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Clinicopathological and ultrastructural characterization of periapical actinomycosis

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Clinicopathological and ultrastructural characterization of periapical actinomycosis

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dc.contributor.author Silva, Wagner-Gomes es
dc.contributor.author Pereira, Débora-Lima es
dc.contributor.author Fregnani, Eduardo Rodrigues es
dc.contributor.author Almeida, Oslei Paes de es
dc.contributor.author Armada, Luciana es
dc.contributor.author Pires, Fábio-Ramôa es
dc.date.accessioned 2021-01-14T10:11:36Z
dc.date.available 2021-01-14T10:11:36Z
dc.date.issued 2020 es
dc.identifier.citation Silva, Wagner-Gomes ; Pereira, Débora-Lima ; Fregnani, Eduardo Rodrigues ; Almeida, Oslei Paes de ; Armada, Luciana ; Pires, Fábio-Ramôa. Clinicopathological and ultrastructural characterization of periapical actinomycosis. En: Medicina oral, patología oral y cirugía bucal. Ed. inglesa, 25 1 2020: 7- es
dc.identifier.uri https://hdl.handle.net/10550/77077
dc.description.abstract The aim of the present study was to analyze the clinicopathological and the ultrastructural features of periapical actinomycosis (PA) cases. Data from the files of an oral pathology laboratory were retrieved and the findings of histopathological analysis were evaluated. Hematoxylin?eosin (HE), a modified Brown & Brenn, and Grocott stains as well as ultrastructural analysis using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) were utilized. Six cases were obtained, 4 females and 2 males, with a mean age of 34 year-old. Two cases were symptomatic, lower teeth and the anterior region were more commonly affected, and all cases were characterized by periapical radiolucencies. All cases presented sulfur granules with a ray-fungus or club-shaped pattern of the Splendore-Hoeppli phenomenon in HE-stained sections, with filamentous gram-positive bacteria aggregates highlighted by the modified Brown & Brenn stain. SEM analysis revealed abundant packed rod-like and filamentous bacteria associated with an extracellular amorphous material. EDX analysis showed predominant picks of calcium and sulfur in actinomycotic colonies. Our findings suggest that PA manifests either clinically and radiologically as a non-specific and heterogeneous condition and that the actinomycotic colonies consist in a calcium- and sulfur-rich matrix. Furthermore, the results highlight the importance of submitting periapical specimens after surgical removal to histopathological analysis. es
dc.title Clinicopathological and ultrastructural characterization of periapical actinomycosis es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/medoral.23247 es
dc.type.hasVersion VoR es_ES

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