dental plaster


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Related to dental plaster: dental stone

dental plaster

A powder, when mixed with water, that hardens to form a stonelike investment or model material. It is composed of a hemihydrate of gypsum (CaSO4·2H2O), which differs in compression strength and expansion coefficient according to how it is treated and rehydrated. There are four classes of dental plaster, with differing uses as materials for casts, impressions, or stone models, based on the differences of characteristics.
See also: plaster

den·tal plas·ter

(dentăl plastĕr)
Beta form of calcium sulfate hemihydrate; a fibrous aggregate of fine crystals with capillary pores that are irregular in shape and porous in character; also referred to as plaster of Paris.
References in periodicals archive ?
In addition, a harborage consisting of a dental plaster (Castone, Dentsply, York, PA) disk (14.
As an example of the resort's commitment to excellence and detail in every aspect of the marine habitat, cases of romaine lettuces are served to herbivores, special food blocks of dental plaster, pellets and powdered algae are fed to parrotfish; and live shrimp are cultured and fed to jellyfish.
The cavities served as molds, which, when filled with dental plaster, produced clear reproductions of plants.