significance(P0.05).Conclusions Combined method of thorough root canal therapy and seasonable periodontal therapy is effective to treat periodontal-endodontic combined lesions,which can increase teeth' survival rate.