How can I increase my chances of getting into dental school?

Hey, what GCSEs did you get? The big problem with GCSEs is that these days for most dental schools (but not all, you'd have to research yourself as each dental school is different) is that the chances are, unless you have A grades in Science, Maths and English then Unversities will not consider you when you apply as an undergraduate. If you've covered those bases, then you will need to research into Unis that put a high emphasis on things like the UKCAT, work experience and extra curricular instead of GCSEs, as some Unis use GCSEs as a point system to give out interviews.

Finally, on the articles, I highly suggest looking into articles posted by the British Dental Journal, and specifically, BDJ student. If you know someone who's a member of the British Dental Association (most dentists and dental students are), asking to borrow one of their magazines won't do any harm. Good luck!

I got As in physics, chemistry, biology and maths and got a B in English language :/

Okay, no need to panic, it's not the end of the world because I had a B in English language too, and that's the only reason I mentioned it, but I got in! I know for definite Leeds and Plymouth accept Bs in English and if you look at other Unis, hopefully they'll be the same too. At the end of the day, you only need one offer! If you follow the advice from the previous poster behind me (especially work experience, Leeds especially like long-term work experience in a caring environment) you should be okay! Best of luck!