The emergence and course of inflammatory periodontal diseases, primarily due to the influence of microbial dental plaque. Plaque is a soft, structured, attached to the surface of the tooth plaque, which is impossible to wash off with water. At 1 mg of plaque (the mass of the light water) contains approximately 10k bacteria. The term Materia alba (white patches) denote the deposits on the teeth and gums, which in contrast to the raid, washed with water. The white plaque represents a whitish mass of unstructured, consisting of bacteria, leukocytes, and the remnants of the epithelium.

On the surface of the tooth has cuticle and pellicula. Cuticle, or the reduced enamel epithelium of the body, disappears soon after the eruption. This formation is detected, mainly in the subsurface layer of enamel, but in places reaches the surface in the form of a microscopic film or reaches amelodentinal connection. Pellicula (acquired cuticle) - unstructured education, in whose creation the glycoproteins of saliva. It appears after the eruption of teeth and tightly fixed on its surface.