Missing teeth in the mouth called the wrong medicine in a lopsided, we generally think that is genetic, disease, endocrine obstacles, malnutrition, tooth for the obstacles and oral bad habits and other factors affecting the results. Now there are “30 percent to 50 percent of the people in, and the growth trend. Missing front teeth made a number of reasons, but not the main reason for that is genetic, why ancient people who have very little, so one of Should be the key factor degradation, and degradation due to disuse. With the continuous development of human life, from eating raw food to eat cooked food, from eating cooked food to eat rotten food, the growing role of small teeth, jaw so Not very good stimulation, lack of skull, teeth and the degradation of relatively slow, so that a small jaw and Daya contradictions, Rong Buxia jaw has so many teeth. Now is a lot of wrong crowded dentition. The mandible of a long process, but also the alteration of life, its people and bite into a functional state and the tooth eruption is closely related to the situation. So to reduce a mistake, a good teeth, or maintain the orthodontic Results, the key is to strengthen the use of, such as hard to eat the food, fiber and more food or higher gear. In this regard, we found that patients nights molar teeth is very neat. Women because of poor occlusal function, often in the adult will There are wrong.