Understanding demineralisation and remineralisation ?
Normally your mouth, teeth and saliva sit at a neutral pH of about 7. Everybody is happy, teeth are bathing comfortably in saliva, life is good.
You get peckish, indulge on a little sugary snack and the bacteria go wild as this is their favourite food.
As they digest the sugar, they release acid that causes the pH in your mouth to drop (within just 1-2 minutes) and this in turn causes calcium and phosphate (our most important tooth minerals) to be lost from the enamel surface of our teeth.
Luckily we are equipped with our own defence to fight this, in the form of saliva.
This is secreted in generous amounts whenever we eat; it helps us digest food and reverses the demineralization- a process called- "Yes, you've guessed it 'remineralisation' .
Saliva helps wash away and neutralize the acid, causing the pH to rise over the next 30-40 minutes, on its way back to the neutral resting level; all the time minerals are being added back into our beloved teeth to reform them.
This remineralisation can actually take anything from 20 minutes to two hours to occur depending the factors that affect your Stephan Curve
So, in your mouth, there exists this ongoing battle between good and evil; between demineralization and remineralisation. Your teeth demineralise then remineralise every time you have anything to eat or drink.