What is the mechanism by which fluoride exerts a caries-reducing effect?
Fluoride's primary role in health is the prevention of dental caries throughout life. Only a trace of fluoride occurs in the human body, but it is important to the mineralization of the bones and teeth. When bones and teeth become mineralized, first a crystal called hydroxyapatite forms from calcium and phosphorus. Then fluoride replaces the hydroxy portion of hydroxyapatite, forming fluorapatite. During development, fluorapatite enlarges crystals in bones and teeth, decreasing their susceptibility to demineralization and making the teeth more resistant to decay. Once the teeth have erupted, the topical application of fluoride by way of toothpaste or mouth rinse continues to exert a caries-reducing effect.
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To lower her risk for osteoporosis, Jaelyn has been encouraged to regularly participate in weight-bearing exercises. All of the following are considered weight-bearing exercise except ________.
A. dancing B. swimming C. hiking D. tennis
During a nutrition screening, adolescents who have been found to have a nutrition-related health risk, such as hyperlipidemia, should be _____.
A. further assessed for use of anabolic steroids B. further assessed for an increase in blood pressure C. referred for in-depth medical assessment and nutrition counseling D. further assessed for diabetes E. referred to an exercise physiologist
What are the symptoms among individuals who are sensitive to sulfite in wine and dried fruit?
What will be an ideal response?
Aging is often associated with xerostomia, a condition characterized by
A) vision disturbances. B) decreased sense of smell. C) dry mouth and decreased salivary production. D) problems chewing.