stress response

stress response,

n physiologic response to stress; comprises three phases. The fight-or-flight response is the first phase, in which the sympathetic nervous system is activated, increasing heart rate, respiration, and blood pressure. In the second phase the organism adapts to the source of stress. The third and final phase is exhaustion. Also called
general adaptation syndrome.

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stress,

n 1. a force induced by or resisting an external force; measured in terms of force per unit area.
2. the force of energy directed against a tissue structure or against the function of tissue as the result of injury and trauma associated with fracture, burn, infection, surgical procedure, pharmacologic action, or anxiety states. The response to stress involves local metabolic function, the hormonal activity of the endocrine system regulated by the pituitary gland, and the autonomic and central nervous systems. The stress phenomenon is often associated with the general adaptation syndrome.
3. in prosthetic dentistry, forcibly exerted pressure (e.g., the pressure of the maxillary teeth against the mandibular teeth or the pressure contact of a distorted removable partial denture on the supporting teeth or ridge structures).

stress, axial,

n excessive force applied vertically to the teeth and their periodontium.

stress, bone in,

n the responses of bony structures to applied force. With application of excessive pressure stimuli to bone, adaptation may occur by the formation of thicker and more numerous trabeculae. If tissue components cannot compensate for excessive stress, bone resorption will occur.

stress, buccolingual,

n an excessive pressure exerted against teeth and their attachment apparatus from a buccal or lingual aspect.

stress, compressive,

n the internal induced force that opposes shortening of the material in a direction parallel to the direction of the stress.

stress control,

n See control, stress.

stress, damage to restorations by,

n a mechanical property that pertains to the capacity of substances used for restorative and preventive applications to loosen in response to continual pressure over time. See also strain.

stress response,

n the physiologic changes that occur as a result of threatening situations, including rapid breathing, increased heart rate, and increased perspiration. Also known as the “fight or flight” response.

stress, shearing,

n the internal induced force that opposes the sliding of one plane of the material on the adjacent plane in a direction parallel to the stress.

stress, tensile,

n the internal induced force that opposes elongation of a material in a direction parallel to the direction of stress.

stress-bearing area,

n See area, basal seat.

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stress response

Flight-or-fight response, see there