I broke a similar tooth a few weeks ago, and I HATE the dentist. I hadn't been in 14 years, I take very good care of my teeth because of the fear. I went in and they fused some new white filler onto the mostly silver tooth. Luckily, the tooth was still sealed, so it was an easy process. If yours isn't hurting yet, it is probably still sealed, too, so get in there before the filling breaks away with all of the horrible complications (having to clean it out, pain, abcess, antibiotics, the whole nine yards). Good luck!