Tartar is divided into supragingival tartar and subgingival tartar, with supragingival tartar requiring scaling and subgingival tartar requiring scaling. Tartar, also known as tartar, is a build-up of food debris or soft tartar around the teeth that is not removed in time after eating and forms tartar under the calcification of saliva. If left untreated, it can cause red, swollen and bleeding gums or damage to the alveolar bone, resulting in loose teeth. Tartar is divided into supragingival tartar and subgingival tartar, depending on where it is attached to the teeth. Supragingival tartar is tartar that is above the gums, visible to the naked eye, and requires ultrasound removal, also known as scaling. The frequency of the ultrasound is important; too little will not remove tartar and too much may cause dental discomfort. Subgingival tartar is attached to the root surface below the gums and can be very harmful to the teeth, in some cases it may cause resorption of the alveolar bone or destructive resorption of the tooth roots and requires subgingival scaling to remove it. After the removal of subgingival tartar, root surface leveling of the tooth is required to avoid causing reattachment of tartar. Therefore, supragingival tartar requires ultrasonic removal, or scaling, and subgingival tartar requires scaling to remove it.