I was looking at discussions from this time last year to see when people heard back.
Sheffield won't get back to anyone until end of January- they said that in their email when they stated they're processing our applications - "We look at all the applications before making decisions and this process does take time. You can expect to hear from us by the end of January." <----- that's what it said in Sheffield's email.
According to the discussions from last year, Cardiff were sending invitations to people for interviews towards the end of November (around 23rd/24th).
Liverpool were sending invitations to people beginning to mid January (around 14th).
With regards to other Universities, I would type "-university name- Dentistry interview" into the search bar and go back to discussions from this time last year until you find someone who has posted they have received an interview- then you'll know roughly when you'll probably hear back.
Hope this helps!