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Amalgam filling on first molar. In dentistry, amalgam is an alloy of mercury used to fill teeth cavities. [1] It is made by mixing a combination of liquid mercury and particles of solid metals such as silver, copper or tin. The amalgam is mixed by the dentist just before use.
In dentistry, inlays and onlays are used to fill cavities, [1] and then cemented in place in the tooth. This is an alternative to a direct restoration , made out of composite, amalgam or glass ionomer , that is built up within the mouth.
Composites and amalgam are used mainly for direct restoration. Composites can be made of color matching the tooth, and the surface can be polished after the filling procedure has been completed. Amalgam fillings expand with age, possibly cracking the tooth and requiring repair and filling replacement, but chance of leakage of filling is less.
A better alternative to posts on a posterior tooth is core restoration which extends down into the entrance of the root canal through the Nayyar technique using an amalgam dowel–core. [7] In this technique, retention for the amalgam-core is derived from the remaining pulp chamber and the prepared canals by extending amalgam to these areas. [8]
Fracture occurs due to the forces exerted on the dental unit. The enamel is splintering: [4] [5] [6] after an unfortunate fall, bump or contusion of the jaw; due to excessive chewing, eating too hard food, and chewing nuts and seeds; grinding of teeth and a bad habit of chewing on things, such as pencils, pens, etc.; due to stresses caused by ...
Cracked tooth syndrome could be considered a type of dental trauma and also one of the possible causes of dental pain.One definition of cracked tooth syndrome is "a fracture plane of unknown depth and direction passing through tooth structure that, if not already involving, may progress to communicate with the pulp and/or periodontal ligament."
Polishing of an amalgam filling; The pressure from high speed turbine dental drills can be enough to force amalgam particles into soft tissue, [1] as may occur when an old amalgam filling is being removed; When a tooth with an amalgam filling is extracted, [5]: 183 e.g. broken bits of amalgam filling falling into an extraction socket unnoticed [1]
Amalgam is a metallic filling material composed from a mixture of mercury (from 43% to 54%) and a powdered alloy made mostly of silver, tin, zinc and copper, commonly called the amalgam alloy. [16] Amalgam does not adhere to tooth structure without the aid of cements or use of techniques which lock in the filling, using the same principles as a ...