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About my cracked tooth...

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I probably should of already asked this when I asked my other questions about my dental issues, but I forgot lol
On my cracked tooth *which is located in the back*, it's not completely gone at all. The middle is sort of gone... what it looks like is a tooth with a rather large hole. But the crack part looks kind of... brown. Is this my tooth's roots?! Or is this just how cracked teeth do?
Does this sound really really bad and unsavable? Or does it sound like it can be saved? And no, it doesn't hurt at all. Never has actually. Pretty much what I'm asking is do you all think my tooth will need to be pulled or not? And if so... what will happen? Will I look weird? I really don't want it removed =/
Thoughts/help would be much appercaited.