Category: D
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Dental chart
A diagram of the teeth on which clinical and radiographic findings can be recorded. It includes existing restorations, decayed surfaces, missing teeth, periodontal pocket depth, and the conditions of all soft tissues.
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Densitometer
An instrument that measures bacterial growth and the effect on it of antiseptics and bacteriophages. An apparatus employed to quantify the optical density of a specific radiograph.
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Densimetric analysis
Analysis by determination of the specific gravity (density) of a solution and estimation of the amount of solids.
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Dense granule deficiency syndrome
A disorder of blood clotting caused by an absence of dense granules in platelets. These granules normally help activate platelets when a blood vessel is cut or injured and help damaged blood vessels to constrict. Their deficiency produces abnormal platelet aggregation. Characteristic laboratory findings may include a prolonged bleeding time.
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Denitrogenation
In aerospace medicine, the removal of nitrogen from the body of a person preparing to fly in an environment in which the barometric pressure will be much lower than at sea level. Prior to the flight, the person breathes 100% oxygen for a variable length of time, depending on the anticipated degree of reduced barometric…
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Denitrify
To remove nitrogen from something.
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Denial and isolation
According to Elisabeth Kubler-Ross, the initial emotional reactions to being told of impending death. Individuals refuse to accept the diagnosis and seek additional professional opinions in the hope that the predicted outcome is erroneous. When these efforts are in vain, the patient feels isolated and abandoned.
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Dendrophagocytosis
Absorption of portions of astrocytes by microglia cells.
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Dendritic calculus
A renal stone molded in the form of the pelvis and calyces.
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Denatured
A change in the usual character of a substance, as when the addition of methanol to alcohol renders it unfit for consumption.