The cost of a filling needs to be determined by the extent of the damage to the tooth before deciding on the cost of the filling. If the tooth is not badly damaged and is relatively shallow, it can be filled in one go and the cost will be about $200. If the damage to the tooth is deeper, causing damage to the pulp and nerve, the treatment is more complicated and may require apical treatment or braces to prevent further decay. It will take about 2-3 visits to complete the overall treatment, and the cost is relatively higher, around 500-1000 RMB. However, the specific cost should be based on the hospital’s fees and the price of the area where the treatment is performed. Children should have regular oral health checkups so that when problems are found, they can be dealt with in a timely manner. Proper treatment treatment should be given under the guidance of the dentist. Effective prevention of malocclusion is important so that children are not treated in a timely manner when they develop conditions such as geodontia and miss the best time for treatment, resulting in physical and psychological harm later in life. Children should eat less sugar-containing foods such as sugar cubes, pastries, chocolates, ice cream, ice cream, etc. to prevent the occurrence of dental caries. Brush teeth before and after meals, remove meal stains on teeth in time, use correct brushing methods and develop good oral hygiene habits.