Concomitant endogenous and exogenous etiology for gingival pigmentation
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Updated: Oct 13, 2025

In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA
Published on: May 21, 2015
Beatriz Zamboni Martins Panucci, Tulio Morandin Ferrisse, Andreia Bufalino
1Oral Pathology, Department of Stomatology, Public Oral Health, and Forensic Dentistry, Ribeira~o Preto Dental School (FORP/USP), University of Sa~o Paulo, Riberão Preto, Sa~o Paulo, Brazil. jleon@forp.usp.br.
Abstract:
Oral pigmented lesions can be physiological or pathological, exogenous or endogenous, as well as focal, multifocal, or diffuse. Among them, the oral melanotic macule (OMM) is a small, well-delimited brown-to-black macule, often affecting the lip and gingiva. Amalgam tattoo (AT) is a grey or black area of discoloration on the oral mucosa as a result of entry of dental amalgam into the soft tissues, commonly gingiva and alveolar ridge. Herein, we present a patient with gingival pigmentation with features of both OMM and AT in the same location.
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