Dental The setting reaction of dental amalgam proceeds primarily by _____. A Dissolution of the entire alloy particle into mercury. B Dissolution of the Cu from the particles into mercury. C Precipitation of Sn-Hg crystals. D Mercury reaction with Ag on or in the alloy particle. 💡 Explanation The setting reaction of dental amalgam proceeds primarily by _____. ✓ Correct Answer: D. Mercury reaction with Ag on or in the alloy particle.