When there is thick tartar on the teeth, ultrasonic scaling is preferred, through high-frequency oscillation, large mineralized calculus can be loosened from the surface of the teeth, fall off, and be discharged to the outside of the mouth with the liquid flushing in the mouth. The manual scraper can also separate calculus and soft scale from the surface of the teeth, but compared with the ultrasonic scaler manual scraping is slower, easy to cause the patient to open the mouth for too long, chewing muscle groups fatigue. When there are still some small tartar and pigment on the teeth, sandblasting can be used to make the surface of the teeth become smooth, remove tartar and pigment, and at the same time, attention should be paid to timely brushing of the teeth after meals and gargling chlorhexidine and other mouthwashes, to avoid the buildup of soft tartar on the surface of the teeth to mineralize and become stones.