The treatment principle of congenitally missing teeth is to restore the chewing function and maintain a good occlusal relationship. 1.When the number of missing teeth is small, the impact on chewing function, dental morphology and aesthetics is not significant, and generally no special treatment is needed. 2.When the number of missing teeth is large, it not only affects the chewing function, but also affects the patient’s appearance and causes damage to the patient’s physiology and psychology. Timely active denture prosthesis to restore the chewing function and promote the development of jaw and facial bones and muscles; but it should be noted that the denture prosthesis must be constantly replaced with the growth and development of children’s teeth and jaws; generally replace the denture once a year, so as not to prevent the child’s jaws need to do active denture prosthesis to help restore the chewing function and promote the growth and development of the jaws and face. 3, congenitally missing teeth in childhood did not receive appropriate treatment, as the age of the remaining milk teeth gradually loose and fall off, it is generally recommended to wear a denture as early as possible in childhood to restore the function of missing teeth, so that the jaw bone in the edentulous area is stimulated by chewing and promote the development of the jaw bone, while avoiding compensatory hyperfunction of soft tissues, creating conditions for later restoration. The congenitally edentulous patients are usually poorly developed vertically and horizontally, which makes the restoration work very difficult. If the mandibular implant denture can be restored during childhood, the denture suitable for growth and development can be replaced in time for regular review, so that the upper and lower jaws can be stimulated functionally, which should have a positive effect on the improvement of the patient’s facial shape, upper and lower jaw development and restoration in adulthood. However, implantation during childhood may occur relative to the sinking of the implant restoration, so implant restoration should also be relatively cautious and prudent. When the maxillary lateral incisors are congenitally missing, after analysis of the sympathetic relationship, a gap retainer or an occlusal induction method can be used to move the permanent cuspid proximally to the lateral incisor position, and then the cuspid crown can be adjusted and reshaped to replace the lateral incisor. 5.When the permanent teeth are congenitally missing, the preservation or extraction of the baby teeth must be carefully considered. When the permanent teeth are crowded, the milk teeth of the missing permanent teeth can be considered for extraction to provide clearance for the crowded permanent teeth; when the permanent teeth are sparsely arranged with large clearance, the retained milk teeth can be preserved to maintain the complete dental alignment and chewing function; the length of retention of the milk teeth will vary greatly among individuals, and once the retained milk teeth are lost, timely restorative treatment should be performed. 6, the congenital absence of the wisdom teeth of the upper and lower jaws, that is, the “third molar”, can not be restored, this tooth is a degenerate tooth in the human dental development, the congenital absence of the third molar is not pathological and does not require treatment. 7, for patients with congenital multiple tooth loss, the common restorative methods are fixed denture, movable denture and implant-supported denture; if necessary, it must be combined with orthodontic treatment, orthognathic surgery treatment to achieve better results, while the jaw bone of patients with mandibular permanent tooth loss is underdeveloped, the alveolar bone in the missing tooth area is severely stunted, is knife-edge shaped, the height is almost flush with the vestibular sulcus, retention is difficult, and the traditional removable It is difficult to achieve the ideal effect with traditional removable denture.