What is Gastritis? Toothpastes are used everyday on our teeth, our mouth it an excellent environment for bacteria to grow, thus allowing them to multiply and to become a visible problem. Everyday dental hygiene will eliminate some of the buildup but other areas will still have significant buildup mostly between the gums, tooth surface and hard to reach places. When certain bacteria comes in contact with toothpaste in the mouth they release acid that damage gums and tooth enamel, which can lead to bleeding and inflammation of your gums, and a persistent and unpleasant door in the mouth. As the inflammation depends, bone tissue may be affected, which can lead to tooth extraction.