Doutorado em Ciências da Saúde (FM)
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Navegando Doutorado em Ciências da Saúde (FM) por Assunto "1.Polpa dentária 2.Pulpite dentária 3.Cárie 4.Células inflamatórias 5.Células imunológica"
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Item Aspectos Inflamatórios e Imunológicos de Pulpites Dentárias Humanas(Universidade Federal de Goiás, 2009-09-18) BRUNO, Kely Firmino; ESTRELA, Carlos; http://lattes.cnpq.br/3611967334176683Immune and inflammatory cells may contribute to host defense and microenvironmental changes during the pathogenesis of dental pulpitis. This study evaluated the microscopic characteristics and densities (per mm2) of tryptase+ mast cells, CD4+ T helper lymphocytes, CD45RO+ memory T lymphocytes, foxp3+ T regulatory lymphocytes, CD20+ B lymphocytes, CD68+ macrophages, and CD31+ blood vessels in human dental pulpitis (n = 38). Methods: Tryptase, CD4, CD45RO, foxp3, CD20, CD68, and CD31 expressions were analyzed using immunohistochemistry; other microscopic features, such as intensity of inflammatory infiltrate and collagen deposition, were evaluated after staining with hematoxylin and eosin. Results: Two microscopic patterns of dental pulpitis were found: group 1 (G1) (n = 15) showed intense inflammatory infiltrate and mild collagen deposition; conversely, group 2 (G2) (n = 23) showed scarce inflammatory infiltrate and intense collagen deposition. The numbers of CD68+ and CD20+ cells and the density of blood vessels were higher in G1 than in G2. However, there were no differences in CD4+ and CD45RO+ cell densities between groups. When present, mast cells were equally distributed in G1 and G2, whereas foxp3+ cells were detected in 58.82% and 14.28% of the samples of G1 and G2. Conclusions: Immune and inflammatory cell infiltration have different patterns in human dental pulpitis, which might reflect distinct microscopic characteristics and particular local defense capabilities.