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 ?
Separating medium was applied on to the dental plaster mould with the help of a camel hair brush and dried.
Ten d after exposure to the flies, dead ants were removed from the containers twice daily and placed on moistened dental plaster to await decapitation.
Fashioned to the exact likeness of each finished piece, the molds are filled with dental plaster. They are placed in an oven, which reaches a temperature of 800 degrees centigrade over a period of two hours.
Cast in dental plaster, a favored medium for Whiteread, its desiccated surface is coolly wistful without being romantic, giving permanence to what would otherwise be a transitory and overlooked passage in life.
The prepared dental plaster casts were examined for morphological variations such as shoveling, bushman canine, distal accessory ridge and cusp of Carabelli.