micro test#2
Fluoride is
a salt of hydrofluoric acide and is stored primarily in minerlizing tissues such as bones and teeth
types of Systemic fluoride
water fluoridation
food
systemic fluoridation supplements
tablets
mouth rinses
drops
absorption of systemic fluoride
-absorbed rapidly by the stomach as hydrogen fluoride
- fluoride not absorbed by the stomach will be absorbed in the small intestine
- fluoride then enters the bloodstream with a max plasma levels being reached in about 30 min. --> most fluoride is absorbed within 1 hours
- 99% of fluoride in the body is located in mineralized tissue ( bones and teeth)
benefits of systemic fluoride
1. pre-eruptive: mineralization stage- F deposits after the ameloblasts form enamel matrix and wile mineralization occurs-F source is tissue and blood
2. maturation stage: F continues to deposit in surface enamel - F source in nutrient tissue fluids - highest F deposition
Fluoride in enamel -->Up take
Depends on the amount of available fluoride & the length of time that it is available
Hypo-mineralized enamel
absorbs fluoride in greater quantities than sound enamel
Demineralized enamel that has remineralized will
have a greater concentration of fuolride than sound enamel
the outer surface has
the highest concentration and the amount decreases toward the interior of the tooth
Fluoride level can be greater in exposed dentin than enamel
Higher concentration is at the pulpal/inner surface ( travels through the dentinal tubules toward the pulp
Fluoride in cementum
the level of fluoride in cementum is high and increses with age
demineralization is the
loss of minerals content from the teeth