Valiant® Ph.D. Sure Caps® contain Palladium-enriched, phase-dispersed amalgam alloy used as a filling material for dental restorations. Valiant Ph.D. has the lowest mercury content of any dispersed phase system and a high copper content that eliminates the Gamma II compound completely. Palladium enriched to build early strength, Valiant Ph.D. resists corrosion, tarnishing and marginal deterioration. Also its fine particle size results in smoother carving, faster wetting, faster setting and a denser amalgam mass.