GB1214516143816000000
A POWDER USED TO PRODUCE DENTAL MOULDS USING THE LOST WAX PROCESS FOR THE PRODUCTION OF DENTAL CROWNS. THE POWDER CONTAINS SILICON DIOXIDE (QUARTZ POWDER), CRYSTALLINE SILICA - CRISTOBALITE, MAGNESIUM OXIDE AND AMMONIUM PHOSPHATE AND IS MIXED WITH A LIQUID TO PRODUCE A MOULD OF A DENTAL CROWN MADE OF WAX. THE WAX IS THEN BURNT OUT LEAVING A CAVITY, WHICH IS THEN FILLED WITH HEATED, PLIABLE PORCELAIN WHICH IS FORCED INTO THE MOULD UNDER A VACUUM TO PRODUCE A FINISHED DENTAL CROWN.