Impression, dental

A mould taken of the teeth, gums, and palate. A quick-setting material, such as alginate, is placed in a mould over the teeth. The mould is removed, and plaster of Paris is poured into it to obtain a model of the area. This model is then used as a base on which to build a denture, bridge, or dental inlay. Dental impressions are also used in orthodontics to study the position of the teeth and to make orthodontic appliances to correct irregularities.


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