A child born with two missing lower teeth may be due to premature loss of milk teeth, apical lesions of milk teeth, tough gums, etc. It can be treated by orthodontics with retraction surgery, orthodontics with dental implants or prosthetic restoration. 1. Orthodontics with retraction surgery: The child is congenitally missing two lower teeth, but there are relatively structurally intact teeth hidden in the alveolar bone due to premature loss of milk teeth, apical lesions of milk teeth, tough gums and other factors that prevent the teeth from erupting smoothly. For this situation, patients can prioritize orthodontic treatment to leave enough space for the teeth, and then undergo tooth pulling surgery to pull the teeth to the correct position. 2. Orthodontics plus dental implants or prosthetic restoration: Most patients need to prioritize orthodontic treatment, and then according to the patient’s oral condition, close the gap, focus the gap and keep the gap. The main purpose is to prepare for the subsequent dental implant treatment and prosthetic restoration treatment. Since congenital missing teeth mostly occur in children, and dental implant treatment and prosthetic restoration treatment are more suitable for adults with fully developed alveolar bone, children temporarily use invisible dentures to maintain their oral and mental health. In such cases, patients need to go to a regular hospital to receive treatment and follow the doctor’s instructions.