A member asked:

What causes plague to form on the tooth/gum?

3 doctors weighed in across 2 answers

Bacteria : Germs love to colonize the human mouth. It's wet, warm, dark, and exposed to air as well as airless conditions. Plus, there are nutrients from the food and saliva. Plaque forms constantly, as a biofilm on the tooth surfaces. As many as 1000 species of bacteria, in virtually infinite combinations must be removed twice a day. Proper oral hygiene is necessary to keep the process in check.

Answered 10/30/2012

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Living..: Living causes plaque (not plague) to form on teeth and in you mouth. It comes from food, air water, saliva and just about anything. It forms immediately after you've brush your teeth. It is a way of life, but the main thing you don't want the stuff to be on your teeth for a long period of time. Basically...Brush and floss regularly and even if you have a little plaque..No big deal.

Answered 1/13/2016

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