Gingival calculus is actually tartar, which can be removed by supragingival cleaning and subgingival scraping. Tartar, also known as calculus, is deposited on the surface of the teeth that have been mineralized or are being mineralized plaque and soft tartar. In most cases, tartar adheres to the tooth surface and cannot be removed by brushing, but in a few cases, some tartar may fall off by itself. Tartar can be categorized into supragingival tartar and subgingival tartar according to its distribution site. Supragingival tartar is mainly removed by ultrasonic scaling, which vibrates the edges of the tartar where it meets the surface of the tooth, thus separating the tartar from the surface of the tooth and breaking it up, and rinsing out the treated tartar by using the sprayed water mist. Subgingival periodontal pockets of plaque, tartar because it can not be directly seen, usually by manual scraping removal, removal relies on the doctor’s hand, if necessary, the flap surgery under direct vision to remove tartar, trimming. Scaling is conducive to maintaining oral hygiene, avoiding other systemic diseases induced by poor oral hygiene, and contributing to general health. Therefore, it is recommended that teeth be cleaned every six months to once a year to benefit oral health.