The Committee on the Status of Endangered Species, a federal advisory group, has created a list of 340 animals and plants that are in some jeopardy. Here are the categories the committee uses: Extinct  The species no longer exists in Canada.
The front teeth are called incisors, You have four incisors on the top jaw and bottom jaw. the central incisors (the front two teeth) the lateral incisors (the teeth on either side of the central incisors) they have multiple functions. your smile, having a full set of teeth will give you an even smilwe.
Permanent teeth are the set of teeth that we get after the age of 6 years and serve us for the rest of our lives. We have 32 permanent teeth, 16 at each jaw, which are also known as secondary or adult teeth. They form the permanent dentition which is fully completed much later at the age of 17-21 years with the eruption of the third molars (wisdom teeth).