![]() Some states, such as pathologies related to vertical fractures, cervical resorption, or perforation, affect both systems, directly. Īt these crossroads, irritants (bacteria and their by-products) may attempt to cross and interact with the other anatomic entity involving it in the pathologic process. These may be present at any height of the root, from the apex to the cemento emamel unction (CEJ) as well as the furcation areas in multi-rooted teeth. Anatomically, the only sites at which the vital pulp can be in contact with the PDL are the apical foramen, or foramina, as well as the outlets of the lateral canals. Under these conditions, no interaction is to be expected between the healthy pulp and the surrounding PDL. These two entities are normally separated by dentin, covered by layers of practically impermeable cementum. The periodontal ligament and the root canal system have close developmental and anatomic relationship so that pathologic processes arising in one may affect the other. Periodontal lesion, Endo-Perio Lesions, root canals, endodontic lesion Introduction An electronic PubMed bibliographical index search was carried out using the preliminary key words followed by article selection according to relevance and importance to the topic. This review is based on the English language literature regarding endo-perio lesions. This literature review summarizes most of our knowledge regarding the anatomical aspect of the perio-endo lesion. A better understanding of the development of a perio-endo lesion can help the general practitioner arrive at a more accurate diagnosis and a better treatment plan. Objective: To help the practitioner arrive at a more accurate diagnosis by reviewing all the anatomical and pathological ways of communication between the RCS and the PDL. These systems may affect each other in several ways which may result in a perio-endo lesion. This review summarizes the ways of communication between the root canal system (RCS) and the periodontal ligament (PDL). ![]() ![]() ![]() The periodontal ligament and the root canal system are closely interlinked. ![]()
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