I know it is a tough decision, but my 10.5 year old, 3.8 pound little girl has really nasty teeth (genetic) and we do a dental every 6 minths because that way it seems she does not lose teeth. Trying to keep the ones she has and I do fear an infection.
We have never had any trouble. She comes home ready to play!
Just be sure to ask if someone is there to constantly monitor your pup during the procedure - that is standard and expected protocol.
Best of luck to you