If the root of the tooth is not resorbed, the tooth can be restored with a crown after root canal treatment; if the root is resorbed, the tooth needs to be extracted, and then restored with dental implants or other prostheses at a later stage. 1. No root resorption: when the root is not resorbed, root canal treatment can be performed on the tooth first, and after two weeks, if the tooth does not show any pain, crown restoration will be performed to restore the function of the tooth. 2. Root resorption: when the root of the tooth has been resorbed, in this case the tooth retains little significance, it is best to extract the tooth, after extraction of 2-3 days to squeeze out the milk not to feed the child to prevent the anesthetic affects the secretion of milk, and then later on according to the situation of the missing teeth to choose dental implant restoration or other prosthetic restoration. Breastfeeding big teeth broken empty in a timely manner to the regular hospital, under the advice of a professional physician to choose the best treatment program.