Summer is a good time for children to get their teeth straightened. The traditional concept has taken into account the reasonable consideration that children are still developing, but following the analysis of the laws of modern clinical medicine science, 20 kinds of malformations or abnormalities of the jaws must be found before the age of 12 that is corrected, do not hesitate! 1, anterior dentition. Commonly known as the “ground,” that is, the lower row of teeth wrapped around the upper row of teeth. It seriously affects the beauty of the face, leading to eating, chewing function decline, increase the burden on the stomach and intestines, thus affecting physical health. Sometimes it also affects pronunciation, ridicule and psychological health. 2.Individual teeth rebound. That is, the individual incisors or two teeth are reversed together, which is extremely harmful. It can affect the normal development of the upper face and the sunken upper lip. Moreover, its potential harm is that it is most likely to lead to temporomandibular joint disorder when children grow up to 30 to 40 years old. 3.Deviated jaw. Due to the tooth decay or missing on one side, eating with the other side for a long time or other reasons, resulting in bilateral facial asymmetry, which seriously affects the child’s psychological health and self-esteem. 4.Serious big buck teeth. Buck teeth patients are very unconfident, so they are afraid to communicate with people, afraid to smile, greatly affecting the academic and social, some children become inferior, should also be corrected in a timely manner. 5, receding jaw. Underdeveloped chin, small chin, commonly known as bird’s mouth. Affects facial aesthetics, but also because the lower row of teeth are too narrowly aligned, limiting the development of the upper row of teeth, also affects the function. 6.Severe crowding of teeth during the teething period. The general mild crowding during the teething period can be observed and not dealt with for the time being; in serious cases, it is manifested as individual or multiple teeth misalignment in all directions; and tooth crowding also hinders the cleaning of local teeth and good for decay, gingivitis, etc. 7, early loss of milk teeth. Premature loss of milk teeth without replacement time will make the local jawbone underdeveloped, the location of missing teeth can be partially or even fully occupied due to the displacement of neighboring teeth, resulting in the misalignment of permanent teeth eruption or ambush obstruction and the formation of dental malformation. 8.Milk teeth retention. When the baby teeth have not fallen out and receded by the time of replacement, the eruption of the permanent teeth in the succeeding shift will be obstructed, resulting in abnormal eruption order, misaligned eruption, or ambiguous obstruction, resulting in malocclusion of teeth alignment and bite. 9. Open-mouth breathing during sleep. This disease is mostly due to nasal blockage or adenoid hypertrophy and other causes of poor nasal breathing, which can cause lip ectropion and lip short and thick, high arched palate face narrowing, anterior protrusion, long face shape, chin recession and back teeth can not bite together. 10.Multiple teeth. There are extra teeth in the oral cavity, especially between the upper incisors. Most of the extra teeth are malocclusion, they occupy the position of normal teeth, resulting in misalignment or eruption disorder of these normal teeth. 11, permanent teeth do not erupt or buried obstructive. Obstructed teeth are teeth that partially erupt or completely fail to erupt and cannot erupt in the future. Incisors are common in childhood. It can be improved by aiding eruption or traction. 12. Snoring during sleep. Snoring will lead to facial deformity, such as narrow face, exposed lower teeth, open lips and teeth, which will seriously affect the appearance of children due to nasal obstruction, incorrect breathing and incorrect bite of upper and lower teeth. 13.Decayed teeth are not repaired in time. The position occupied by the baby teeth becomes smaller due to tooth decay, so that there is not enough position for the permanent teeth to erupt, so there is crowding and misalignment, and even affect the replacement and eruption of the permanent teeth. Therefore, it is necessary to fill the decayed milk teeth. 14.Labial tethering abnormalities. The labial tether is attached between the lateral gums and the alveolar mucosa between the two incisors in the middle of the upper row. If the tether does not recede as the child grows older, it will lead to a large gap between the upper incisors. 15. Abnormal lingual tethering. Congenital developmental abnormalities. The tongue tether is too short, so that the normal movement of the tongue is restricted, and in severe cases, the tongue cannot be extended outside the mouth or cannot touch the upper lip. Affects suckling, phonological speech and articulation. 16.Post-operative cleft lip and palate. After cleft lip and palate surgery is not all right, but must also need a series of orthodontic treatment for several years in order to maximize the good appearance and physiological function. 17. Bad lip habits. This includes biting the lower lip, sucking the lower lip, lower lip pocketing the upper lip, etc. This will cause the upper lip to be too short, open lips and teeth and the lower lip to be sunken in. 18, bad finger sucking habits. Children’s finger sucking behavior persists after the age of 3, which can cause the front teeth to bite together, children’s upper and lower incisors protrude and other deformities, and in serious cases may affect the development of the upper and lower bones and cause facial deformities. 19, bad tongue habits. Tongue out, tongue out, tongue licking, tongue topping, etc. are bad tongue habits, will cause teeth outward misalignment, protrusion, gaps, teeth bite not together or the ground, etc., must be corrected in a timely manner. 20, early loss of permanent teeth. Children grow the first permanent molar, that is, the first major molar. Each person has a total of four upper and lower left and right. Generally speaking, these teeth erupt at the age of six, so they are commonly known as “six-year-old teeth”. The decay rate of “sixth age teeth” is the highest, and the percentage of extraction and the incidence of other dental diseases are higher than other teeth. In terms of function, this tooth is the most important molar, and the loss of the sixth age tooth will easily lead to misalignment of teeth, and the orthodontic treatment will be much more difficult, so we should pay special attention to the protection of the “sixth age tooth”.