When children reach the age of 10-12 years old, which is the medical term for the period of tooth replacement, they will have misaligned and crowded teeth due to genetic factors and bad biting habits. Parents should take their children to the doctor for treatment in time, otherwise it will affect the child’s facial shape, aesthetics, future chewing function and dental health. If the teeth are not aligned, it is relatively easy for the food and soft scale to remain on the tooth surface, poor oral hygiene, teeth susceptible to caries and periodontal disease, and premature tooth loss. When adult, jaw bone development is completed, and then want to do treatment, the cost is higher and the effect of treatment will be greatly reduced. Therefore, we must pay attention to oral health care from childhood, and it is better to go to a professional dentist from three months to six months for examination and treatment plan to prevent the problem before it happens. I wish you all a healthy and beautiful teeth.