After the patient comes to the hospital, through physical examination and CBCT, which is often taken in dental hospitals or dental clinics now also have CBCT, as long as the CT three-dimensional imaging will be very clear. In fact, the jaw angle is not a disease, only to the people around or to the candidate itself, in this can not be called patients because it is a healthy population, so the candidate itself is to their own requirements, and is not a disease, cut or not cut on health has no impact.