The etiology of large dental calculus is complex, mainly related to mineral deposition and plaque accumulation, etc. Interventions can be made through general treatment, surgical treatment and other treatments. 1. General treatment: maintain good oral hygiene, rinse your mouth after meals, brush your teeth in the morning and evening; eat less sugary food and more fiber-rich food. 2. Surgical treatment: For large dental calculus, supragingival scaling and subgingival scaling can be used. Calculus is an important cause of periodontal disease. Removing calculus is important for maintaining periodontal health and treating periodontal disease. Therefore, it is recommended that teeth should be cleaned regularly, such as every six months to a year to the hospital, and if periodontal disease exists, the frequency of cleaning can be increased according to the doctor’s instructions. When symptoms of oral diseases appear, it is recommended to consult a doctor as soon as possible for checkups and corresponding treatments under the doctor’s guidance.