That actually doesn't sound that bad. I recently had an exam where the dentist recommended that I replace two of my fillings. I'm not having any pain, nothing is chipped or broken, but there is a bit of erosion on the top of these two teeth, and it looks like the edges of the fillings are turning black. The black, I'm told, is where the fillings are starting to seperate from the tooth and is where plaque and decay can start to build up. They are basically "EOL" and need to be replaced. Cost per tooth = $1350 for gold caps (slightly less for porceline, which they don't recommend because of the erosion - likely to break eventually). The clencher is I may also need orthodontic work (braces) to correct a minor crossbite which is causing the tooth erosion. I don't have dental insurance, but I'm sure thinking about getting some if I need all this work done!