What is a “Ground Bunion”? The normal occlusal relationship of the front teeth is that the upper front teeth cover the front of the lower front teeth. If the opposite phenomenon occurs, that is, the lower front teeth are located in front of the upper front teeth, it is often referred to as “circumference”, which is medically known as anterior anti-mandibular. “The disease is a kind of oral malocclusion, which is a kind of common malocclusion among children in China, and it has serious impact on oral function, facial aesthetics and mental health, and the symptoms gradually aggravate with the growth of the patients. Why does “circumcision” occur? There are many reasons for the development of “circumcision”, which can be summarized as heredity, congenital diseases, and acquired causes. “There is a clear genetic predisposition for the condition, and children often have a family background; certain congenital diseases such as congenital cleft lip and palate can also cause the condition. Acquired causes include systemic diseases such as rickets, respiratory diseases such as chronic tonsillitis, abnormal replacement of milk and permanent teeth, bad oral habits such as tongue sticking out, finger sucking, biting the upper lip, mandibular protrusion, and incorrect artificial feeding (such as breastfeeding in the supine position, bottle feeding, forcing infants to suck with force in front of the baby) and so on. What are the dangers of “teresimus”? “The abnormalities of oral function, including reduced chewing efficiency, bite trauma, etc., can be caused by the condition. Moreover, in severe cases, it often leads to facial depression and chin protrusion, which is characterized as “crescent face”, which has a great impact on the aesthetics of patients, and subsequently leads to psychological problems, affecting the normal work and study life of patients. How to treat the “circumcision”? What is the best time for treatment of “Envelope”? If you find out the condition of “Envelope”, you should go to the hospital in time to get a clear diagnosis of the cause of the condition. There are different treatments for different causes of “Enveloped Skin”. In children, “circumcision” is often caused by bad habits, and usually the jaws can return to their original position after the bad habits are corrected. If it is not eliminated, treatment is needed. Generally speaking, premolar antimaxilla can be treated around the age of 4. If the child can cooperate, treatment should be carried out as early as possible to prevent the antimaxilla from continuing to develop and aggravate. Teething and early permanent teeth (8-10 years old) is the appropriate treatment period for “circumcised teeth”, this age of the child’s cooperation is relatively high, for the patients who have already caused maxillary dysplasia, facial depression should be treated promptly and as soon as possible. At this time, wearing a special orthopedic appliance, the development of the restricted upper jaw to the front traction, to promote the growth and development of the upper jaw, can achieve twice the result with half the effort. For adult patients who have already completed their development, those with less serious skeletal causes can be masked by fixed orthopedic treatment; if the skeletal factors are more serious, surgical methods are needed to correct the wrong skeletal relationship.