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abstract— Galvanic currents within the oral cavity may have harmful effects on biological tissues. In the present work 16 patients with different kinds of oral and other discomfort and pain which they attributed to oral galvanism were investigated. The potential and polarization of each metal restoration within reach of a platinum probe were measured versus a reference electrode. A recording of these measured values permits a calculation of the currents which may pass between the teeth. A control group of patients with no subjective symptoms of galvanism in the oral cavity was also investigated. The results of the electrochemical measurements showed that conditions for oral galvanism existed within the individuals of the patient group as well as within the control group. One remarkable observation was that the metallic restorations often consisted of different electrically isolated areas with different electrochemical properties. This and other factors influencing oral galvanism are discussed.

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Potentials of and currents between dental metallic restorations. Scand. J. Dent. Res. 1982: 90: 404-408. Abstract -115 persons were studied from a body of patients referred to the Faculty of Odontology, University of Umea, for investigation regariding any occurrence of oral galvanism. Potential and polarization of metallic restoradons .and dentures were recorded using a method .and equipment previously described. Data regarding distribution of potential ranges with respect to number of patients and type of alloy are presented. The distribution of calculated intraoral currents in relation to number and type of metallic contacts is stated. Relevant parameters, for the study of oral galvanic (bimetallic) ceils are discussed.

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