Wisdom teeth without extraction are not necessarily harmful and should be judged according to the direction of growth and location of wisdom teeth. If the wisdom tooth grows partially in a vertical direction and there is no swelling or pain, it can be retained first and observed regularly. However, if the result of the examination of the full-mouth surface tomography shows that the wisdom teeth are growing in the wrong direction, they may affect the growth of the neighboring teeth, the wisdom teeth in the opposite jaw, and may be harmful if they are not extracted. If the wisdom teeth grow crookedly, they may affect the growth of the neighboring teeth, which may lead to loosening of the teeth and, in severe cases, their loss. It may also rub the surrounding oral mucosa and cause swelling of the surrounding tissue and traumatic oral ulcers. Repeated inflammation around the crown of the wisdom tooth can lead to problems such as difficulty in opening the mouth, pain, and in severe cases, fever. In addition, if the wisdom tooth cannot be fully erupted, it may be easy to accumulate food residue and lead to bacterial accumulation, thus causing pericoronitis and decay of neighboring teeth, so it is also recommended to remove such cases as far as possible. However, not all wisdom teeth meet the conditions for extraction. If wisdom teeth are close to the inferior alveolar nerve, forcible extraction may cause nerve damage and affect the sense of taste, which is dangerous to some extent. Patients suffering from heart disease, high blood pressure and diabetes are prone to systemic complications and need to choose carefully according to the doctor’s advice.