The three reasons for the formation of infants and young children to bag day:

1, genetic factors, if the parents of someone is underbite, baby there is the possibility of genetic, the possibility of a third;

2, the improper feeding, the baby teeth underbite family factor is the parents breastfeeding position is not correct, when parents in nursing, bottles, such as get too high, the children will have to put the lower jaw juts out to drink milk, over time, the jaw will be more prominent than upper jaw, formed the jaws;

3, rearing patterns, such as let the baby nurturance often suck fingers, bite, bite lips, tongue and jaw forward bad habits and pacifier use time is too long.

Small make up emphasized: the overall goal of the orthodontic treatment is balanced, stable, beautiful, must be the organic combination of the three, be short of one cannot.If not treated, after deformity happened with the growth of the age, will be more and more serious, the mandibular protrusion and central sag, greatly affect the jaw occlusal balance, stability and beautiful face.