sorry for sending without subject,regarding flourides

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From: Kanika Kohli <kanika_sahil@...> " " < > Sent: Friday, 24 February 2012 2:07 PM Subject: Fw:

Hi EbtessamI exactly dont know how to calculate all this and is very much confused with it but what i have come to know by now isaccording to Delivering better oral health document it is written flouride tablets are available as 500microgram and 1mg flouride level.NaF 1.1 mg tab=5ooug F,NaF 2.2 mg=Img F.Below is some info regarding percentages provided by Dr.Smriti1000ppmF = 1mgF/ml so we need to know how many mg 'fluoride' is present in any formulation to be able to convert it into parts per million. Now 0.05% of 'Sodium Fluoride' contains only 0.023% fluoride. Which means 0.23mgF/ml hence 230ppm fluoride.0.2%NaF contains 0.09%F = 0.90mg/ml = 900ppmFDuraphat is 5% NaF, contains 2.26%F, F=22.6mg/ml =22600ppmFAPF gel contains 1.23%F, F=12.3mg/ml = 12300ppmF2%NaF contains 0.92%F, F= 9.2mg/ml = 9200ppmF8% SnF contains 1.95%f F= 19.5mg/ml = 19500ppmfI know this sounds confusing but most formulations have other components

apart from fluoride. So you need

to learn the % fluoride present in each formulation to be able to calculate the ppmF.I've provided the concentrations of some of the most commonly used fluoride formulations. It should be sufficient for the exam. But please do check the past questions for any other formulations that might have been asked and/or the common fluorides used in u.k. Some of them are given in the pink book.Thanks and regardsKanika