The connections between periodontal and pulpal tissues are the apical foramina and a multitude of branches connecting the main root canal system with the periodontal ligament, although patent canals leading from the pulp chamber into the furcation only occur in about
10% of all molars). There were no significant difference between infected root canals and adjacent periodontal pockets when classifying microbiota by morphological criteria. Due to great similarity between the microbiota of periodontal and endodontic lesions, the periodontalendodontic lesion might show no unique microbiological profile. The periodontal disease rarely indanger the pulp functioms, unless the disease has reached the terminal phase and involves the main blood supply. True combined lesions occur when an endodontically induced periapical lesion exists at a tooth that is also affected by marginal periodontitis and the two lesions can either merge or exist separately. The prognosis of primary periodontal disease with secondary endodontic involvement and true combined diseases depends primarily upon the severity of the periodontal disease and the response to periodontal treatment.
- ENDODONTIC-PERIODONTAL INTERRELATIONSHIP
- ENDODONTIC-PERIODONTAL LESION