How could it be measured?
By the quality of a nation's teeth maybe? Oh wait a minute ; )
My dentist told me that in the summertime most of her patients are foreigners from Germany and Sweden. Health tourism is a fast-growing sector in PL.
Of course, relatively speaking, dentists are expensive in Germany & Sweden.
Certain products & services are cheaper in Northern Ireland than they are south of the border - and vice versa. People cross the border in both directions to avail of these - not because they are any better (or worse for that matter) but because they are cheaper.
Look, I'm not being awkward teflcat and I have no expereince of Polish dentists myself but so far, we have:
Supposedly worst teeth in Europe
Three posters (inc a Pole) saying how bad polish dentists are
Doesn't look great.