Yes. Since only a tiny bit of local anesthetic is used, only an insignificant amount could get into your milk, so it is safe to breastfeed following a local anesthetic for dental work. Also, dental x-rays pose no problem to the breastfeeding mother or baby.
Breastfeeding is also usually considered safe following a light anesthesia , which is the type used in dental offices when patients don’t want to be awake and aware during dental work. Since the inhalant (usually nitrous oxide ) is cleared so rapidly from your bloodstream, it is unlikely to enter your milk in significant quantities. Unless your doctor advises to the contrary, it is safe to breastfeed as soon as you are able. If there is some specific concern about the anesthetic passing into your milk, breastfeed your baby before the anesthetic is administered, followed by a 3-4 hour wait for the next feeding. Your doctor will be able to advise you on how rapidly the particular medicine would clear your system.