What is microleakage in amalgam?
Abstract. Microleakage is a problem of all fresh amalgam restorations and is clinically undetectable. Because microleakage may be responsible for pulp irritation, pulp inflammation, necrosis, and recurrent caries, it is essential to prevent and control it.
What is microleakage in dentistry?
Microleakage is defined as the “diffusion of the bacteria, oral fluids, ions and molecules into the tooth and the filling material interface” OR “defined as the clinically undetectable passage of bacteria, fluids, molecules or ions between tooth and the restorative or filling material.” Many studies emphasize that …
What does microleakage cause?
Microleakage may cause tooth sensitivity, secondary caries, discoloration and even failure of the restoration. In order to overcome these potential problems, materials that are able to bind to the tooth structure have been developed, such as composite resin and glass ionomer cement.
What is burnishing amalgam?
Post-carve burnishing: Burnishing is the process of rubbing, usually performed to make a surface shiny or lustrous. In the context of the condensation procedure, burnishing is the further adaptation and compaction of the amalgam mass at the margins and surface of the restoration.
What causes microleakage composite?
Microleakage occurs due to the formation of gaps on the surface, which can be caused by several factors such as (1) polymerization shrinkage, which causes tension in the area between the teeth and the restoration; (2) formation of microcracks at the margins and consequent defects or damage to the adhesion of the …
How is microleakage prevented?
Because the different physical properties of composite resin and tooth structure cause microleakage in composite tooth restorations, it is possible to eliminate microleakage by making composite’s physical properties more similar to those of tooth structure.
What is sealant retention?
(sēlănt rĕ-tenshŭn) The ability of a dental sealant material to be retained in or on a tooth surface.
How do you reduce microleakage?
Methods to reduce microleakage include correct cavity preparations, correct selection and application of lining material, and application of varnish or dentin adhesives. necrosis can result from this penetration. Bacteria can demineralize the cavity walls adjacent to the restoration and lead to recurrent caries.
Why is amalgam burnished?
Burnishing amalgam margins immediately after condensation and after carving is recommended for the following reasons: (I ) Burnishing improves mechanical and chemical resistance of amalgam margins by decreasing residual .
What is percolation in dentistry?
Percolation is when changes in temperature cause fillings to suck in and push out liquid. When your teeth are exposed to cold temperatures (such as when you eat ice cream or drink a beverage with ice in it), the materials contract.
What is polymerization in dentistry?
Polymer—Chemical compound consisting of a large organic molecule (“macromolecule”) formed by the union of many smaller repeating units (mers). Polymerization—Chemical reaction in which monomers of a low molecular weight are converted into chains of polymers with a high molecular weight.
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