Category: D
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Dual scan
Digital technique where two scans, containing different data sets, are combined together into one file. An example of a dual scan is a CBCT scan combined with an intraoral scan. The resultant file contains the surface data captured by the intraoral scan and the 3D slices of the underlying hard tissue from the CBCT scan.…
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Dual‐energy X‐ray absorptiometry (DXA, DEXA)
Test measuring bone mineral “density” (BMD). Two low‐dose X‐ray beams with differing energy levels are aimed at the patient’s bones. By subtracting the soft tissue absorption, the BMD can be determined from the absorption of each beam by bone.
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Dry socket
Localized osteitis of the alveolus following tooth extraction due to infection or loss of the blood clot. Inflammation of the socket of a tooth which has just been removed. Inflammation at the site of an extracted tooth, characterized by pain, pus, and frequently infection. An unhealed wound at the site of a tooth extraction, characterized…
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Dry processing/dry milling
A manufacturing process where a material is machined without the need for liquid for cooling and lubrication. Dry processing is applied mainly with respect to zirconium oxide blanks with a low degree of presintering.
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Drug efficacy
The ability of a chemical or a drug to produce a biological effect. The extent to which a drug produces a beneficial result under ideal circumstances. Much of the drug approval process involves testing to ensure that the drug under study has adequate effectiveness or efficacy.
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Drug antagonist
Chemicals that prevent reaction of a drug agonist with its receptor. The antagonist drug competes for the available receptors. A drug that prevents receptor stimulation. An antagonist drug has an affinity for a cell receptor and, by binding to it, prevents the cell from responding to an agonist.
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Drug agonist
Chemicals that react with a receptor and initiate a cellular reaction. This reaction is similar to that of an endogenous hormone or neurotransmitter.
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Drug
Any chemical that alters the physiologic processes of living systems. Any medical substance possessing the qualities that will aid in the diagnosing, treating, curing, or preventing disease or maintaining health. Any substance intended for use in the diagnosis, cure, mitigation, treatment or prevention of disease, or intended to affect the structure or function of the…
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Dross
The solid scum produced from oxides, impurities, or waste materials on the surface of a metal when melted. Waste matter, refuse. Residue remaining in an opium pipe which has been smoked; contains 50 % of the morphine present in the original drug.
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Drilling sequence
The use of drills in a specific order to gradually prepare and increase the diameter of an osteotomy prior to dental implant insertion.