impression

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impression

 [im-presh´un]
1. a slight indentation or depression, as one produced in the surface of one organ by pressure exerted by another.
2. a negative imprint of an object made in some plastic material that later solidifies.
3. an effect produced upon the mind, body, or senses by some external stimulus or agent.
basilar impression

im·pres·sion

(im-presh'ŭn),
1. A mark seemingly made by pressure of one structure or organ on another, seen especially during cadaveric dissections. See also groove for the various impressions of the lungs, for example, descending aorta, subclavian artery, and vena cava. Synonym(s): impressio [TA]
2. An effect produced on the mind by some external objects acting through the organs of sense. Synonym(s): mental impression
3. An imprint or negative likeness; especially, the negative form of the teeth and/or other tissues of the oral cavity, made in a plastic material that becomes relatively hard or set while in contact with these tissues, made to reproduce a positive form or cast of the recorded tissues; classified, according to the materials of which they are made, as reversible and irreversible hydrocolloid impression, modeling plastic impression, plaster impression, and wax impression.
[L. impressio, fr. im- primo, pp. -pressus, to press upon]

impression

/im·pres·sion/ (im-presh´un)
1. a slight indentation, as one produced in the surface of one organ by pressure exerted by another.
2. a negative imprint of an object made in some plastic material that later solidifies.
3. an effect produced upon the mind, body, or senses by some external stimulus or agent.

basilar impression 
cardiac impression  an impression made by the heart on another organ.
dental impression  one made of the jaw and/or teeth in some plastic material, which is later filled in with plaster of Paris to produce a facsimile of the oral structures present.

impression

(ĭm-prĕsh′ən)
n.
Dentistry An imprint of the teeth and surrounding tissues, formed with a plastic material that hardens into a mold for use in making dentures, inlays, or plastic models.

impression

[impresh′ən]
Etymology: L, imprimere, to press into
1 (in dentistry and prosthetic medicine) a mold of a part of the mouth or other part of the body from which a dental restoration or prosthesis may be constructed.
2 (in the medical record) the examiner's diagnosis or assessment of a problem, disease, or condition.
3 a strong sensation or effect on the mind, intellect, or feelings.
4 a slight indentation or depression, as one produced on the surface of one organ by pressure exerted by another.
5 use of an elastomeric material to physically record a prepared tooth impression. Artificial dental stone (gypsum) is poured into the impression, making an exact replica of the tooth/mouth for the construction of a prosthesis. See also indirect restorative method.

im·pres·sion

(im-presh'ŭn)
1. A mark seemingly made by the pressure of one structure or organ on another, seen especially in cadaveric dissections. See also groove for the various impressions of the lungs, e.g., descending aorta, subclavian artery, and vena cava.
2. An effect produced on the mind by some external object acting through the organs of sense.
3. An imprint or negative likeness; especially, the negative form of the teeth and/or other tissues of the oral cavity, made in a plastic material that becomes relatively hard or set while in contact with these tissues, made to reproduce a positive form or cast of the recorded tissues; classified, according to the materials of which they are made, as reversible and irreversible hydrocolloid impression, modeling elastic gel impression, plaster impression, and wax impression.
Synonym(s): impressio [TA] .
[L. impressio, fr. im- primo, pp. -pressus, to press upon]

impression

In dentistry, a negative mould of the teeth or other mouth structures, made in plastic, which is later filled with Plaster of Paris to provide a perfect copy of the anatomy.

Impression

An imprint of the upper or lower teeth made in a pliable material that sets. When this material has hardened, it may be filled with plaster, plastic, or artificial stone to make an exact model of the teeth.
Mentioned in: Malocclusion

im·pres·sion

(im-presh'ŭn)
1. [TA] An imprint or negative likeness; especially, negative form of the teeth and/or other tissues of the oral cavity, made in a plastic material that becomes relatively hard or set while in contact with these tissues, made to reproduce a positive form or cast of the recorded tissues; classified, according to the materials of which they are made, as reversible and irreversible hydrocolloid impression, modeling plastic impression, plaster impression, and wax impression.
2. [TA] Mark seemingly made by pressure of one structure or organ on another, seen especially during cadaveric dissections.
3. Effect produced on the mind by some external objects acting through the organs of sense.
[L. impressio, fr. im- primo, pp. -pressus, to press upon]

impression

1. a slight indentation or depression, as one produced in the surface of one organ by pressure exerted by another.
2. a negative imprint of an object made in some plastic material that later solidifies.
3. an effect produced upon the mind, body or senses by some external stimulus or agent.

impression plate
a plastic plate with a central well filled with agar that has a convex surface. The agar is pressed against the tissue to be examined bacteriologically.
dental impression
a mold taken of the teeth or jaw and used in the fabrication of dental appliances to be used in restorative dentistry or orthodontics.
impression smear
a sample of cells, microorganisms or fluids obtained by pressing against the surface of a specimen which may be tissue excised or in situ. Commonly used for cytology examination.