Tartar is not a disease per se, it is a common oral problem that has its own particular cause of occurrence, and that is poor oral hygiene. Calculus is a mineralized or calcified plaque deposit that builds up on the surface of the teeth. If plaque is not removed properly, the plaque that accumulates on the tooth surface will deposit minerals in the saliva and become calculus that cannot be removed by brushing. Food debris, soft tartar and plaque in the mouth are the basis for the formation of tartar. Therefore, it is necessary to pay attention to timely oral hygiene and timely removal of plaque to avoid the formation of tartar. There are some parts of the mouth that are prone to tartar formation. They are usually areas that are not easily brushed, such as the neck of the teeth, and the lingual side of the front teeth of the lower jaw and under the gums. These areas are not easy to clean and are also areas where phosphates tend to form and collect, making it easy for calculus to form. Calculus is usually soft at first and has a yellowish or yellowish appearance. However, when it is present on the surface of the teeth for a long period of time, it can cause bleeding of the gums, and over time it can become hard and calcified and eventually form black plaque. When calculus appears on the teeth, it is recommended that it be removed in a timely manner, as it can easily cause periodontal tissue disease over time and can cause serious irritation to the gums. The usual way to remove calculus is through dental professional cleaning. Oral health measures such as maintaining good oral hygiene, reducing plaque buildup and using anti-tartar toothpaste are beneficial in reducing or preventing the formation of calculus.