Tooth replacement at the age of 5 years and 8 months is a normal physiological phenomenon and generally does not require special clinical treatment. For children in normal physiological state, the first permanent teeth (located after the first permanent molar and the second molar, i.e., the six-age teeth) will erupt at about 6 years of age after birth. The eruption of six-age teeth at the age of five years and eight months is also a normal physiological phenomenon and does not require special clinical treatment. In addition, the healthy growth of teeth is related to thyroid hormones, protein, calcium, phosphorus and many vitamins, so it is recommended to ensure that children’s nutritional intake is comprehensive and balanced. If children experience any discomfort during their growth and development, it is recommended that they receive standardized treatment and a scientific and reasonable diet under the guidance of a doctor and a nutritionist, which is conducive to their good growth and development.