What's the "earth and sky"? Many children will easily form the "earth and sky" due to their unreasonable feeding habits, which will affect their beauty. So how does the earth and sky form? How old is the earth and sky best corrected?
Under normal circumstances, when the upper and lower teeth are occluded, the upper front teeth should be occluded outside the lower front teeth. If the opposite is true, the lower front teeth should be occluded outside the upper front teeth and the mandibular protrusion, which is called "anterior teeth anti occlusion" in medicine, commonly known as "ground Baotian", also known as "pocket teeth".
Baby's tooth development, not only related to the chewing and digestion function, but also on its face. "Di Bao Tian" not only affects children's tooth development, but also affects the whole mouth, and even leads to face changes, so mothers should pay more attention to it.
The cause of the formation of Tiandi
1. Genetic factors. If one of the parents is anti jaw, the baby has the possibility of inheritance, which accounts for 1 / 3;
2. Improper feeding. The family factor of the baby's deciduous teeth is the incorrect feeding posture. If the mother holds the bottle too high, the baby must extend the lower jaw to drink milk. As time goes by, the lower jaw will be more prominent than the upper jaw, forming an anti jaw;
3. Improper parenting. For example, let the baby develop the bad habits of sucking fingers, biting lips, biting objects, spitting tongue, mandible extension and the use of nipples for too long;
4. It is caused by local obstruction in the period of tooth replacement. The retention or movement of deciduous teeth, the early loss of upper molars, and the posterior displacement of upper permanent teeth can all result in the "ground covering the sky";
5. Disease. For example, if the baby has chronic inflammation of palatine tonsil or lingual tonsil, long-term stimulation of mandibular protrusion will cause anterior crossbite over time; patients with cleft lip and palate often have maxillary hypoplasia, which is easy to cause anterior crossbite and near middle malocclusion, and the lower jaw will become prominent; rickets patients and endocrine diseases are likely to have "ground covering the sky".
Generally speaking, most of the deformities of the baby's teeth need to be corrected after the teeth have been changed, that is, the permanent teeth have been aligned, while "dibaotian" can't be treated after the teeth have been changed, so it needs to be treated as soon as possible.
If the upper teeth are not arranged in order, girls have the best opportunity to do orthodontics before menarche, and boys are about 12 years old. However, if there is "earth covering the sky", the treatment time should be earlier, because the growth of jawbone, the bone around the teeth, is earlier than the development of the body. The development of jaw is early, so the growth and development of the whole mouth, face and jaw will be affected.
How old is the correction
Phase I: 2-5 years old
The treatment stage of deciduous stage is about 2-5 years old, and the best treatment age is about 4 years old. At this time, the baby's permanent teeth have not erupted, and the root of the primary teeth have not been absorbed. During the treatment, only under the guidance of the doctor, simple methods such as wearing an active appliance, correcting bad oral habits and so on, can be completed within 3-6 months.
Stage 2: 6-12 years old
This time is the period of occlusal replacement. If there is reverse jaw in the period of occlusal replacement, the treatment time should be 6-12 years old, and the best treatment age should be about 9 years old. At this time, it is only the reverse jaw of teeth, which is relatively easy to correct. According to the condition of children's reverse jaw, we can use movable and fixed appliance, and even cooperate with external force to correct teeth.
Stage 3: after 12 years old
If the reverse jaw is not corrected in time in the period of tooth replacement, and the correction is generally after the age of 12 in the period of permanent teeth, a more complex appliance is needed, which is difficult, time-consuming, expensive, and the improvement of the face shape is not obvious. The serious cases can only be corrected by orthognathic surgery.