I remember reading this article (or a very similar one) as well. It sent me down a path of looking for evidence based dentists, which are quite hard to find. I couldn't end up finding one that seemed to fit that bill in my local area. I talked to a recent dental school graduate friend who described some evidence that school debt is highly correlated to over-treating.

I ended up going the direction of looking for dentists unlikely to have debt and found a former army dentist and have been thrilled with how much less "well, let's do it all just in case" she is than my previous dentist (who had a TVs on the ceiling of every room and a new piece of major equipment every time I went).