Definition: Calculus, also known as tartar, is the hardened residue that forms on your teeth when plaque is not removed. Plaque can be removed by brushing twice a day and flossing daily.
Also Known As: Tartar
Glossary Definition of Dental Term - Calculus
From Tammy Davenport, former About.com Guide
Updated: June 6, 2007
About.com Health's Disease and Condition content is reviewed by our Medical Review Board
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