ABSTRACT
Objective To explore the microbial infection and the related factors in patients with periodontal-endodontic combined lesions(PECL),in order to provide reference for the control and prevention of clinical infec-tion.Methods 36 patients with PECL were selected as observation group;36 cases(36 teeth)were selected as con-trol group.Samples of periodontal pockets and root canal samples were collected to detect the infection of microorgan-ism,and the risk factor of the occurrence of PECL was analyzed.Results 23 teeth in the observation group were detected microorganisms,the detection rate was 63.9%,such as Neisseria,Corynebacterium,actinomyces,Campy-lobacter,Fusobacterium were the main microorganisms,including 23 teeth for periodontal pockets were detected in the microorganism,the detection rate was 100.0%,and 14 cases of root canal detection of microbial,the detection rate was 60.9%;7 teeth in the control group was found in microbes,and the detection rate was 19.4%,the detection rate in the observation group was significantly higher than that of control group(χ2 =14.63,P <0.05).The tooth week source PECL dependent variable y multi factors logistic regression analysis showed that Neisseria,Corynebacterium, actinomyces,Fusobacterium infection were periodontal source PECL risk factors(OR =1.462,1.379,1.467,1.665, all P <0.05).Conclusion The occurrence of periodontal source PECL is closely related to the microbial infection, and the clinical treatment can improve the cure rate.