O desenvolvimento do processo inflamatorio no tecido gengival de rato

AUTOR(ES)
DATA DE PUBLICAÇÃO

1981

RESUMO

The dynamic and composition of the gingival fluid has been studied by various authors, but little is known about the vessels involved in its formation during the junctional epithelium organization. This study describes the gingival inflammatory process, especially the increased vascular permeability, during the development of the gingiva of rats. Rats, 19 to 150 days old, were injected intravenously with colloidal carbon (Pelikan, Günther-Wagner) and killed after 30 minutes. The jaws were removed; fixed in formal in for 48 hours, processed for light microscopy and stained with Hematoxylin and Eosin, Gomori Thrichromic and Silver Impregnation. During tooth eruption, the tissue recovering the inferior molars is infiltrated by leukocytes and vessels labelled with carbon can be observed in this area. The connective tissue subjacent the future junctional epithelium is rich in fibroblasts and fibers, and devoided of inflammatory cells. As the junctional epithelium develops, the ameloblasts turn more flattened and polymorphonuclear cells, as well as vessels with altered permeability, can be observed either in the epithelial and cannective tissues. The interdental papila is initially covered by the keratinized oral epithelium and when the adjacent molars are in contact, the superior portion of the papila is lost, resulting a triangular structure with a non-keratinized epithclium. At this stage, in the papila, inflammatory cells and labelled vessels are observed predominantly in the distal af the first molar. When the junctional enithelial of the distal of the first molar and mesial of the second are morphologically similar, vessels with increased permeability are observed equally in both proximal areas. The results of this work indicate that the inflammatory process and the increased vascular permeability in the rat gingiva, initiate during tooth eruption, and have quantitative and morphological modifications during the organization of the sulcular and junctionai epithelia

ASSUNTO(S)

gengivas rato

ACESSO AO ARTIGO

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