Porcelain in Dentistry
The role of dental porcelain in creating natural-looking restorations.
Dental porcelain is a ceramic material specifically formulated to replicate the optical properties of natural teeth, including translucency, fluorescence, and opalescence. It consists primarily of feldspar, quartz, and kaolin, with metal oxides added to achieve specific shades and characteristics. Different types of porcelain are used for different applications based on their strength and aesthetic properties. Feldspathic porcelain offers the highest aesthetic potential and is used for veneers and the outer layer of porcelain-fused-to-metal (PFM) and porcelain-fused-to-zirconia restorations. Its layering technique allows skilled technicians to recreate the subtle color gradients, translucency, and characterization seen in natural teeth. However, feldspathic porcelain has relatively low strength and requires a supporting substructure. Pressed and milled ceramics like lithium disilicate (e.max) and leucite-reinforced porcelain offer improved strength while maintaining good aesthetics. These materials can be used for monolithic restorations without a substructure. The choice of porcelain type depends on the clinical situation, aesthetic requirements, and the location in the mouth.