That's where I'm headed, bright and early this morning. Week before last, they found something they didn't like, something small. My early working years were, among other things, a time when dentistry was an unaffordable luxury,* so I have learned the hard way the importance of resolving such issues when they are still small.
Update: Survived the experience once again. --Also, I am more impressed with modern dental technology every time I encounter it. In just the last 20 years, they've gone from glopping in mushy metal to UV-cured miracle plastics that perfectly match one's teeth, pre-coatings that improve adhesion, desensitize and kill bacteria, and caries-detecting chemicals. Holy cow -- I remember when the best they had was purple dye to check how well you brushed your teeth!
* No, really -- when I was 23, my parents gave me an unusual birthday gift: removal of my wisdom teeth (the uppers had come in in splinters!) and a whole lot of fillings. One of the best presents I've ever received; it had been five years between times.
3 months ago