Preparation (dental)

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A preparation is the finished product of a tooth's structure prior to restoration with a dental restorative material, such as gold, amalgam, composite, porcelain or any number of other materials.

There are two types of preparations.

• Intracoronal preparations are those preparations which serve to hold restorative material witin the confines of the structure of the crown of a tooth. Examples include all classes of cavity preperations for composite or amalgam, as well as those for gold inlays. Intracoronal preparations are also made as female recipients to receive the male componenets of RPDs.
• Extracoronal preparations are those preparations which serve as a core or base upon which or around which restorative material will be placed to bring the tooth back into a functional or esthetic structure. Examples include crowns and onlays, as well as veneers.