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Definition of Pit and Fissure and Sealents: A material that is introduced into the occlusal pit and fissure of caries susceptible teeth, thus forming a micromechanically–bonded, protective layer cutting access of caries producing bacteria from their source of nutrients. History and Evolution of Pit and Fissure Sealents 1922- “PROPHYLACTIC ODONTOTOMY”-HYATT 1939- Gore – use of [...]
Metal Ceramic Crowns or Porcelain fused metal crowns are used to get both Strength(due to metal) and Esthetics(due to Ceramic) which make it an ideal type of crown for every tooth be it Anterior or Posterior. Indications of Metal Ceramic: The metal ceramic crown is indicated on teeth that require complete coverage, where significant esthetic [...]
Ceramics or Porcelains are chemically intimate mixtures of metallic and non metallic elements, that allow ionic (K2O) and/or covalent bonding (SiO2) to occur. The most common ceramics used in dentistry are alloys of 3 main metallic oxides (SiO2, Al2O3, K2O). Composition of Dental Ceramics and Dental Porcelain: 1) Feldspar: 60 to 80%. this is a [...]
Prevention of Corrosion is very important for the long term success of a Dental Restoration, so you have to take the following precautions to prevent corrosion from ruining your Restoration. How to prevent Dental Corrosion First lets know about Dental corrosion a bit and then proceed to Steps which help in prevention: Definition: A Chemical [...]
Definition: A Chemical reaction between a metal and its environment to form metal compound. A Chemical or Electrochemical process through which a metal is attacked by natural agents such as air and water resulting in partial or complete dissolution, deterioration or weakening of any solid substance. A common Example of corrosion is “Rusting of Iron” [...]
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