anticaries activity of fluroides

[sania]

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the anticaries effect of FL is least likely realted to which of the following?
1)ion exchange
2)decreased solubility
3)faciliation of remineralisation
4)its presence during enamel formation
5)activation of plaque ploysacchride hydrolysis

can u guys ans explain this..please

 

[bddsgirl]

the anticaries effect of FL is least likely realted to which of the following?
1)ion exchange
2)decreased solubility
3)faciliation of remineralisation
4)its presence during enamel formation
5)activation of plaque ploysacchride hydrolysis

can u guys ans explain this..please

According to me it is due to Decreased Solubility. This is due to formation of fluorapatite instead of hydroxyapatite. Fluorapatite is a strong crystalline structure and is almost insoluble.

 

[pbkal]

the anticaries effect of FL is least likely realted to which of the following?
1)ion exchange
2)decreased solubility
3)faciliation of remineralisation
4)its presence during enamel formation
5)activation of plaque ploysacchride hydrolysis

can u guys ans explain this..please

it should be either (3) or (4).floride does not promote remineralization.

 

[bddsgirl]

the anticaries effect of FL is least likely realted to which of the following?
1)ion exchange
2)decreased solubility
3)faciliation of remineralisation
4)its presence during enamel formation
5)activation of plaque ploysacchride hydrolysis

can u guys ans explain this..please

Hey Sania,

Sorry Dear I completely read the question wrong......actually I answered the most likely mechanism.....but the question was the least likely....

Ok SO according to me the least likely is 5. Activation of plaque polysaccharide hydrolysis........

Because Fluoride has all of the other functions because Fluoride does play a very important role in :
IOn exchange, decresed solubility, and it surely does take part in remineralization.....and if it is present in amounts of 1 ppm at the time of enamel formation then it forms hard and less soluble fluorapatite crystals.....

 

[f.khan]

I agree that the correct ans is 5 but how does it promote remineralization? Any reference or explanation?

 

[bddsgirl]

Hey F.khan,

You can check this link http://en.wikipedia.org/wiki/Fluoride_therapy

And then I also remember this from my school.......

Thats why GIC Fuji Cement contains fluoride ions.........and it is applied after removal of soft caries and applied on hard caries to get them remineralized