Potential and polarization measurements in vivo of oral galvanism

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Abstract
Glavanic currents within the oral cavity may have harmful effects on biological tissues. Patients [16] 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 P probe were measured vs. 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. Electrochemical measurements showed that conditions for oral galvanism existed within individuals of the patient group and within the control group. A 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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