Dental Implant Glossary Crown A covering placed on a tooth to replace missing structure and reinforce or strengthen it.  The most                          common crowns made today are from a cast metal (preferably a gold alloy) with esthetic porcelain                          baked to the outside.  In non esthetic areas, or for patients with exremely strong masticatory                          musculature, gold crowns are still used and are still the most durable restorations known.  Today,                           we also have all-porcelain crowns, with incredible esthetics (see Procera).  Crowns are indicated for                          broken or cracked teeth, and any tooth in which the previous filling encompassed more than                           one-half  of the width of the tooth.  Crowns are also still used to solve some cosmetic problems when                           bonding or veneers would not be adequate.  Crowns generally require two visits, and fine crafted                           provisional crowns are placed for the interim. Source: http://www.dentalleaders.com

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