What is this dental procedure called

I was told there was some extra gum tissue that needed to be removed while I was in the dentist chair. (I was told it was possibly from having my wisdom teeth removed years ago). I said ok and it was removed. It took about 15 minutes and no scalpels were used. Then when I went to pay I was charged almost $500 for crown lenghtening. I have researched this procedure and I do not believe that is what was done. No scalpel was used, no sutures in my mouth, no prescription mouthwash or any prescriptions given. Actually the follow up care suggested was to brush it until it bleeds to make the area stronger. I did this once but the more I think about it seems like an awful idea, it would just push bacteria into the wound. Also, the healing times I have read for crown lengthening are like 3 months. I made an appointment to have the crown placed in 2 weeks.

Is this procedure some other form of crown lengthening that I can't find anything about, or some other procedure? How much should it cost

I have to disagree with the Katie person who answered. I have been a dental assistant for 10 years, and have assisted on many crown lengthening procedures. It is not a major deal as she said. The fact that he didn't use a scalpel does not mean that he didn't do it. Many dentists, including the one I work for, use a laser to do this procedure since it decreases bleeding and makes a cleaner work environment. Crown lengthening is done to basically do exactly what it says: lenghten the crown of the tooth. It exposes more of the tooth structure so that there is more for a crown to fit onto. You shouldn't need sutures for this procedure. However, I always give patients who have this done an antibacterial mouth rinse to take home with them, and I have never heard of the idea of brushing the area till it bleeds, making it stronger. Hmmmmm. Don't know about that one.