The timing is different for each person; the best timing is different; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is different for each person; the most suitable timing is determined by a specialist. The main cause of the disease is heredity; only the bad is passed on, the good is not passed on; the secondary cause is sugar greed; getting worm teeth is a big problem; bad habits can lead to disability; biting the upper lip, the sky is covered; biting the lower lip, the bird’s mouth is shaped; licking the teeth, the teeth are open; sideways chewing, the face is skewed; sleeping with the mouth open, the buck teeth show.