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.
The first set of teeth which come in. Primary teeth are also called baby teeth or deciduous teeth. Secondary Teeth: Your permenant teeth, i.e. the second group of teeth to come in. Quadrants: The four parts of your mouth, that is the upper left, the upper right, the lower left, and the lower right. Numerical notation for teeth