I went in to see the dentist a week ago because I was having minor sensitivity in one of my front teeth. He examined the tooth and couldn't find any visible signs of decay, but an x-ray revealed that it was abscessed and would need a root canal. How long does it take to do a root canal on a front tooth and what should I expect? He also said I will need a crown, but I've been doing some research and found that front teeth don't always have to be crowned? Is that true and if it does have to be crowned, will it look natural and match my other teeth?