| cavity preparation | Removal of dental caries and surgical preparation of the remaining tooth structure to receive a dental restoration, the final form of an excavation in a tooth resulting from such preparation. Corrosion preparation, a preparation in which the hollow parts such as ducts, vessels, or alveoli of the lung are filled with a substance that hardens and persists after dissolving the tissues by digestion. Cytologic filter preparation, a cytologic specimen made by depositing a watery sample (obtained by a variety of methods from many body sites) upon a filter having pores of uniform size smaller than the cellular material to be concentrated; this is followed by fixation and staining, usually with 95% ethyl alcohol and Papanicolaou stain. Heart-lung preparation, an animal preparation in which blood (rendered incoagulable) circulates through the heart and lungs and through an artificial system of vessels representing the systemic circulation; the latter is connected with the divided aorta on the one hand and with the superior vena cava on the other; used in physiologic studies of the heart and circulation. (05 Mar 2000) |
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| cavity preparation base | <dentistry> A layer of dental cement, sometimes medicated, that is placed in the deep portion of a cavity preparation to protect the pulp, reduce the bulk of a metallic restoration, or eliminate undercuts. Synonym: cavity preparation base. (05 Mar 2000) |
| cavity preparation form | The configuration or shape of a cavity preparation. (05 Mar 2000) |
| root canal preparation | Preparatory activities in root canal therapy by partial or complete extirpation of diseased pulp, cleaning and sterilization of the empty canal, enlarging and shaping the canal to receive the sealing material. The cavity may be prepared by mechanical, sonic, chemical, or other means. (12 Dec 1998) |
| preparation | 1. <pharmacology> A medicine made ready for use. 2. <anatomy, pathology> A specimen made ready and preserved for study. Origin: L. Praeparatio (18 Nov 1997) |
| histocytological preparation techniques | Methods of preparing cells or tissues for examination and study of their origin, structure, function, or pathology. The methods include preservation, fixation, sectioning, staining, replica, or other technique to allow for viewing using a microscope. (12 Dec 1998) |
| site preparation | Various treatments applied to a harvested area to promote regeneration of the site. (05 Dec 1998) |
| dental cavity preparation | <dentistry> An operation in which carious material is removed from teeth and biomechanically correct forms are established in the teeth to receive and retain restorations. A constant requirement is provision for prevention of failure of the restoration through recurrence of decay or inadequate resistance to applied stresses. (boucher's clinical dental terminology, 4th ed, p239-40) (12 Dec 1998) |
| tooth preparation | Procedures carried out with regard to the teeth or tooth structures preparatory to specified dental therapeutic and surgical measures. (12 Dec 1998) |
| tooth preparation, prosthodontic | The selected form given to a natural tooth when it is reduced by instrumentation to receive a prosthesis (e.g., artificial crown or a retainer for a fixed or removable prosthesis). The selection of the form is guided by clinical circumstances and physical properties of the materials that make up the prosthesis. (boucher's clinical dental terminology, 4th ed, p239) (12 Dec 1998) |
| benign dry pleurisy | An acute infectious disease usually occurring in epidemic form, characterised by paroxysms of pain, usually in the chest, and associated with strains of Enterovirus coxsackievirus type B. Synonym: benign dry pleurisy, Bornholm disease, Daae's disease, devil's grip, diaphragmatic pleurisy, epidemic benign dry pleurisy, epidemic diaphragmatic pleurisy, epidemic myalgia, epidemic myositis, myositis epidemica acuta, epidemic transient diaphragmatic spasm, Sylvest's disease. (05 Mar 2000) |
| bone dry | Having zero percent moisture content. Wood heated in an oven at a constant temperature of 212 degrees F or above until its weight stabilises is considered bone dry or oven dry. (05 Dec 1998) |
| bone dry unit | A quantity of wood residue which weighs 2,400 pounds at zero percent moisture content. (05 Dec 1998) |
| wet and dry bulb thermometer | An instrument for measuring the tension of the aqueous vapor in the atmosphere, being essentially a wet and dry bulb hygrometer. Origin: Gr. Psychros cold: cf. F. Psychrometre. Source: Websters Dictionary (01 Mar 1998) |
| dry | 1. Free from moisture; having little humidity or none; arid; not wet or moist; deficient in the natural or normal supply of moisture, as rain or fluid of any kind; said especially: Of the weather: Free from rain or mist. "The weather, we agreed, was too dry for the season." (Addison) Of vegetable matter: Free from juices or sap; not succulent; not green; as, dry wood or hay. Of animals: Not giving milk; as, the cow is dry. Of persons: Thirsty; needing drink. "Give the dry fool drink." (Shak) Of the eyes: Not shedding tears. "Not a dry eye was to be seen in the assembly. <medicine> " (Prescott) Of certain morbid conditions, in which there is entire or comparative absence of moisture; as, dry gangrene; dry catarrh. 2. Destitute of that which interests or amuses; barren; unembellished; jejune; plain. "These epistles will become less dry, more susceptible of ornament." (Pope) 3. Characterised by a quality somewhat severe, grave, or hard; hence, sharp; keen; shrewd; quaint; as, a dry tone or manner; dry wit. "He was rather a dry, shrewd kind of body." (W. Irving) 4. Exhibiting a sharp, frigid preciseness of execution, or the want of a delicate contour in form, and of easy transition in colouring. <medicine> Dry area See Cupping. Dry dock. See Dock. Dry fat. See Dry vat (below). Dry light, pure unobstructed light; hence, a clear, impartial view. "The scientific man must keep his feelings under stern control, lest they obtrude into his researches, and colour the dry light in which alone science desires to see its objects." (J. C. Shairp) Dry masonry. See Masonry. Dry measure, a system of measures of volume for dry or coarse articles, by the bushel, peck, etc. Dry pile, a rent reserved by deed, without a clause of distress. Dry rot, a decay of timber, reducing its fibres to the condition of a dry powdery dust, often accompanied by the presence of a peculiar fungus (Merulius lacrymans), which is sometimes considered the cause of the decay; but it is more probable that the real cause is the decomposition of the wood itself. Called also sap rot, and, in the United States, powder post. Dry stove, a hothouse adapted to preserving the plants of arid climates. Dry vat, a vat, basket, or other receptacle for dry articles. Dry wine, that in which the saccharine matter and fermentation were so exactly balanced, that they have wholly neutralized each other, and no sweetness is perceptible; opposed to sweet wine, in which the saccharine matter is in excess. Origin: OE. Drue, druye, drie, AS. Dryge; akin to LG. Droge, D. Droog, OHG. Trucchan, G. Trocken, Icel. Draugr a dry log. Cf. Drought, Drouth, 3d Drug Source: Websters Dictionary (01 Mar 1998) |