The role of fluoride in caries prevention Flashcards
How does fluoride prevent caries?
-Fluoride present in the fluid at the plaque/tooth level interface promotes remineralisation
-The fluoroapatite formed is less susceptible to demineralisation
-TOPICAL EFFECT BETTER THAN SYSTEMIC EFFECT
-Fluoride may also have an effecr
t on bacteria and metabolic pathways resulting in less acid being produced
-Maintain elevated oral levels of fluoride for as long as possible (little and often)
-Fluoride most effective on early lesions.
There are lots of resources and paper studies on these slides.
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What is SDF?
SDF is an inexpensive, non-invasive medicament that is applied topically. It is 38% SDF, a silver fluoride salt made soluble in water through the addition of ammonia. SDF received Food and Drug Administration approval in 2014 as a device for treating dental hypersensitivity.
Why does SDF turn your teeth black?
When the silver in SDF is applied to a tooth, it oxidizes and leaves a black stain on the damaged cavity portion of the tooth (it does not stain healthy enamel). It can also temporarily stain any tissue surfaces it contacts (for example, lips or gums). For gums and tissue in the mouth, the staining is temporary.
What level of fluoride is in some water supplies?
0.8-1ppm.
What dose of fluoride tablets can be given to (can be given to high risk children but it is not a public health measure):
- 6 months to 3 years of age
- 3-6 years of age
- Over 6 years of age.
- 0.25mg
- 0.5mg
- 1mgF.
What is the caries reduction by using fluoride tablets or fluoride mouth rinses?
Tablets- 50% reduction in deciduous dentition and 30% in permanent dentition.
Mouth rinses- 30% reduction.
What is the concentration of weekly and daily fluoride mouth rinses?
Daily= 0.05% 227ppmF Weekly= 0.2% 909ppmF.
Is daily rinsing more effective than weekly rinsing?
Daily rinsing is slightly more effective than weekly rinsing but more expensive.
What is the concentration of sodium fluoride in fluoride varnish?
22,600ppm (50mg/ml).
How does fluoride varnish work?
The colophony resin hardens in contact with saliva to maintain contact of fluoride with the tooth.
What are the kinetics of fluoride absoption?
- Rapid absorption on tooth surface
- Increase in fluoride content of enamel up to 77% after a single application
- Progressive release of fluoride over several months.
How does calcium fluoride work?
If there is an acid attack there if a release of fluoride ions to aid in remineralisation.
What is acidulated mouthwashes?
They are of a low pH. They stimulate mild demineralisation on tooth surfaces. The presence of fluoride remineralises the tooth. It is an effective means of getting fluoride into teeth and better than non-acidulated rinses.
Name an example of fluoride boosters.
CPP-ACP (casein Phosphopeptide- Amorhpous Calcium Phosphate). Used to be adjunct to fluoride but now supplied with fluoride. Can be used at home or in office in trays- useful in markets with no access to high fluorides.
