Whistling teeth is actually a folk name, but very graphic. When you blow a whistle, your mouth needs to be beeped, and your teeth naturally tilt forward, which is actually a whistle tooth. When the upper or lower teeth are tilted forward and tilted very much, they may be whistling teeth, which in orthodontic terminology is called lipward tilt. For the correction of whistling teeth, the patient’s specific occlusal and facial conditions should be taken into account, and photographs or X-rays should be taken to see if there is tension in the chin in the frontal view of the patient, because the chin muscles are very tense when the mouth is closed due to the presence of whistling teeth. The patient’s lateral appearance is also combined with the height of the nose, lips and chin to determine if the patient’s mouth is protruding, and the bite situation in the mouth, including the crowding of the teeth and the patient’s lateral appearance, to make a comprehensive orthodontic plan. Some patients with both crowding and protrusion may have to take the extraction approach. If the facial appearance is basically normal, with only a little whistling teeth and some gaps in the mouth, the whistling teeth can be coordinated by means of dental arch expansion or a small amount of adjacent surface de-glazing, etc. to bring the whistling teeth upright.