Teething period is generally around six years old, according to the individual physique of different replacement time may be pushed back, mostly normal phenomenon can be temporarily observed or consider taking a film to check, such as continued for half a year is still not erupted and recommended treatment in accordance with the doctor’s advice. 1. Normal situation. According to the statistical survey, it is generally believed that the teeth will start to change around the age of six, but due to the influence of genetic factors and the development of the individual body, the time of eruption will be advanced or pushed back. If you have not changed your teeth at the age of six, you can take a picture and observe for about six months. On the X-ray, you can see the permanent tooth embryo in the jawbone, and the first permanent molar will erupt first, so you don’t have to worry about it too much. 2. Abnormal situation. If there is still no eruption after half a year of observation, and the lack of permanent tooth germs in the jawbone is found on X-ray as an abnormal phenomenon, we need to consider denture restoration or orthodontic treatment after the development of jawbone is completed. If you are six years old and still haven’t changed your teeth, you can observe for the time being and don’t worry too much, or you can suggest to go to the hospital to take pictures to confirm your teeth’s growth condition.