乳歯列前期に矯正治療を開始した反対咬合の1例

抄録

There is a high incidence of anterior crossbite in the Japanese population. It is possible that crossbite involving functional factors, such as premature contact, may change to§keletal crossbite. Therefore, it is important to remove the functional factors early to promote a normal growth pattern. We commenced orthodontic treatment very early for a patient with anterior crossbite associated with premature contact and obtained a good result.The patient was a 3-year-1-month-old girl at the first consultation. In the initial phase, an activator was placed to prevent premature contact and this contributed to improving crossbite. Thereafter, we observed long-term growth status and treated the patient with a multi-bracket appliance. As a result, the patient showed stable occlusion and a good aesthetic profile.This report suggests that early orthodontic treatment of crossbite leads to a normal growth pattern of the jaw bone and stability of occlusion.