An incisor that has been extracted for a month and a half and still hasn’t grown will not be replaced if it is an adult incisor extraction. If it is a child in the replacement period, it is considered that the extraction time is too early or there is a lack of permanent tooth embryo. 1. Adults: People will only replace their teeth once in their life, when they are adults, the incisors will not be replaced and need to be restored by denture after extraction. 2. Children during the replacement period: the replacement of incisors usually occurs around the age of seven to eight years old. If the time of extraction is too early, the time of incisor eruption may be lengthened due to untimely eruption, or due to the early extraction of teeth, the gums are thickened and the teeth are difficult to erupt. 3. When the permanent embryo is congenitally missing, there will be no tooth eruption even after the extraction of milk teeth, which needs to be examined by taking x-rays. It is recommended to go to the hospital to check the eruption of teeth after one month of extraction.