pressure area

pressure area,

an oral area that is subject to excessive displacement of soft tissue by a prosthesis.

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area,

n region.

area, apical,

n See base, apical.

area, basal seat,

n (denture-bearing area, denture-supporting area, stress-bearing area, stress-supporting area), the portion of the oral structures available to support a denture.

area, contact,

n See point, contact.

area, denture-bearing,

n See area, basal seat.

area, denture-supporting,

n See area, basal seat.

area, impression,

n the surface of the oral structures recorded in an impression.

area, pear-shaped,

n See pad, retromolar.

area, post dam,

n See area, posterior palatal seal.

area, posterior palatal seal,

n the soft tissues along the junction of the hard and soft palates on which compression, within the physiologic limits of the tissues, can be applied by a denture to aid in its retention.

area, postpalatal seal

n See area, posterior palatal seal.

area, pressure,

n an area of excessive displacement of soft tissue by a prosthesis.

area, recipient,

n the portion of the body on which a skin, bone, tooth, or other graft is placed.

area, relief,

n the portion of the surface of the oral cavity under prosthesis on which pressures are reduced or eliminated.

area, rest (rest seat),

n the prepared surface of a tooth or fixed restoration into which the rest fits, giving support to a removable partial denture.

area, rugae

n (rugae zone), that portion of the hard palate in which rugae are found.

area, saddle,

n See area, basal seat.

area, stress-bearing,

n See area, basal seat.

area, stress-supporting,

n See area, basal seat.

area, supporting,

n the areas of the maxillary and mandibular edentulous ridges best suited to carry the forces of mastication when the dentures are in use. See also area, basal seat.

area, work,

n the entire space in which the dental hygienist moves and works while treating a patient. This includes the instrument tray and dental chair, unit, and light.

Arenaviridae

n a grouping of enveloped, helix-shaped RNA viruses implicated in a relatively benign form of meningitis (lymphoctyic choriomeningitis; severe encephalitic forms do occur rarely) that affects young adults.

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pressure,

n a stress or strain that may occur by compression, pull, or thrust; an applied force.

pressure area,

n See area, pressure.

pressure atrophy,

n See atrophy, pressure.

pressure, biting,

n the actual or potential power used in bringing the teeth into contact. See also pressure, occlusal.

pressure, blood,

n See blood pressure.

pressure, deeper,

n a pressure to the body–in excess of that which stimulates Meissner's corpuscles, Merkel's disks, or the hair receptors of light touch–that stimulates the deeper receptors such as Pacini's corpuscles. These latter deep-pressure perception organs lie in the inner layers of the dermis and in the muscle and tendon groups.

pressure, equalization of,

n the act of distributing pressure evenly.

pressure, hand,

n force applied by an instrument held in the hand.

pressure, hydraulic,

n pressure transmitted by a liquid trapped between the tooth and a restoration being cemented.

pressure, hydrostatic,

n the pressure in the circulatory system exerted by the volume of blood when it is confined in a blood vessel. The hydrostatic pressure, coupled with the osmotic pressure within a capillary is opposed by the hydrostatic and osmotic pressure of the surrounding tissues. Fluids flow from the higher pressure areas to the lower pressure areas.

pressure, intrapleural,

n pressure within the pleura.

pressure, occlusal,

n any force exerted on the occlusal surfaces of teeth. See also force, occlusal and load, occlusal.

pressure, osmotic,

n the stress that develops when solutions containing different concentrations of solute in a common solvent are separated by a membrane that is permeable to the solvent but not the solute.

pressure, partial,

n the pressure exerted by each of the constituents of a mixture of gases.

pressure, pulse,

n the difference between systolic and diastolic pressure.

pressure sensibility,

n the ability to detect light touch and deep pressure. See also corpuscle, Meissner's; corpuscle, Merkel's; and corpuscle, Pacini's.

pressure sore,

n a decubitus ulcer caused when the bony protuberances of the body are subjected to chronic pressure from the weight of the body without breaks.