Which statement best describes galvanism in a dental context?

Which statement best describes galvanism in a dental context?

• A. Electric currents produced when two dissimilar metals contact in saliva
• B. A form of thermal pain
• C. A type of caries
• D. Enamel erosion due to acid

Answer: (A)

Galvanism in dentistry is the electric current that occurs when two dissimilar metals are in contact in the mouth and both are surrounded by saliva. Saliva acts as an electrolyte, while the different metals have distinct electrochemical potentials. When they touch, a galvanic cell forms and electrons flow from the more active metal to the nobler metal, producing a current. This can cause a metallic taste, a tingling sensation, or a brief shock if you bite on metal restorations with different metals present. This phenomenon is electrical in origin, not due to heat, bacterial decay, or acid dissolving enamel, which is why it’s distinct from those other conditions.

Galvanism in dentistry is the electric current that occurs when two dissimilar metals are in contact in the mouth and both are surrounded by saliva. Saliva acts as an electrolyte, while the different metals have distinct electrochemical potentials. When they touch, a galvanic cell forms and electrons flow from the more active metal to the nobler metal, producing a current. This can cause a metallic taste, a tingling sensation, or a brief shock if you bite on metal restorations with different metals present. This phenomenon is electrical in origin, not due to heat, bacterial decay, or acid dissolving enamel, which is why it’s distinct from those other conditions.