Having only three lower incisors may be abnormal; a normal jaw has four incisors.
If there are only three lower incisors, it may be due to the absence of tooth germs during development or the fact that most of their lateral incisors and incisors are located in the deeper part of their jaws and therefore cannot grow out completely.
It may also be due to the fact that appropriate nutritional supplements were not given in time during the tooth replacement process. Lack of nutrition or poor oral habits can lead to a jaw with only three incisors.
If there are only three incisors in the lower jaw, it is recommended to go to the hospital stomatology department as soon as possible, under the guidance of professional doctors for examination and evaluation. You need to pay attention to dental hygiene in your daily life to avoid causing serious conditions.