Was the dentist correct or am I just fretting?

[MamaB7]

My child had a filling a while ago now and everything has been fine, but I recently noticed that a part of the tooth has fallen away, (the filing is still intact).
The dentist said that he wasn't going to do anything about it as the filling is still intact, I asked what would happen if the filling came out and he said he'd just fill it again..
Am I just being a over cautious parent and worrying about tooth care?

How old is your child? Is it a milk tooth?

@peterparkersays.
10yrs old, and yes, I think he said it was a baby tooth.

The deciduous teeth don't have much longer to last now, sometimes fillings/teeth break and it's a sort of risk benefit analysis to see whether it needs fixing. Will it cause problems? Unlikely, if you actively intervene, is there a risk (of toothache, phobia developing etc) probably. Your dentist will have weighed that all up and come to the conclusion.

If it was your tooth and you had to pay £48 for the filling on a tooth that was unlikely to cause you a problem and wasn't giving you any symptoms, what would you do?

I wouldn't worry if it's going to come out anyway, so long as the filling stays in place and it doesn't cause your child discomfort.

Okay, thanks to both! I've been doing a little research and the primary second molars usually erupt between 9-12yrs. I'm hoping it doesn't cause any discomfort in the mean time.
That's put my mind at rest for now. :)