Dental calculus is hard tissue formed around the teeth by the solidification of bacterial tissue and is mainly divided into supragingival and subgingival calculus. In the process of cleaning calculus, it is also divided into two methods: cleaning supragingival calculus and cleaning subgingival calculus. The first method is mainly ultrasonic scaling, which usually costs around 200 RMB. The second method is the cleaning of subgingival calculus, which mainly takes ultrasonic subgingival scaling as well as subgingival scraping and root planing, and the price is generally around $50 per tooth and around $2,000 for a full mouth. Tartar cleaning can also be done by hand, and the price is generally around $100 for supragingival calculus when taken by hand, but relatively speaking the ultrasonic scaling method is better.