The end teeth are not necessary to be extracted, but in the majority of cases the end teeth refer to the wisdom teeth. They usually erupt around the age of 18-25, at the very back of the tooth row, so they are also called wisdom teeth, and of course they are the teeth at the end. If the wisdom tooth erupts in good condition, has good alignment, and performs its occlusal function, then it is a completely normal tooth and does not need to be extracted at all. However, clinically, it is true that the majority of wisdom teeth do not erupt in a good orthodontic position, and there are various abnormal eruptions such as tilted eruption and horizontal eruption of wisdom teeth. These abnormal eruptions can cause gaps around the wisdom teeth, resulting in pericoronitis, which can be a major problem for a large number of patients. This type of mal-erupted wisdom tooth must be extracted.