plaster

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plaster

 [plas´ter]
1. a mixture of materials that hardens; used for immobilizing or making impressions of body parts.
2. an adhesive substance spread on fabric or other suitable backing material, for application to the skin, often containing some medication, such as an analgesic or local vasodilator.
plaster of Paris calcium sulfate dihydrate, reduced to a fine powder; the addition of water produces a porous mass used in making casts and bandages to support or immobilize body parts, and in dentistry for making study models.

plas·ter

(plas'tĕr),
1. A solid preparation that can be spread when heated and that becomes adhesive at the temperature of the body; used to keep the edges of a wound in apposition, to protect raw surfaces, and, when medicated, to redden or blister the skin, as in mustard plaster, or to apply drugs to the surface to obtain their systemic effects.
2. In dentistry, colloquialism for plaster of Paris.
[L. emplastrum; G. emplastron, plaster or mold]

plaster

/plas·ter/ (plas´ter)
1. a gypsum material that hardens when mixed with water, used for immobilizing or making impressions of body parts.
2. a pastelike mixture that can be spread over the skin and that is adhesive at body temperature; varied uses include skin protectant and counterirritant.

plaster of Paris  calcined calcium sulfate; on addition of water it forms a porous mass that is used in making casts and bandages to support or immobilize body parts, and in dentistry for making study models.

plaster

(plăs′tər)
n.
1. Plaster of Paris.
2. A pastelike mixture applied to a part of the body for healing or cosmetic purposes.
3. Chiefly British An adhesive bandage.
v. plas·tered, plas·tering, plas·ters
v.tr.
To apply a plaster to: plaster an aching muscle.
v.intr.
To apply plaster.

plas′ter·er n.
plas′ter·y adj.

plaster

Etymology: Gk, emplastron
1 any composition of a liquid and a powder that hardens when it dries, used in shaping a cast to support a fractured bone as it heals, such as plaster of paris.
2 a home remedy consisting of a semisolid mixture applied to a part of the body as a counterirritant or for other therapeutic reasons, such as a mustard plaster.

plas·ter

(plas'tĕr)
1. A solid preparation that can be spread when heated and becomes adhesive at the temperature of the body; used to keep the edges of a wound in apposition, to protect raw surfaces, or to apply medicine topically for local or systemic effects.
2. dentistry A type of gypsum containing calcium sulfate hemihydrate and porous crystals that require more water during mixing than other such products; used in preparing study models (nonworking casts).
[L. emplastrum; G. emplastron, plaster or mold]

plas·ter

(plas'tĕr)
1. In dentistry, general term for calcined gypsum products used to fabricate dental casts and products used to attach casts to articulators. Principal constituent is calcium sulfate hemihydrate.
2. A solid preparation that can be spread when heated and becomes adhesive at body temperature; used to keep wound edges in apposition, to protect raw surfaces, and, when medicated, to redden or blister skin, as in mustard plaster, or to apply drugs to the surface to obtain their systemic effects.
[L. emplastrum; G. emplastron, plaster or mold]

plaster (plas´tur),

n colloquial term applied to dental plaster of paris.
plaster headcap,
plaster, impression,
n plaster used for making impressions. Sets rapidly and is characterized by low-setting expansion and strength.
plaster, model,
n plaster used for diagnostic casts and as an investing material.
plaster of paris,
n the hemihydrate of calcium sulfate that, when mixed with water, forms a paste that subsequently sets into a hard mass. See also beta-hemihydrate.

plaster

1. a mixture of materials that hardens; used for immobilizing or making impressions of body parts.
2. an adhesive substance spread on fabric or other suitable backing material, for application to the skin, often containing some medication, such as an anodyne or rubefacient.

plaster cast
see cast (5).
plaster of Paris
calcium sulfate dihydrate, reduced to a fine powder; the addition of water produces a porous mass used in making casts and bandages to support or immobilize body parts.
plaster rolls
the dry material for constructing plaster casts is packaged as rolls of impregnated gauze which is thoroughly soaked in water before being applied by unrolling around the site of the fracture.
plaster shears
special shears to cut plaster of Paris casts. Designed to cut upwards away from the tissues to avoid injury. Called also plaster scissors, Esmarch plaster shears.
plaster spreader
a reverse pincer device with flat blades that are fitted down into a cut made in a plaster cast that is to be removed. Opening the handles forces the plaster apart.