My dentist is in the Belle Vale centre (if you don't know where that is then get the 79 (Arriva) or 14 (Halton) from Town and get off when you see a 1970s monstrosity with Belle Vale Shopping centre written on a bright yellow sign in navy blue. It's painful to look at, I know. But the dentist herself is absolutely lovely (through sheer fluke of timings my 6-monthly checkup a few years ago was on my 18th, she greeted me with a huge hug, card and bottle of vodka hehe!). It's completely NHS and I think students get free NHS treatments although I'm not entirely sure. Although if you'll definitely be treated for free at the dental hospital then obviously that's the better bet.