So I have a pretty bad cavity in my upper right wisdom tooth. The dentist has been urging me to pull it but I know that if I pull that one I'll have to pull the lower right one eventually and honestly, the longer I don't have to deal with it, the better. The thing is the upper right wisdom tooth is crumbling. Pieces of it are breaking off little by little. I *think* it may fall out on it's own. Any danger in just leaving it to do so?