In clinical work, we meet many friends who want orthodontic treatment, both parents and myself, most of them think that orthodontic treatment is for aesthetics; in fact, it is far from that. The vast majority of friends who need orthodontic treatment have different degrees of tooth misalignment, and the biggest disadvantage of unaligned teeth is that they cannot be cleaned when they brush their teeth. The lack of cleanliness will lead to the deposition of calculus, plaque adhesion, which in the long run will cause the resorption of alveolar bone, gum recession, and ultimately directly affect the life of the teeth. This is why adults find receding gums after orthodontic treatment, not because of the orthodontic treatment, but because the alveolar bone was originally resorbed and could not be seen when the teeth were not aligned, but when the teeth were aligned, receding gums were found. So orthodontics is not just about aesthetics, but serves the greater purpose of making teeth easier to clean and healthier. One of the evaluations of health standards in the United States is that 80 years old is a guaranteed 20 natural functional teeth in the mouth. Americans dare to propose this standard because their awareness of oral health care is very high, and they attach great importance to the neatness of the teeth and the cleanliness of the teeth.