Ultrasonic and sandblasting are important methods for dental cleaning in dentistry. 1. Ultrasonic Cleaning: Poor oral hygiene can lead to periodontal calculus, and ultrasonic cleaning of the calculus on the surface of the teeth can restore the original luster of the teeth. Ultrasonic cleaning is to dislodge the calculus deposited on the surface of the teeth that cannot be removed by brushing. Scaling only washes away the calculus around the teeth, and does not whiten the color of the teeth themselves. Ultrasonic scaling focuses on the calculus around the teeth, which is disintegrated and dislodged by the vibration of ultrasonic waves, thus improving the periodontal condition. 2. Sandblasting: Sandblasting is an important method for cleaning pigmentation. Teeth with pigmentation will not have a smooth surface, easy to deposit plaque. Sandblasting is to make fine sand particles sprayed at high speed, relying on fine sand particles on the surface of the teeth pigment impact friction, to remove the surface of the teeth small pigment. Many teeth between the gap between the toothbrush bristles is difficult to reach into the part, sandblasting can also enter, relatively speaking, can be cleaned without dead angle of any surface of the teeth exogenous pigmentation. Patients are advised to go to a regular dental clinic in time to ensure the health of their mouth.