If that's their intention, they didn't do a good job ...
I don't know, I'm miss a LOT with this show and I picked up on that right away. It seemed clear to me that's what they were doing based on Miles' comments. However we probably won't ever know for sure, that's probably the extent of that particular incident. Unless Chang or somebody like that gets a flashback episode.
There are plenty of things I pick up on, that later turn out to be nothing.
Just because you picked up on it, doesn't mean that was their intention.
You could be right, but ..., I just think it's too far of a stretch. - like this guy is the only guy working over there who has had fillings? not likely.