Abstract
An in vitro experiment was performed to demonstrate whether a denture adhesive containing Karaya gum could decalcify dental enamel. Decalcification was estimated by means of microindentation hardness tests. To enhance visibility the specimens examined were gold plated before the indentations were measured. The degree of decalcification was expressed as an ‘equivalent zero-hardness layer’. Results showed that decalcification does occur and that the use of denture adhesives containing Karaya gum will probably worsen any predisposition to caries. The use of such materials should be discouraged for patients with any natural teeth.
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