Slow growth of teeth in children may be affected by genetic influences, dietary factors, calcium and vitamin D deficiency. 1. Genetic factors: children’s slow growth of teeth may be due to genetic factors, for example, both parents have slow growth of teeth, then children may also have slow growth of teeth. 2. Dietary factors: If children usually eat too fine and soft food, they will not be able to stimulate the eruption of teeth because they usually have less chance to chew. 3. Calcium and vitamin D deficiencies: slow teething in children can also be related to calcium and vitamin D deficiencies, which can slow the growth of teeth. Children’s teeth grow slowly, there may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.