Wow, that is dedication. I'm not sure I have ever ran into a pleasure read about dentistry and dental topics aren't covered on the DAT. Don't overthink this stuff, anything you need to learn for the DAT will be in the study material and everything you need to learn about dentistry to function as a dentist, you will be tossed into in dental school... kinda like when the mama bird pecks her babies out of the nest. Sink or swim at that point, buddy 😉