Aside from genetic factors that influence tooth decay, almost all other tooth decay causes are fully preventable. By simply making changes to your diet and having a more strict oral hygiene routine, you can almost surely prevent tooth decay from happening to you.
The basic concept it this; if you can introduce more tooth building minerals into your mouth on a daily basis than you are losing from tooth decaying acids, your tooth enamel will become stronger day to day instead of deteriorating. So if you just eat foods that are good for your teeth (and consequently your overall health), reduce your intake of foods that damage teeth and take oral hygiene more seriously, you will be on the right path to not only preventing tooth decay, but also reversing any early decay to tooth enamel that has already begun.
In this section you will find tooth decay prevention tips such as: