(plak )

[Fr. plaque, metal plate]

A patch on the skin or on a mucous membrane.

atheromatous p.An obstruction in the lining of an artery, formed by the abnormal accumulation of lipids (fats) and sometimes calcium.

bacterial p.Dental plaque.

calculus p.Dental plaque that has mineralized. SYN: tartar (2).

dental p.A biofilm that accumulates and grows on the crowns of teeth. Plaque is colorless, transparent, and the forerunner of dental caries and periodontal disease. Measures to prevent plaque buildup include daily self-care of the teeth, careful use of dental floss, and periodic prophylaxis by a dentist or dental hygienist.

Treatment should include removal on a daily basis. Brushing and flossing are typical methods of plaque removal. Additional techniques may include water irrigation, chemical plaque control, and auxiliary oral hygiene aids.

SEE: calculus; caries; periodontal disease; periodontitis.

fibrous p.

SEE: arteriosclerosis.

mucous p.Condyloma latum.

senile p.Accumulations of bundled amyloid fibrils surrounding normal and damaged neurons in the brain, a finding on pathological inspection of brain tissue from patients with Alzheimer dementia.

vulnerable p.A plaque whose lipid and fibrous characteristics make it likely to rupture.