Re: crown on wisdom tooth?
If you already have your 2 premolars and 6 & 12 year molars there, why do you need the wisdom (18 yr molar) tooth? If the filling isn't bothering you, why crown it? Eventually the large filling may give way and the tooth would need a crown, but if you don't really need that tooth, why spend the bucks??
Most good dentists these days are all for taking out the 3rd molars because they cause the necessary molars in front of them alot of problems, like decay or periodontal problems, due to the fact that they are so hard to get way back there to floss.
You should discuss the need for your wisdom tooth with your dentist before crowning it.