"Before answering these questions, let's look at the order of tooth development and eruption. Children begin to grow their first deciduous teeth at about 6 months, and by about two and a half years old, all deciduous teeth erupt, with deciduous teeth in the upper and lower jaws 10, which is called deciduous dentition. At the age of 6, the first permanent tooth (six-year-old tooth) began to erupt at the end of mandibular deciduous molar. At this time, the upper and lower front teeth begin to be replaced gradually, and the replacement of teeth generally lasts from 6 years old to 12 years old, which is called dentition period. When the two maxillary canines completely erupt and all the deciduous teeth are replaced, they will enter the permanent tooth stage. "
According to Yan Huang, dentition replacement may cause a series of problems, such as crooked teeth, uneven arrangement, crowded teeth, "rabbit teeth", "tiger teeth", "buck teeth", chin deviation, facial asymmetry and so on. , collectively known as malocclusion.
"There are several reasons for children's dentition. The first is genetic factors. Secondly, feeding methods and bad habits will also affect children's tooth development. " Yan Huang said that if the baby lies down for a long time and suckles, it will easily lead to the overgrowth of the child's mandible, which will lead to the situation of "covering the sky above the ground". If children have the habit of biting their lips, sucking their fingers, sticking out their tongues and chewing unilaterally, it will also affect the development of teeth.
Why did the "Yasuda" dentist of a healthy child say that it is not necessary to correct "img _ height =" 320 "img _ width =" 400 "data-src ="//imgq6.q578.com/ef/0702/2cbea 67c097160e.jpg "src? In addition, due to tonsil hypertrophy, adenoid hypertrophy, nasal septum bending and other reasons, children will breathe through their mouths when sleeping. Long-term oral breathing will lead to irregular teeth and narrow dental arch, which will lead to changes in face shape.
A survey of 25,392 children and adolescents by the Orthodontics Committee of the Chinese Stomatological Association showed that the malocclusion prevalence rates of deciduous teeth group, mixed teeth group and permanent teeth group were 565,438 0.84%, 765,438 0.265%, 438 0% and 72.97% respectively, and the total prevalence rate was as high as 67.82%. Therefore, it is necessary to correct children's malocclusion at an early stage.
"The teeth are arranged neatly and the occlusal relationship is good, which is one of the important standards of oral health. Uneven arrangement and poor occlusion will not only lead to insufficient tooth cleaning, but also cause oral problems such as dental caries, periodontal disease and mucosal disease, and may also affect the face value and social interaction. "
How to grasp the timing of correction? Don't miss the best correction period of 12- 16 years old.
Why did the "Yasuda" dentist of a healthy child say that "img _ height =" 355 "img _ width =" 600 "data-src ="//imgq6.q578.com/ef/0702/bb758a 307a 62a747.jpg "src ="/. For children's malocclusion, because it involves dentition development, jaw development and even facial morphology, parents should have the overall concept, so they can neither delay the best correction opportunity nor rush into it. Yan Huang emphasized that there are generally three key points to grasp about the timing of the early callback.
First, deciduous dentition: about 4 years old.
Second, mixed dentition: about 8-9 years old, the roots of incisors are fully developed.
Jaw deformity: 10- 12 years old, before the peak of youth growth, 1-3 years old.
Generally speaking, the best time for orthodontic treatment is after tooth replacement, and the age is between 12- 16. For most malocclusion cases, the permanent dentition of 12 years old is the key time for correction. However, for some patients with severe skeletal deformities, such as ground wrapping and mandibular retraction, early correction is needed. Therefore, we suggest that parents should come to an orthodontist for examination when they find that their children have teeth problems, so as to judge whether early diagnosis is needed. Then for adult patients, correction is not limited by age and can be started at any time.
The sooner you correct it, the better. The tooth changing period is normal. Don't panic.
There is no need to worry about some temporary tooth "deformities" during children's tooth replacement, such as the cracks between the crowns of maxillary incisors (central incisors) and maxillary incisors (lateral incisors) protruding to both sides. This is because when the central incisor erupts, the root of the central incisor is squeezed by the non-erupting lateral incisor, and the crown of the lateral incisor is against the root of the central incisor, which causes the central incisor to tilt to both sides and produce cracks. However, the "brothers" were not separated for a long time. After the lateral incisors erupt, the crowns of the central incisors will also be squeezed. At that time, the two front teeth will gradually move closer to the middle and finally return to the correct position, Yan Huang introduced.
Why did the "Yasuda" dentist of healthy children say that "img _ height =" 288 "img _ width =" 600 "data-src ="//imgq6.q578.com/ef/0702/55 ded2c302c59b.jpg "src ="/A229. It is common for children's front teeth to grow in and out when changing teeth. These are mainly due to the immature development of the jaw, and the newly grown permanent teeth are much larger than the deciduous teeth. It turns out that the space of deciduous teeth can't meet the needs, so there is a contradiction between supply and demand in dentition, and several new permanent teeth have to be wronged. With the development of the maxilla, the maxilla enters the peak of growth and the dental arch will increase. The "home" has become bigger, and the permanent teeth that were originally crowded together will automatically adjust their positions and will no longer be crowded.
Yan Huang said that most cases with crowded dentition can be treated by orthodontics according to the situation after the replacement of deciduous teeth, which can not only shorten the course of treatment, but also save orthodontic expenses and obtain better curative effect. The replacement period of deciduous teeth and permanent teeth can be said to be the "ugly duckling" stage that all children have to go through. Parents should not worry too much. Many cases of crowded dentition can improve themselves after jaw development.
Different orthodontic methods are used for different deformed teeth.
Why did the "Yasuda" dentist of healthy children say that "img _ height =" 386 "img _ width =" 600 "data-src ="//imgq6.q578.com/ef/0702/9216bb55a4649b29.jpg "is not needed to be corrected? According to Yan Huang, there are several corrective techniques to solve malocclusion:
1. Functional correction technology-adjusting the function of oral muscles and affecting the growth and development of teeth and craniofacial bones.
2. Fixed orthodontic technology-brackets are fixed on the teeth, and orthodontic force is applied to control the movement of the teeth.
3. Invisible correction technology-bracket-free invisible correction, which combines computer three-dimensional diagnosis, personalized design and digital molding technology.
Finally, Yan Huang said, "Every child should not pay the price of bad habits at the age when happiness is blooming. Parents should pay attention to their children's oral habits and problems. Early detection, early treatment and timely intervention may get twice the result with half the effort, which can avoid the severity and complications of deformity and make the later treatment easier. And in early treatment, children's tissues have quick response, strong adaptability, short correction time and good effect. "