When I got on the list, I was told that my hospital's requirements were antibiotics for even a simple cleaning and checkup. One year after my transplant, the hospital sent out a letter with the new policy - no antibiotics needed for simple care like cleanings, cavities, and caps, according to recent studies. So, the real answer to the antibiotic question is - do whatever your hospital tells you so you can stay on the list. I haven't had any problems with care either before or after - except for hating to get near a dentist!