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
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

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]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Similarly, Demodex ghanensis mites were isolated from all specimens of infected material extracted from meibomian gland lesions but could not be demonstrated in impression smears from the eyes or histological sections from the eyelids of noninfected cattle.
Impression smears vs Tissue sections: The comparison of tissue sections to impression smears yielded unrivaled results.
Statistical analysis signified considerably higher number of AFB in tissue sections of intestines (100%) as compared to intestinal impression smears (12.76%) as shown in Table-1.
Brain impression smears from the four were negative for lyssavirus antigen by FAT.
Tape impression smears, scrapings and swab material were collected from lesions (Reddy and Sivajothi, 2014).
Tape impression smears collected from ears revealed budding yeast cells under oil immersion objective after staining with new methylene blue (Fig.
Impression smears were collected from ear lesions and stained by Giemsa stain.
Heart blood and lung tissue swabs from twenty two animals, positive for bipolar organisms on impression smears were incubated in sterile tryptose soya broth for 24 hours at 37[degress]C and streaked over blood and Mackonkey agar.
Laboratory examination was carried out by microscopic examination of glass slide impression smears, tape impression smears, skin scrapings and hair plucks as per the methods described by Reddy et al.
Deep skin scrapings were negative for mange mites, however, impression smears revealed preponderance of Staphylococcus spp.