Shape of apex of the root

Hello, It’s my first year in dental school, and in my dental anatomy book we study the structural and morphological features of all teeth. My book gives much significance on mentioning the shape of apex of each tooth, e.g. the apex of the upper central is blunt. That’s of the upper first premolar is pointed, etc. The thing I want to know is the shape of the apex really an important thing? I.e. should we know the shape of the apex of each tooth? Decidous and permanent? Also, I don’t... Shape of apex of the root
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