Can I somehow divide prefab more

So I have a prefab model chosen named "Teeth lower". But for convinience reason of scripting I need to divide the teeth, separating each tooth by itself, so every tooth would show up in hiearachy. Can I somehow do it within Unity itself?

 

So is this a model? What is the base object of that object?
I am guessing it is a full model, which might not be a task for Unity.