Before you get all excited about what the dental plan will pay - I would confirm it with them. My dental plan covers 50% of crowns, BUT it only covers 50% of the cost they THINK you should have to pay.
For me, my dentist charged about $1200 (and I called around, this is what it cost at ALL the dentists around here) but for some reason the dental insurance was sure it would only cost me $400. So, yes, they covered 50% of the imaginary $400. I paid the other $1000 out of pocket.