I've gotten lots of fillings, two crowns, and a root canal in my 40 years, and I never got the numbness in the tongue until I got filling a couple of years ago. My tongue was numb for about 6 months, but recovered fully.
I just had a small filling replaced today, and, as the dentist was injecting my lower left jaw with Novacaine, I felt intense pain in the left side of my tongue. I have a pretty high threshold of pain, but I just about cried.
So, my tongue is still numb. Considering how much pain I was in, I have to assume that he did a real number on my lingual nerve.
My question is, should I find a new dentist? This guy has only given me 4-5 injections, and he's injured my lingual nerve twice. Not very good odds.
If the numbness isn't gone in a few days I'll give him a call. What a nuisance.