The terminal tooth refers to the third molar, or wisdom tooth. In most people, wisdom teeth are blocked by the jawbone or the front teeth because there is not enough space for eruption, so that only part of the crown can erupt into the mouth and part of the crown cannot erupt in the bone tissue. It is recommended that wisdom teeth be extracted as soon as possible because there are blind pockets of gum soft tissue on the surface of wisdom teeth, which can cause inflammation of the soft tissue around the wisdom teeth when the body’s resistance is low, such as when you are tired, stay up late, catch a cold or have a fever, resulting in local swelling, pain and restricted mouth opening. Only a very small percentage of people have wisdom teeth that grow upright and have a good occlusal relationship with the wisdom teeth of the opposite jaw, and can perform chewing functions like normal molars. Some people are born with missing wisdom teeth or they are completely buried in the bone tissue and do not grow out. The end teeth are the second molars, which are the teeth that normally perform chewing functions.