Teeth

The teeth indicates the whole of the phenomena concerning the formation, the growth and the eruption of the Dent S through the Gencive, and, more particularly their installation on the arcade.

The term of teeth is often used in the current language to indicate the number, nature, and the provision of the Dent S of a Animal. However this meaning incorrect, is undoubtedly contaminated by the word English teeth . It is thus advisable to prefer to him the word Denture .

At the Mammalian S, there are often two teeth, one appearing as of the weaning, consisted of teeth baby , the other being completed when the Mâchoire S cease growing.

Teeth at the man

Two teeth follow one another.
  • the first is held between 6 months and approximately 3 years. It leads to the installation of the temporary teeth baby or teeth.
It is generally a lower Incisive which appears in first, quickly followed of the 7 other incisors. Then the first molars appear, then the canines, and finally the second molars.
  • the second is held between 6 years and approximately 13 years (without taking account of the wisdom teeth, which can appear between 16 and 25 years, but not always). It leads to the installation of the permanent teeth or final teeth.
The first permanent teeth to appear are the first Molaire S (also called teeth 6 year old ). Almost at once the temporary incisors start to fall, and the permanent Incisive S make their eruption. Then the order is not always systematic. Between 9 and approximately 11 years, the Canine and the Prémolaire S will make their eruption. Finally they are the second molars (also called teeth 12 year old ).

At the man, teeth with the following final composition, by dental arch, of the axis médial to the side axis: 4 incisors, 2 canines, 4 premolars, 6 molars.

Ages of installation of the final teeth

  • Girls:
    • First molars: 6,1 years (between 5 years 1 month and 7 years)
    • lower Incisors: 6,3 years (between 5 years and half and 7 years)
    • upper Incisors: 7,2 years (between 6 years 4 months and 8 years)
    • First premolars: 10,1 years (between 8 years 7 months and 11 years 8 months)
    • Second premolars: 10,9 years (between 9 years 2 months and 12 years 8 months)
    • Second molars: 11,9 years (between 10 years 3 months and 13 years 8 months)
    • Canine: 10,5 years (between 9 years 7 months and 11 years 2 months)
  • Boys:
    • First lower molar: 6,3 years (between 5 years 5 months and 7 years 3 months)
    • lower Incisors: 7,1 years (between 5 years 9 months and 8 years 8 months)
    • upper Incisors: 8,1 years (between 6 years 8 months and 9 years 9 months)
    • First premolars: 10,6 years (between 8 years 11 months and 12 years 4 months)
    • Second premolars: 11,3 years (between 9 years 7 months and 13 years 2 months)
    • Second molars: 12,4 years (between 10 years 9 months and 14 years 1 month)
    • Canines: 11,2 years (between 9 years 6 months and 13 years 1 month)

It is important to supervise the correct installation of the final teeth. When these teeth make their eruption, it is time for example to stop sucking the inch.

If it is not done correctly, one will be able to help it thanks to the port of an apparatus orthodontic. However one should not worry too early: a temporary obstruction is very frequent. Indeed the width of the premolars is higher than that of the temporary molars, which will make it possible to recover place.

In the same way, it is rather frequent that the permanent incisors appear temporary incisors behind. In this case, one helps the baby teeth to fall and the final teeth can take again a correct position.

See too

Simple: Teeth Zh-min-nan: Khí-lia̍t

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