I had a baby tooth (upper jaw) until a few years ago. As I aged it became so small and began to yellow in color, so I had an orthodontist look at it with options. I also had an overbite along with a couple of slight "fangs".
Anyway, we determined that I should have the baby tooth extracted, and because I'm so old, the adult tooth underneath would have to be brought down into place with a ligature (Instead of waiting for it to come in on its own like when we were kids)). So off I went to an oral surgeon. He locally anesthetized my gum, extracted the baby tooth, and attached an appliance to the tip of the adult tooth so an orthodontist could attach a ligature to it later.
Then I went to the orthodontist who applied braces to all my teeth, attached a ligature to the adult tooth in my gum, and connected it to the wire going across my uppers. It took a long time to get that damn adult tooth to come down (over a year), but it finally did and after wearing those braces for 5 years, I now have really nice teeth, and a good bite.