All-Porcelain Ceramic Crowns   

Crowns (or caps) are dental restorations that are placed over a tooth when conservative restorations are insufficient to restore form and function. 
A bridge serves to replace a missing tooth or teeth. One type of bridge consists of crowns placed on either side of the missing tooth to connect the replacement tooth or teeth to them. 
Another type of bridge consists of the replacement tooth attached to the adjacent teeth with wing-like appendages. Bridges can also be supported by dental implants. 
Crowns and bridges can be made entirely of tooth-colored material, metal, or a combination to provide optimal aesthetics.