Same thing happened to me. I called the dental folks at West Point. So long as they are filled before he reports, he should be fine.
I included updated radiographs that show the fillings in my dental packet just in case. I also had my dentist write and date a note saying that all needed dental work was completed and there was no further treatment needed.
This is just my experience however. I recommend calling the DENTAC number listed in the dental cover sheet for absolute clarification.