Two ways of teaching dentistry

Hi,

When I was touring a dental school (temple) long time ago, someone mentioned in the tour there were two ways of teaching students at dental school. i'm not sure i remember the exact terms, but i think they were "block method" and "comprehensive method". a school adopts one or the other. does this topic ring a bell to anyone and do you know which method is more popular, if it's even possible to evaluate it in such manner?
appreciate it