Today, I came across another second orthodontic patient, a young woman who was regretting that her previous non-extraction orthodontic treatment had ruined the shape of her face. It turned out that she still had a chin, and her family’s chins were all okay-looking, not receding like her current chin, which is a lower chin or no chin whether viewed from the front or side. It turns out that when she was in junior high school, she found a famous local dentist to correct her teeth, because her family and the patient herself were afraid of tooth extraction, the doctor followed the patient’s request, put on braces to line up the teeth, pulling and pulling, after more than a year of orthodontic treatment, it seems that the incisors are not lined up, but the chin is more and more receding – the smaller it is, the side view of the face is more protruding. Two years ago, the clinic also met with a 15-year-old girl who came from out of town, complaining that the jaw was also getting receding in the orthodontic process, brought information, did a comparison analysis found: the original neutral molar relationship, because of crowding, designed to extract four bicuspids, due to parental requirements as little as possible, eventually extracted the two maxillary 4, mandibular unextracted teeth, and finally due to the anterior teeth bite interference, the final remaining gap on the 3 class In the end, due to the occlusal interference of the anterior teeth, the remaining gap was closed by Class 3 traction, which consumed the maxillary support resistance, causing the upper molars to elongate causing the mandibular plane to posteriorly rotate and the mandible to naturally retract. Of course, patients are now paying more and more attention to facial beauty, not just alignment of teeth, so do not think that the doctor’s level is high because the doctor in the diagnosis and design to yield to the patient, take no extraction or less extraction, and choose this type of doctor, can not achieve the effect of orthodontic treatment or destroy the facial beauty, it will not be worth the loss.