Yeah, I forgot to say that there was no reference to any "counting." That was the only 'bugs on teeth' I found and I'm not putting anymore effort in to that enthralling topic.
I looked after your post. There are pediatric dentists across the nation named Sugar Bugs, but with no explanation of the critters. Now know the truth, the whole thing creeps me out a bit.
The kid who told me this tale probably got the facts mixed up. I never paid attention to it anyway.... Harry
That kid's parents were trying to skate on their Tooth Fairy obligations. "The Bug" said they're all there. No quarter for you!!