Change of teeth in children - the formation of the chewing system
dentition in children - is sufficiently long, but are usually painless process.Teething and installation of permanent teeth is an important step in the development and correct bite the chewing system.Starts replacement of teeth in children aged 5-6 years, comes to an end - 11-12 years.And wisdom teeth erupt in the following 20 years.
change of milk teeth in children
correct and timely dentition contributes to normal root resorption of milk teeth.This process begins at age 4 and lasts until the change of teeth in the last 11-12 years.The gaps between the baby teeth Milk teeth - how they are formed? increase, then turn your teeth become loose and fall out.Delayed resorption of roots of deciduous teeth, especially treated, leads to disruption of the process of formation and eruption of permanent teeth, and promotes the development of a variety of dentoalveolar anomalies.
By 11-13 years of all the temporary teeth (there are 20) are replaced by permanent.And up to 20 years erupt even further from 8 -12 permanent teeth.In all, an adult of 28 (no wisdom teeth) up to 32 teeth.
Each jaw is located on the 4 incisors, 2 canines, four small molars or premolars and molars 4-6 or molars.Wisdom teeth are located in the dentition last, not always erupt, sometimes it is not enough space in the dentition.If the wisdom tooth wisdom tooth - remove and not to suffer little space, it can grow properly, creating a lot of problems.
Terms of dentition in children
Permanent teeth erupt in children in the following terms:
- erupt in 5-6 yearsfirst molars and molars;
- in 7-8 years - central incisors;
- in 7-9 years - lateral incisors;
- 9-10 years - first premolars - they substitute dairy - central molars;
- in 10-11 years - fangs;
- in 11-12 years - second molars - replace dairy - side molars;
- in 12-24 years - the second molars;
- after 20 years - the third molars, or "wisdom teeth."
mineralization of permanent teeth
major importance for the future viability of the permanent teeth is the process of mineralization.The first year of life the child has tubercles calcify crowns first molars, as well as the cutting edge of incisors and canines.In the third year of life begins mineralization premolars, the fourth - the second molar.
tooth development begins with the crown and moves towards the vine.He penetrates to the root has not yet formed, the development of which ends just 3-4 years after eruption of the tooth.At the age of about 10 years only mineralized roots of incisors and first molars.Mineralization of the roots of canines end to 13 years, and the second molar - even later.
dentition in children and the formation of an occlusion
order of dentition in children is very important for the proper formation of the jaws, as it is the basis for the proper formation of upper and lower jaws, including bite.Since the eruption of the first permanent molars formed interchangeable bite, which is the transition from milk to a constant.The removable bite chewing efficiency is reduced.
during the change of bite hard lumps develop joint temporomandibular joints.Teething posterior teeth (premolars and molars) is accompanied by increased growth of the jaw bones, which leads to the transformation of semi-circular rows of teeth in poluelipsovidnuyu form in the upper jaw and parabolic - on the bottom.
matters as the procedure for replacement arrangement (they are replacing dairy) and additional (this new teeth, which do not replace milk) teeth.The total length of dentition replacement teeth (incisors, canines, and premolars) on the upper jaw 0.5 mm longer than the length of the dentition of the corresponding deciduous teeth.In the mandible, the length, in contrast, is less than 2 mm, which leads to the possibility of displacement of the first molar of the mandible forward and their diverging surfaces chewing gum surface similar teeth on the upper jaw.
more teeth (permanent molars) are placed due to the growth of the jaws.The rudiments of the second and third molars of the mandible are thicker in its branches.The branch with the front side resorbed, while its rear surface is new bone formation.As a result of the growth of the lower jaw is long and there is space for the eruption of molars.The upper jaw length increases alveolar bone by bone growth on the outer surface.Simultaneously resorption (resorption) of bone on the inner surface of the alveolar bone.These two opposing processes determine the formation and growth of the jaw bones and, ultimately, the formation of the entire masticatory apparatus.
dentition in children teeth in children - any abnormalities need treatment? - this is a complex physiological process, which resulted in not only the permanent teeth appear, but also formed a correct bite.