Hello, while having a filling done last week, my dentist noticed that a root canaled, and crowned tooth, that was done years ago, had a cracked root. He said that I should have the tooth extracted. He told me that i should make an appt. for this. we are going on vacation in a few days, and I would like to wait until we return to have this done. is this reasonable, or should i have it done asap? no pain right now.