Your dentist will recommend you to remove your wisdom teeth for the following reasons: 1. Cavities. Wisdom tooth decay in addition to very simple occlusal surface of the cavity can be filled, those neighboring surface of the cavity requires very good technology, as well as the cavity is very deep, or even need root canal treatment, we always recommend extraction, to eliminate future problems. 2, infringement of neighboring teeth. 3, insufficient space. Wisdom teeth have disappeared in the history of human evolution, so the dental arch is getting smaller and smaller, and the lack of space is very common.4, not easy to clean. Due to the lack of space, wisdom teeth often grow crooked and twisted, which makes it difficult to clean the teeth, resulting in tooth decay.5, there is no opposing teeth.6, blocked teeth. This kind of obstruction is more common and complicated, there are near middle obstruction, buccal obstruction, lingual obstruction. Above said need to be removed wisdom teeth, we say again can be retained wisdom teeth. What kind of wisdom teeth are worth preserving?1, the position is relatively positive, is expected to be able to erupt normally.2, the soft tissues around the crown of the wisdom teeth are not inflamed or painful, the wisdom teeth are not decayed.3, there is a normal occlusal relationship of the wisdom teeth.