There are many reasons for uneven teeth, apart from heredity, there are more acquired influences. For example, during the process of tooth replacement, some baby teeth are lost in time or permanent teeth do not erupt on time, which can lead to crowding of permanent teeth after eruption. In addition, some children eat food that is too soft, and the alveolar bone is underdeveloped due to the lack of chewing force stimulation, resulting in uneven teeth after eruption. In addition, some bad oral habits such as hand eating, lip biting, mouth breathing, etc. may also lead to misaligned eruption and unaligned teeth. An unaligned mouth can be harmful to the local health of the oral and jaw system and even to the health of the whole body. First of all, it affects the function. Misaligned teeth cannot form a correct biting relationship, resulting in inefficient chewing during meals and swallowing food without sufficient chewing, which will not only affect the absorption of nutrients but also increase the burden on the gastrointestinal tract. Secondly, uneven teeth will form many “hygiene corners” in the mouth, and food residues will be left for a long time and breed bacteria, leading to an increased risk of caries and periodontal disease. In addition, the impact of uneven teeth on the appearance and mental health should not be ignored, and more serious uneven teeth will affect the growth and development of the whole face, forming a “ground-bound”, “sky-bound” or “convex mouth “and other facial deformities, further aggravating children’s low self-esteem. Therefore, it is recommended that patients with uneven teeth should consult an orthodontic specialist as soon as possible and carry out the appropriate treatment for the cause, and children should develop the habit of going to the hospital for regular oral checkups every year, so that problems can be detected early and intervene in a timely manner.