Manufacture of heat-resistant mold for manufacturing dental restoration, by preparing slurry from powdered heat-resistant material consisting of powdered particles coated, with hydrophobic material liquid at room temperature, with water

摘要

A heat-resistant mold for manufacturing a dental restoration, is manufactured by providing a wax model; preparing a slurry from a powdered heat-resistant material consisting of powdered particles coated, with a hydrophobic material liquid at room temperature, with water or another mixing liquid; applying the slurry to the prepared model; heating the wax model covered with slurry, where the wax is burnt off. An Independent claim is also included for a powdered heat-resistant investment composition, comprising (wt.%): magnesium oxide (5-12); phosphate salt (8-15); cristobalite (15-35); hydrophobic material (0.1-0.8) liquid at room temperature, and the balance being quartz.