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Warning Over Zinc Poisoning in Denture Creams

A report published in the March/April 2011 edition of the American “General Dentistry” journal advises dentists against exposing patients to too excessive amounts of zinc by ensuring that their dentures fit correctly.

Zinc is a common metal used in dental products, and administered in the recommended quantities should not present a problem. However, too much zinc can result in a copper deficiency, neurological problems and anaemia.

The report gives as an example a tube of denture adhesive – such as Flexigrip – which should last denture wearers up to twelve weeks. Some patients, who have ill-fitting dentures, will use much more than is recommended to keep their dentures in place.

Lawsuits have been filed in America against the manufacturers of denture creams which contain zinc for not adequately warning about the risks associated with the product. GlaxoSmithKline has reportedly settled some lawsuits regarding the zinc toxicity of their denture adhesive, Poligrip.