Fluoride Flashcards
what is fluorapatie composed of
fluoride, phosphorus and hydrogen
how is fluoride absorbed in the body when ingested
through the stomach and small intestines
pre eruptive stage (mineralization) is during
tooth formation
fluoride is deposited during enamel formation
during what eruptive stage is the most fluoride acquired
pre eruptive (maturation) stage
maturation pre eruptive stage is when fluoride is
deposited after mineralization is complete. prior to eruption
post eruptive stage of fluoride absorption occurs when?
after eruption and continues through life
how does fluoride protect the teeth
is alters the structure of developing enamel - creating acid resistance
dissolving of enamel is AKA
Demineralization
what happens when pH drops below 5.5 within oral cavity?
the biofilm is less saturated by minerals and enamel begins to dissolve to neutralize it
3 actions of fluoride
- inhibits demineralization
- enhances remineralization
- inhibits bacteria from converting carbs into acids (effects the amylase enzyme)
what type of enamel best absorbs fluoride
hypomineralized enamel
it’s already lacking nutrients
what is the pH of plaque
5
what are the two types of sources of fluoride
topical (toothpaste etc)
systemic (food/water)
what % of fluoride is stored in bones
95%
__ppm of fluoride is in water in canada
1 ppm
daily intake of fluoride shouldn’t exceed 0.05-0.07 mgF per ____
kg of body weight
what kind of water filters remove fluoride from water
carbon based filters
what is the least expensive way of preventing carie’s
water fluoridation
fluoride supplements
- sold OTC
- for kids in non fluoridated areas
- not for kids under 3
NAF is ___ with a pH of ___
sodium fluoride - pH 7 (neutral)
what type of fluoride is used on patients with restorations
NAF
APF has a ph of ___
3-3.5
acidulated phosphate fluoride
why is APF favoured and avoided?
favoured due to acidity enhancing the rate of action
avoided for patients without a virgin dentition - not compatible with restorations
APF is composed of what two things
1.23 % fluoride
Ortho Phosphoric Acid
Which type of fluoride can cause staining
Stannous fluoride
why does stannous fluoride cause staining
due to the tin ingredient (stannous)
what is stannous fluoride most effective in treating
root surface desensitizing
how is fluoride stored
in air tight plastic containers
how much fluoride ingestion causes fluoride toxicity
2.5-10 mg based on body weight
how do you treat fluoride toxicity
by inducing vomiting or feeding milk/raw eggs
indications for fluoride use
xerostomia newly erupted teeth high risk of carie’s no water fluoridation hypersensitive teeth
what are some considerations to keep in mind regarding fluoride
- it isn’t permanent
- varnish has the highest retention of (6 weeks)
- rapid loss occurs 24hrs after application
- teeth need to be clean
- frequency of need is dependant on patient
