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▶️▶️#DidYouKnow: The average woman smiles around 62 times a day!

— Ebenezer House (@Swindondental) October 12, 2017

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Here’s a child’s skull from India. An estimated 8-9 year old. the maxilla and mandible have been cut to show eruption of adult teeth

The curve on a graph, first described by Robert Stephan in 1943, showing the fall in pH below the critical level of pH 5.5, at which demineralization of enamel occurs following the intake of fermentable carbohydrates, acidic liquids, or sugar in the presence of acidogenic bacteria. After consumption, there is an elimination of the acid and a return to normal saliva or plaque pH, at which point repair of any destruction of the enamel structure takes place (remineralization). Repeated intakes of fermentable carbohydrates cause the low pH to be maintained for longer periods, thereby not allowing remineralization to take place.

Did you know?

Decalcification of teeth occurs when the pH in the oral cavity is less than 5.5 Below the so-called “critical pH” at which point it is postulated enamel built with hydroxyapatite dissolves.

Fluoroapatite has a critical pH of 4.5

Fluoroapatite is present in human teeth that have been exposed to fluoride ions, for example, through water fluoridation or by using fluoride-containing toothpaste. The presence of fluorapatite helps prevent tooth decay or dental caries, it makes tooth structure more resistant to additional caries attack.

It takes only 1 to 3 min to decrease pH below 5 of plaque exposed to sugar.

It takes 30-60 minutes for your saliva to get you back to the safe zone.