Teeth Temporary teeth

Teeth is a solid bony members positioned in the jaws, upper and lower, and Age is positioned within the bone cavity and between temporary and permanent.

A. Temporary teeth:
The 20 older, where each decoder 4 breakers, Naben, and four teeth, begin to
emerge at the age of six months, and ends with their appearance at the age of two years. The following table shows the time of the appearance of the teeth:
- Central incisors 6-8 months
- Lateral incisors (Alduahl) 8-10 months
- Molars first 12 months
- 18 months fangs
He notes that the teeth in the lower jaw appear before teeth in the upper jaw.

B. Permanent teeth:
Number of teeth in humans, 32 are not distributed on the upper and lower jaws, an average of 16 are not in each jaw. It per jaw:
- Four breakers
- Canine
- Four primary teeth
- 6 Odharas

And begin to appear at 6 years of age at the expense of milk teeth, where each tooth appears instead of milk except age mills (molars).
The last thing shows, including the so-called "wisdom teeth" between 17-30 years old, and the following table shows the time of the appearance of every age:
- First molars appear at 6 years of age
- Central incisors appear at the age of 7 years
- Lateral incisors appear at the age of 8 years
- Front molars first show at the age of 9 years
- Second front molars appear at 10 years of age
- Fangs appear at the age of 11 years
- Second molars appear at 12 years of age
- Odharas mind appear between 17 - 30 years old

Positioned each tooth within the bone cavity narrows as we head toward the bottom, and there are between age and vascular membrane cavity bloody, is an extension of the plate gum.

Installing Age:

Age consists of two parts: the crown, and root, and their neck. The tissue is made up of 3 layers:

A. Crown area "Crown":
It consists of 3 layers are from the inside out:
- Pulp "Pulp"
- Ivory "Dentine" هوالجزء delicate Age and color tends to yellow.
- Enamel "Enamel" and Hoaljze is delicate, white in color, covers the crown.
B. Root zone "Root":
It consists of 3 layers are from the inside out:
- Pulp
- Ivory
- Mortar "Cement" and bone Homadh covering root and cervical Age.

And implanted teeth in cavities in the jaws infiltrated the gums, and take the form of arc three quadrants, and the upper teeth extend to post-tooth lower in the case of plate jaws on each other, so the parties molars upper hand facial muscles circular while parties on the one hand mouth sharp. The opposite is true for the lower teeth.

Dental functions:

Lead teeth several important functions are:
1. Chewing in order to break up the food and facilitate the process of swallowing and digestion.
2. Appearance teeth earn face a beautiful sight, and working on the consistency of the members face.
3. Pronunciation: There satirical characters can only be pronounced by the teeth like .. U, w .. etc..

Posted 18 hours ago by kenouda kenouda