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A crown may be needed when a large dental cavity threatens the health of a tooth. Some dentists will also finish root canal treatment by covering the exposed tooth with a crown. [1] A crown is typically bonded to the tooth by dental cement. They can be made from various materials, which are usually fabricated using indirect methods. Crowns are ...
Lithium disilicate has found applications in dentistry as a dental ceramic material for dental restorations such as crowns, bridges, and veneers in the form of Li 2 Si 2 O 5. Lithium disilicate has an unusual microstructure that consists of many randomly oriented small and interlocking plate-like needle-like crystals.
The Nordic Institute of Dental Materials (NIOM) performs several tests to evaluate dental products in the Nordic countries. In the European Union, dental materials are classified as medical devices according to the Medical Devices Directive. In USA, the Food and Drug Administration is the regulatory body for dental products.
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Dental porcelain (also known as dental ceramic) is a dental material used by dental technicians to create biocompatible lifelike dental restorations, such as crowns, bridges, and veneers. Evidence suggests they are an effective material as they are biocompatible , aesthetic , insoluble and have a hardness of 7 on the Mohs scale .
They can be used in direct restorations to fill in the cavities created by dental caries and trauma, minor buildup for restoring tooth wear (non-carious tooth surface loss) and filling in small gaps between teeth (labial veneer). Dental composites are also used as indirect restoration to make crowns and inlays in the laboratory.
This image taken from the Dental Cosmos shows a box of bottles containing dental cement which was used to lute dental crowns, bridges and inlays. It was produced by the L.D. Caulk Company in the early 1900s. A luting agent is a dental cement connecting the underlying tooth structure to a fixed prosthesis.
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