The Tribology Of Dental Ceramics

The Tribology Of Dental Ceramics

Write Mode supply, Manufacturing procedure 
Answer: 

Mode of Supply:

• Enamel porcelain powders in various shades (in bottles)
• Dentin porcelain powders in various shades (in bottles)
• Liquid for mixing enamel, dentin, gingival and transparent
• Opaquer powders in various shades/and liquids for mixing
• Gingival porcelain powder in various shades
• Transparent porcelain powder
• A variety of stain (color) powders
• Glaze powder
• Special liquid for mixing stains and glaze.

Manufacturing Procedure:

• Ceramic raw materials are mixed together in a refractory crucible and heated to high temperature (above 1000°C)
• At these temperatures, the water of crystallization is lost and the flux reacts with grains of silica, kaolin, and feldspar and partly combines them together.
• Feldspar undergoes decomposition to form a glass and a crystalline material known as leucite.
• In the next phase, the molten glass will dissolve the kaolin and quartz
• Continuous heating results in total dissolution and forms a homogeneous glass.
• The fused mass is then quenched in water and a frit is formed.
• The fruit is ground to a fine powder and can be used for the fabrication of porcelain restorations.
• During subsequent firing in the dental lab, the powder is fused to form restoration.