Hi Laurel - I had those same concerns about my sons teeth when he was young. We did the same thing (squirting liquad cortef into mouth while sleeping/napping). Our pediatric dentist said not worry. He looked at the info and researched the med and said that there was not a reason for concern. Anxious to hear what your dentist has to say. Please let me know. Also, just for your info, my son has never had a cavity.