[Periodontal-endodontal interactions].

The periodontal ligament and the root canals system have a common developmental, anatomical and functional link. Those include the apical foramina, accessory canals and dental tubules whereas the pathological pathways perforation and vertical fractures. Similar microflora- bacteria, virus and yeast also have documented at the both nisus. This article describes the influence of the periodontium on the pulp and vise versa. The pulp is highly survivable and posses high ability to sustain the disease and treatment and periodontal disease and periodontal treatment exhibit small effect on the pulp. However, pulp necrosis is a risk factor to damage the periodontal ligament of the teeth.