Oral Lichenoid Lesion Manifesting as Desquamative Gingivitis: Unlikely Association? Case Report

Lívia Maria Lopes de Oliveira1, Luiz Henrique Carvalho Batista2, Alexandrino Pereira dos Santos Neto1, Luciano Barreto Silva1, Renata Cimões1, Jair Carneiro Leão1, Maria Leticia Cintra3, Camila Maria Béder Ribeiro4, *
1 Department of Prosthesis and maxillofacial surgery, Faculty of Dentistry, Federal University of Pernambuco Recife, Brazil
2 Department of Periodontology, Dental School, Cesmac University Center, Maceió, Brazil
3 Medical Sciences College, University of Campinas – FCM UNICAMP, Campinas, Brazil
4 Department of Pathology, Faculty of Dentistry, Cesmac University Center, Cônego Machado, 918, Farol CEP: 57051-160, Maceió, Alagoas, Brazil

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© 2018 Lopes de Oliveira et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Pathology, Faculty of Dentistry, Cesmac University Center, Cônego Machado, 918, Farol CEP: 57051-160, Maceió, Alagoas, Brazil; Tel: +558232155000; E-mail:



The aim of this report is to present a clinical case of oral lichenoid lesions associated with amalgam restorations with the presence of desquamative gingivitis for a nine months follow up period.

Case Report:

The histopathologic characteristics and direct immunofluorescence were compatible with Oral Lichenoid Lesion (LLO). Diagnosis was based on a synthesis of all available information, including medical history, clinical examination, histopathology and the results of specific tests, such as the patch test, which confirmed allergy to thimerosal, an organic compound of mercury.


The replacement of amalgam restorations has brought improvements to the instrument, as evidenced by the disappearance of desquamative gingivitis, aspect erythematosus and erosive lesions. The fading does not complete the same, however, indicates the need to continue has been under continuous observation, the patient, having in view the possibility of the existence of an underlying lichen planus.

Keywords : Dental amalgam, Gingivitis diseases , Delayed hypersensitivity, Lichenoid lesions, Oral lichen planus, Heterogeneous clinical manifestations.