Root canal treatment of milk teeth leads to the six-age teeth not growing well, may be related to the loss of chewing function of milk teeth, milk teeth after root canal treatment early loss and other factors, according to the different causes of eruption, production of gap retainer, orthodontics, and other therapeutic measures to make the six-age teeth grow well. 1. Loss of masticatory function of milk teeth: six-year-old teeth usually grow in the distal end of milk molar at the age of six. If the milk molar due to caries root canal treatment, the child is often used to not use the affected side of the chewing, the side of the loss of chewing function or decline, resulting in the milk molar distal six-age teeth eruption is limited, the growth is not good. At this time, the child can be instructed to chew normally on the affected side to stimulate the normal eruption of the six-age teeth. 2. Early loss of milk teeth after root canal treatment: After root canal treatment, milk teeth are fragile, and if you eat hard food, it will cause the crown of milk teeth to be defective and milk teeth to be lost prematurely, and the six-age teeth will be shifted to the gap of the missing teeth and will not be able to grow well when they are erupted. At this time, the gap keeper can be made to prevent the six-year-old teeth from tilting to the proximal center; if the tilting has occurred, orthodontic methods can be used to adjust the position of the six-year-old teeth. If the six-year-old teeth do not grow well, you should consult the doctor in time, complete the examination, clarify the cause and diagnosis, and standardize the treatment under the guidance of professional doctors to avoid adverse consequences.