Comparing pneumatic scaling and ultrasonic scaling, pneumatic scaling should be the better one. 1. Pneumatic scaling, as a new type of scaling, has many advantages such as small amplitude and no discomfort. Ultrasonic scaling may cause soreness and pain, which can easily cause discomfort to the person who is scaling his/her teeth. 2. Pneumatic scaling is a pneumatic scaling machine without damaging the gums, using a personalized probe deep inside the gums, on the one hand, can play a role in massaging the gums, on the other hand, can achieve the efficacy of removing dental calculus. It has the advantages of low noise, light vibration, soft process, etc. It is mostly suitable for patients with mild periodontitis and gingivitis. 3. Ultrasonic dental cleaning is through the ultrasonic waves issued by high-frequency vibration, crushing the surface of the teeth of food debris, soft tartar, calculus, stains, plaque and so on and flushed down, and then to achieve the purpose of cleaning teeth. It has the advantages of short cleaning time and good cleaning effect. Pneumatic cleaning and ultrasonic cleaning specific how to choose according to their own situation, it is recommended to go to a regular dental hospital or clinic, by the dentist according to the teeth to choose.