1, odontogenic: mostly caused by local obstacles, showing simple anterior crossbite, small reverse coverage, neutral molar relationship or starting to close. The size and shape of mandible are normal, the relationship between maxilla and mandible is normal, the mandible can retreat to tangential relationship, and the face is basically normal.

2. Functional type: functional hyperextension of mandible and crossbite of anterior teeth, mostly caused by poor breastfeeding posture. The size and shape of the mandible are normal, and the mandible can retreat to the incisor-incisor relationship, also known as false mandibular protrusion.

3. Osteogenic type: mostly caused by genetic and disease factors. In addition to the malocclusion of the anterior teeth, the malocclusion is large, the molars are near the middle, and there is jaw deformity, which is characterized by long mandible, short mandibular branches, blunt mandibular angle, underdeveloped maxilla, prominent forehead, inability to retreat on its own, facial depression, and sometimes opening and closing deformity.

Generally speaking, teeth on the ground may be caused by three reasons:

1, which is caused by genetic factors. If one parent is wrong and deformed, the baby has genetic possibility, and this possibility accounts for 1/3.

2, improper feeding methods, the family factor of infant deciduous teeth is the incorrect feeding posture of parents. When parents are feeding, if the bottle is held too high, the child must stick out his jaw to drink milk. Over time, the mandible will protrude more than the maxilla, forming an inverted jaw.

3, improper parenting methods, such as letting the baby develop bad habits such as often sucking fingers, biting lips, biting things, spitting out the tongue, mandibular protrusion, using pacifiers for too long.

Dibaotian dentistry correction

The principle is to remove the cause early and correct it early to prevent the further development of deformity. To receive treatment in early childhood, it is only necessary to simply wear an appliance to correct it. But if it is not corrected until adulthood, it will be corrected by surgery. Tooth deformities like Yasuda should be found and treated early. Generally speaking, it is best to treat and correct before changing teeth at the age of 12. Most 12-year-old people who change their teeth need surgical correction. After the tooth replacement period, not only the best period of correction was missed, but also the normal development of oral cavity and jaw was seriously affected. Because the face stops developing, tooth deformity leads to facial overgrowth, which not only affects the chewing function and pronunciation function of the mouth, but also has a great impact on the child's face shape. Therefore, the earlier the plot appears, the better.

Ground-covered teeth are common developmental deformities of teeth and maxillofacial region. Malocclusion not only affects facial contour, but also affects diet and language. If you find the symptoms of this kind of tooth deformity, you must receive orthodontic surgery in time, which will receive good results.