Evaluation of Tension and Intensity of Electrogalvanical Currents between Dental Alloys and Silver Amalgam

It is a well-known fact, that the presence of metals, distant from each other in electrogalvanical sequence, causes the occurrence of electrical tensions in the oral cavity environment and, as a result, there is current flow between them. Tensions and galvanical currents may cause not only discomfort for the patient, metallic taste, oral local changes on mucous membrane, but they may also have negative influence on immunological, internal or gynecological diseases. The object of this study was the definition of dimension of tension and intensity of electrogalvanical currents, which are induced by the presence of different dental alloys and silver amalgams in artificial saliva with different pH-value. For the study artificial saliva was used, prepared according to the method of Fusayama in modification of Holland. The examined alloys were the products of the Kulzer- concern: • Heraenium NA: chrom-nicelic alloy; • Heraenium NF and Heraenium P: cobaltchrom- molybdenic alloys; • and silver amalgams (polished and unpolished) from the SDI concern. The above mentioned alloys and silver amalgams were placed in pairs in artificial saliva solutions with different pH-values (3-11) using the each with each rule. The tension and intensity of the examined electrodes were evaluated with the help of aDigitalvoltmeter G1002.500. The results of the study proved that the highest tension and intensity of currents were found for chrom nickelic and cobalt-chrom-molybdenic alloys in the presence of silver amalgams: polished and unpolished, in artificial saliva solution with extremely high and/or low pH-value.