There are many reasons for anterior tilting of incisors, such as bad habits, hereditary factors, retained milk teeth, and so on. 1. Bad habits: usually have the habit of open-mouth breathing, biting the lower lip, or like to bite foreign objects, etc., may lead to anterior tilting of the incisors. 2. Genetic factors: the presence of anterior tilted incisors in parents or family may also lead to a higher incidence of anterior tilted incisors in the patient himself/herself. 3. Retained milk teeth: milk teeth do not fall out on time, which may lead to abnormalities in the eruption of permanent teeth, resulting in misaligned growth, and thus anterior tilting of the incisors. There are many reasons for the anterior tilting of incisors, and it is recommended that patients go to the hospital in time to improve the examination and take standardized treatment according to the doctor’s instructions, so as not to ignore the symptoms and take them lightly.