Dental Cavity varnish is indicated under amalgam restorations to: A Prevent galvanic currents from reaching the pulp B Seal dentinal tubules and improve the marginal seal of the restorations C Improve retention D Act as an effective thermal insulator 💡 Explanation Cavity varnish is indicated under amalgam restorations to: ✓ Correct Answer: B. Seal dentinal tubules and improve the marginal seal of the restorations