You can’t get infected with AIDS as long as you visit a dentist in a regular hospital, where instruments are sterilized and not mixed. And AIDS infection can only be contracted if both patients in contact with each other are bleeding and both have wounds present and have contact within a short period of time. If some non-compliant medical institutions don’t sterilize properly, or don’t change the instruments, and there is blood on the instruments, and it just so happens that both parties have wounds, there is a possibility of HIV infection in this situation.