A white powder made of a calcium compound that, when mixed with water, produces a paste that can be shaped before it sets.
Plaster of Paris is used for constructing casts and making dental models (see impression, dental).
A form of calcium sulphate, which, after soaking in water, sets ?rmly. For this reason it is widely used as a form of splinting in the treatment of fractures, for producing casts to immobilise parts of the body, and for dental models. Splints are made with bandages impregnated with plaster and a suitable adhesive. Its great advantage, compared with an ordinary splint, is that it can be moulded to the shape of the limb.
a preparation of gypsum (calcium sulphate) that sets hard when water is added. It is used in various modified forms in dentistry to make *plaster models. It is also used in orthopaedics for preparing plaster *casts.
(in dentistry) an accurate positive cast of the teeth and jaws made from modified plaster of Paris. A pair of models are used to study the dentition, particularly before treatment. Models are also used to construct dentures, orthodontic appliances, and such restorations as crowns.... plaster model
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