Abnormal central apex is an abnormal tooth morphological development caused by abnormal morphological differentiation of enamel organs during tooth development. The principle of treatment is to protect the pulp and teeth, and observe the roundness without obstruction. If the tip is easy to break, it should be reinforced and polished many times. If it causes periapical lesions of pulp, root canal treatment should be carried out in time.
Tooth invagination refers to the abnormal tooth morphological development caused by excessive folding or local excessive appreciation of enamel organs during tooth development, including lingual fossa abnormality, lingual cusp abnormality, root canal abnormality and middle tooth abnormality. The treatment method is to fill the unexposed dental pulp according to the principle of deep caries, and treat the exposed dental pulp with root canal therapy. Tooth occlusion is not exactly correctable. Correction can be divided into several steps. The first step is to take photos before operation, take molds, make correction plans, sign informed consent forms, and deal with dental lesions in the oral cavity at an early stage. Then officially enter the orthodontic treatment, install brackets, and start to make corrections. First, level and align, and then close the gap. In addition, fine adjustment and maintenance after orthodontics allow patients to wear the retainer for about one to two years, reducing the possibility of recurrence. This is the whole process of orthodontics.