Answer by Feras · Jun 11, 2010 at 12:30 PM
From Yahoo! answers:
In terms of oral health it is much better to do it before because it gets rid of plaque which is the number one cause of tooth decay, gingivitis and periodontal diseases. But more importantly the reasoning behind this is that if you have acidic foods/drinks such as orange juice then you will be lowering the pH of your mouth (ie. your mouth will be acidic), a low pH is a bad thing for your teeth as it causes deminerlization. Imagine that your tooth is a reservoir of minerals, now you have just had breakfast with all the orange juice and sugary cereals and jam etc and the acid level in your mouth is very high. Your tooth is essentially being dissolved! If you brush your teeth immediately after this, you are brushing away the minerals from your teeth and eventually your teeth are going to become very sensitive! By brushing BEFORE you have breakfast you are disrupting the plaque biofilm and creating clean tooth surfaces whilst also minimizing the risk of tooth loss by erosion. Source(s):I'm a dentist
You should brush BEFORE having breakfast.
Answer by AppleHack23 · Jun 12, 2010 at 02:01 PM
After breakfast, why clean the dirt of your teeth if its just going right back on a few minutes later? Also, toothpaste can affect the way your breakfast tastes. Ever have orange juice after brushing your teeth?
Answer by Razor512 · Sep 08, 2010 at 12:50 PM
I usually brush after eating breakfast. I don't like doing it before because it ruins the taste of food.
Because of the properties of toothpaste (even unflavored ones) it overstimulates taste buds and has various effects, this causes food to taste bland when you eat after brushing.
It is kinda like if you are drinking a cup of hot chocolate and you decide to take a bite of a chocolate bar or some kind of candy, you will notice that the drink suddenly became almost bitter. It takes around an hour for the these side effects to go away completely.
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