The spontaneous production of an electric current resulting from two dissimilar metals in the oral cavity is called:

The spontaneous production of an electric current resulting from two dissimilar metals in the oral cavity is called:

A. Nuclear reaction

B. Galvanic action

C. Precipitation reaction

D. Thermodynamics

The correct answer is B. Galvanic action

Galvanic action, also known as oral galvanism, occurs when two dissimilar metals in the oral cavity contact saliva (an electrolyte), forming a battery-like setup that generates a spontaneous electric current. This can cause symptoms like metallic taste, pain, or tissue irritation. Studies and dental resources confirm this electrochemical process is specific to bimetallic interactions in the mouth, distinguishing it from unrelated options: nuclear reactions (subatomic), precipitation (ion formation), and thermodynamics (energy principles).