Oral lichenoid lesions (OLL) and mercury in amalgam
fillings
L. Wong and
S. Freeman
84 patients
with oral lichenoid lesions (OLL) were seen in the
contact dermatitis clinic. All these patients had
reticulate, lacy, plaque-like or erosive lichenoid
changes adjacent to amalgam fillings. Patch testing to
metallic mercury, 0.1% thimerosal, 1% ammoniated
mercury, 0.1% mercuric chloride, and in some cases 0.05%
phenylmercuric nitrate and amalgam discs was undertaken.
33 (39%) patients had positive patch test findings.
30/33 patch test positive patients had replacement of
their amalgam fillings, with 28 (87%) patients
experiencing improvement of symptoms and signs within
3 months. This confirms that mercury allergy is a factor
in the pathogenesis of OLL in some cases. In cases where
patch test negative patients improve with amalgam
replacement, mercury may be acting as an irritant in the
pathogenesis of OLL.
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Authors:
L. Wong
S.
Freeman
Key words:
amalgam
fillings
contact
allergy
leukoplakia
mercury
oral
lichen planus
oral lichenoid lesions
Accepted for publication 29 August
2002
Affiliations
Skin and Cancer
Foundation, Darlinghurst NSW, Australia
Correspondence
Address: S. Freeman Skin and Cancer Foundation 277 Bourke St Darlinghurst NSW 2010 Australia
To cite
this article Wong, L. & Freeman, S.
Oral lichenoid lesions (OLL) and mercury in amalgam
fillings. Contact Dermatitis48 (2), 74-79. doi: 10.1034/
j.1600-0536.2003.480204.x
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