Alginate Alternative
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About alginate alternative
An alginate alternative is a vinyl polysiloxane impression material offered in place of alginate. A study of opposing casts found that the ones from an alginate alternative and from an extended-pour alginate were more accurate in occlusion than those from conventional alginate and from a 3D print. Vinyl polysiloxane is an addition reaction silicone whose polymers cross-link when a platinum or palladium salt catalyst activates them.
A silicone, not a powder and water, so there is no bowl and no mixing by hand. It comes out of a cartridge through a mixing tip, pressed by a dispensing gun.
Sources: Comparative Evaluation of Dimensional and Occlusal Accuracy of Non-Working Antagonist Casts, 2023 (PMC10631232) · The Glossary of Prosthodontic Terms, 9th edition (J Prosthet Dent 2017) · Parkell, Predicta Bioactive Bulk instructions for use