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.
Symptoms & Signs. The jaw joint, medically referred to as the temporomandibular joint or TMJ, is made up of the bone below the mouth (the mandible, commonly referred to as the jawbone) and the bone just above the mouth (the maxilla). The TMJ allows the upper jaw to close on the lower jaw and is one of the most frequently used joints of the body. The temporomandibular joints are complex structures containing muscles, tendons, and bones. Injury to or disorders of these structures can all result in pain in the jaw area.