ok, like everyone has said, there isnt any dental school that is "easier" to get into. However, if you do your reserch into statistics, and know what each one is looking for (see websites, open days etc)..it is possible to work out which ones YOU personally are more likely to get into. e.g some dental schools interview a lot of people, and then narrow it down from interview. Whereas other schools narrow people down just from their applications, and only give a few interviews out. Therefore, if you feel you're strengths are in your interview skills, apply to the 1st kind of uni. Whereas, if your strengths will be in your personal statement nd grades (written application parts), apply to second.
Now this is only one of the factors you have to look at. So dont just go by what I have said. But, just do some research. Some people may disagree with what I have said, but it worked for me.
If you are stuggling to find staistics, in the "getting into dental school" book, at the back there is a (slightly out of date) table of admission statistics. Have a look at that. Hope that helps/ makes sense!