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The permanent dentition has a total of 32 teeth, including wisdom teeth.
Here is the composition of this dentition:
These teeth will be visible in the mouth from the age of 12 or 13. The first adult teeth will appear from age 6-7 and form the mixed dentition because there is still the presence of some primary teeth. The last primary tooth is shed around age 12.
Enamel is the most solid and hardest tissue of the body. On the Mohs hardness scale, tooth enamel reaches 5, while glass and steel reach 5.5 and diamond, 10.
Since enamel is even resistant to the destructive effects of fire, it is not uncommon to use teeth as a source of DNA for forensic identification of human remains. Enamel is, however, very sensitive to acids and must be protected from them through the removal of dental plaque by tooth brushing.
Throughout history, detailed examination of teeth has disclosed valuable information regarding their host. Thus, teeth can provide information about species, age, and social status of humans and animals. For example, DNA from teeth helped to identify causes of death like the plague, typhus, and various poisonings.
The permanent dentition has several crucial functions:
Tooth loss causes a loss of alveolar bone (jawbone), which makes your face look older than it is in reality.