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 DEFINITION
There are crowns (cases) of entire recovering realized in this case in material acrylic (plastic). They are used principally like transitory treatment before the laying of a definitive crown of china or metal - china.
SYMPTOMS
They are indicated in the previous teeth in big dental destructions by caries, traumatism, or esthetic motives, or ortodóncicos.
SKILL
A previous history and exploration, along with a suitable position of the patient and of the professional, the use of a correct skill and a few measurements of asepsis are essential norms for the achievement of the preparation of the tooth to receive a crown. First of all it is necessary to realize an evaluation of the occlusion and later there is anesthetized correctly the tooth that is going to be treated. The suitable preparation is realized and the impressions take with the precise material following the indications of the manufacturer. After the emptying the crown is made in the laboratory, which is proved, it fits and ends. Later one proceeds to the provisional and/or definitive case-hardened one.
COMPLICATIONS
The complications it can be those of the treatments of the tooth that supports the crown. Sometimes it is possible to produce the descementado of the crown. In the crowns of acrylic the resistance is minor and she can suffer a rapid wear and perforation.
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DEFINITION 
