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This system can be used to remove both all metal crowns and metal-ceramic crowns, although with metal-ceramic crowns care should be taken to remove enough ceramic from the area where the hole created to reduce the chances of fracture. The minimum thickness of metal required for the lifting action is approximately 0.5mm.
Ceramic crowns – aggressive bleaching can chemically react with ceramic crowns and reduce their stability. [1] Dental amalgam – exposure to carbamide peroxide solutions increase mercury release for one to two days. [61] [62] The release of amalgam components is said to be due to active oxidation. This increase in amalgam mercury release is ...
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 .
If porcelain is to be applied to the gold crown, an additional minimum of 1 mm of tooth structure needs to be removed to allow for a sufficient thickness of the porcelain to be applied, thus bringing the total tooth reduction to minimally 1.5 mm. For porcelain or ceramic crowns the amount of tooth reduction is 2 mm. For metal, it is 1 mm.
Full-porcelain dental materials include dental porcelain (porcelain meaning a high-firing-temperature ceramic), other ceramics, sintered-glass materials, and glass-ceramics as indirect fillings and crowns or metal-free "jacket crowns". They are also used as inlays, onlays, and aesthetic veneers. A veneer is a very thin shell of porcelain that ...
Zinc polycarboxylate is adherent to tooth structure such as enamel and dentine, but has weak or no bond with gold and porcelain. This presents limited use when it comes to luting gold or porcelain crowns. However, zinc polycarboxylate bonds to non-precious metal alloys that have been increasingly used in porcelain fused to metal (PFM) crowns. [23]
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Whitening, or "tooth bleaching", is the most common cosmetic dental procedure.Whitening is a safe process that is effective for most patients. Multiple whitening options are available, including over the counter products such as Crest Whitestrips, as well as dentist-supervised methods such as in-office treatments or at-home treatments involving trays with a peroxide gel.