If not removed, the tartar will eventually become calcified, which is to say it will harden into a brittle layer. This hardened tartar is known as
Is it normal for tartar to fall off teeth?
If this plaque is not removed quickly, then it hardens into tartar. Tartar is cleaned away by the dentist during your dental cleanings. Most people don't even notice it. However, you might notice it flaking or chipping away sometimes.
Can plaque break off teeth?
Bacteria in plaque produce acids after you eat or drink. These acids can destroy tooth enamel and cause cavities and gingivitis (gum disease). Plaque can also develop under the gums on tooth roots and break down the bones that support teeth.