Resumo

BRITO JUNIOR, Manoel; SOARES, Janir Alves  e  LUZ, Renata Sousa Tatagiba. Chronic periapical lesions: a review of microbiologic aspects by different investigations methods. RGO, Rev. gaúch. odontol. (Online) [online]. 2011, vol.59, suppl.1, pp. 121-125. ISSN 1981-8637.

Starting from the pulp necrosis the pulp cavity becomes progressively colonized by several microorganisms' inhabitants of the oral cavity and interconectives systems. Thus, the teeth with pulp necrosis and radiolucencies periapical areas present countless microbiological morfotypes in the root canal system. Nevertheless, of long date, the survival of the microorganisms in the periapical granuloms has been questioned. In this review it was verified that currently, by culture or molecular methods that the coccus, bacilli and filamentous, gram-negative and positive, predominantly strict anaerobes, identified in the root canal system also are recovered in the periapical lesions. Such microorganisms are also identified for the coloration of Brown and Brenn or for the scanning electronic microscopy in the root apex and in the structure of the lesion, in a frequency that oscillates from 4% to 100%. Structurally, they are organized in an amorphous material, muddy, of polysaccharide composition- the periapical biofilms.

Palavras-chave : Endodontics.; Periapical periodontitis.; Periapical granuloma..