Category: P

A life vest used to prevent drowning and near drowning. People engaged in water sports, such as boating or water skiing, or rescuers working on or near the water should wear PFDs at all times. The U.S. Coast Guard sets standards and establishes specifications for the manufacture and use of PFDs. Personal flotation devices may…

A slowly progressive eruption of reddish papules, principally on the legs.  

Dermatitis that is a direct rather than an allergic response.  

Dermatitis resulting from irritation or sensitization of the skin by urushiol, the toxic resin of the Rhus (Toxicodendron) family of plants. There is no absolute immunity, although susceptibility varies greatly, even in the same individual.  

A dysphoric mood disorder that follows a cerebral infarction, found in about a quarter of stroke patients. Although for many years depression after strokes was thought to occur mainly in patients who had injured the nondominant hemisphere of the brain, research has shown that this phenomenon is most common in female patients and those who…

The 20 primary or deciduous teeth in children. In general, the order of eruption is two lower central incisors, 6 to 8 months; two upper central incisors, 5 to 7 months; two lower lateral incisors, 8 to 11 months; two upper lateral incisors, 7 to 10 months; four canines (cuspids), lower and upper, 16 to…

Several successive sets of teeth developing during a lifetime.  

The area of dentistry that seeks to improve the dental health of communities by epidemiological studies, research in preventive methods, and better distribution, management, and use of dental skills.  

The replacement of defective or missing teeth with artificial appliances such as bridges, crowns, and dentures.  

That phase of dentistry concerned with the maintenance of the normal masticatory apparatus by teaching good oral hygiene and dietary practice, and preserving dental health by early restorative procedures. A facet of dentistry focused on thwarting tooth decay and gum ailments. It involves promoting effective oral hygiene practices, administering fluoride treatment, and performing scaling procedures.…