ABSTRACT
X-ray microanalysis and electron diffraction made on granular metallic deposits of the gingival lamina propria, inducing partial periodontal tattoos, demonstrated that these deposits consisted of crystalline particles combining silver, sulphur and selenium. The role of selenium precipitating of silver and other metals as well as its role in detoxication are discussed.
Subject(s)
Gingival Diseases/metabolism , Pigmentation Disorders/metabolism , Selenium/pharmacology , Chemical Precipitation , Crystallography , Cytoplasmic Granules/ultrastructure , Electron Probe Microanalysis , Gingiva/ultrastructure , Gingival Diseases/pathology , Humans , Pigmentation Disorders/pathology , Selenium/analysis , Silver/analysis , Sulfur/analysisSubject(s)
Composite Resins , Adhesives , Chemical Phenomena , Chemistry, Physical , Composite Resins/analysis , Dental Bonding , Light , Polymers , SilanesSubject(s)
Dental Alloys , Dental Soldering , Chemical Phenomena , Chemistry, Physical , Chromium Alloys , Gold Alloys , NickelSubject(s)
Dental Alloys/analysis , Dental Restoration, Permanent/adverse effects , Gingival Diseases/metabolism , Pigmentation Disorders/metabolism , Dental Alloys/adverse effects , Electrogalvanism, Intraoral , Electron Probe Microanalysis , Gingival Diseases/etiology , Humans , Pigmentation Disorders/etiology , SeleniumSubject(s)
Dental Alloys , Chemical Phenomena , Chemistry, Physical , Corrosion , Dental Amalgam , Gold Alloys , Surface PropertiesABSTRACT
An ultrastructural study of hyperpigmented gingival fragments due to metallic deposits, originating from fixed or amalgam restorations, has shown the presence of metallic particles in the lamina propria either in extracellular locations between collagen fibrils, in basal lamina of gingival keratinocytes, endothelial cells and Schwann cells, or in intracellular locations in macrophages, fibroblasts or endothelial cells.