impression

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impression

Dentistry an imprint of the teeth and gums, esp in wax or plaster, for use in preparing crowns, inlays, or dentures
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

impression

[im′presh·ən]
(geology)
A form left on a soft soil surface by plant parts; the soil hardens and usually the imprint is a concave feature.
(graphic arts)
A print made from an engraved plate.
A press run or printing of a book.
(metallurgy)
A machined cavity in a forging die for production of a specific geometric shape in the workpiece.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

impression

An advertisement on a Web page. If ads on the Web are not based on a click-through rate (CTR), they are typically sold on a cost per thousand (CPM) basis. One impression is one banner ad displayed on one page. Also called a "view" or "ad view." See banner ad, interstitial ad, pay-per-click and click-through rate.
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References in periodicals archive ?
The increase in abutment height of Group A and C possibly caused by the shrinkage of the impression materials towards to impression tray and the wash trapped in impression tray.
[24.] Cura C, Cotert HS, User A (2003) Fabrication of a sectional impression tray and sectional complete dentures for a patient with microstomia and trismus: a clinical report.
Placement of impression tray in mouth causes distortion of such mobile tissues and hence plaster is applied directly to the tissues.
For the counter-model impression of the arch that does not contain prepared teeth, the assistant fills half to two--thirds of the impression tray with medium viscosity VPS, and then fills the rest of the tray with low viscosity VPS.
A range of impression trays including prefabricated metal or plastic stock tray is used to record a full or partial arch for fabrication of fixed partial dentures.7
The sight of a mouth mirror or impression tray is stimulus enough to cause some patients to gag.
Harmless stimuli, such as the sight of an impression tray, the smell of the dental surgery, or the sound of a dental hand-piece, may become associated with an unpleasant gag response.
With dual arch trays there is a lack of consensus about which impression tray should be used, what viscosity of impression tray material is needed and which side of the dual-arch impression should be poured first to minimize distortion.
Imagine you've just removed an impression tray from a patient's mouth, only to find that there is a void in a critical area, or that the teeth have contacted the tray, requiring the impression to be taken over.
Williams and Watkins examined the properties of alginates that had been siliconized; however, the addition of silicone was found to have no advantage.10 Impression tray design was also studied with regard to dimensional stability.
It was concluded in this study that the most common impression material was impression compound and cold cure polymer was used as impression tray. Impression tray made of self cure material should be used because the use of self cure material is less time consuming and less technique sensitive.
3) Impression material dislodged from impression tray.