Fate 1: It never existed! Congenital absence: Sometimes one or two are congenitally missing due to genetics and other reasons, and the most likely to be missing are the third molars, or wisdom teeth. Any one of the four wisdom teeth can be missing, so the average person has 28 to 32 teeth in the mouth. The second tooth that tends to be “absent” is the lateral incisor, the one between the incisors and the cuspids. Destiny two: its existence is a redundancy! 1, extra teeth: the most common is the upper two incisors between an extra tooth or two small teeth. The extra tooth is not only in an awkward position and abnormal shape, but also has no relative teeth and no function, and should be extracted as soon as possible. 2.Orthodontic extraction: teeth are too crowded and messy, they need to be adjusted and rearranged. Where does the space come from? Only some less important teeth can be “harmonized” away, which is the orthodontic extraction before. 3, wisdom teeth: a few “evolution” of the more complete people born without this tooth, other still “primitive” people can be miserable, to the age of 18 or 19 years old, this long-term “buried This is when your ordeal begins, as the tooth that has long been “buried” in the jawbone begins to burrow out in various rugged positions. Extraction is usually recommended. Fate #3: A flying catastrophe! Dislocated tooth: A broken finger can be replanted, but can a completely dislocated tooth be “fitted” back in? The answer is yes. Fractured tooth: The broken part may be on the outside (crown fracture) or on the inside (root fracture); maybe just a corner is missing; maybe almost a large part is missing, so seek medical attention as soon as possible. Predestination 4: Do teeth fall out with age? People used to think that teeth will loosen and fall off naturally as people get old, but actually this is a misunderstanding. Periodontal disease: In addition to tooth decay, trauma, the most common cause of tooth loss in the country is periodontal disease. Many people’s teeth are good, but only because their periodontal support tissues are damaged, the teeth will gradually loosen until they fall out, or have to be extracted.