Ultrasonic dental curettage definitely sounds like the best choice if you have to have this procedure done. I imagine there could be complications from having gum surgery where you cut into the gum and rotate it.
I wonder if a lot of people get infections from having this done? I imagine flushing the mouth with a sterile solution is enough to prevent most infections, but I bet it could still happen. I guess you just have to do what your dentist tells you to do as far as taking care of your gums after getting something like this done.