Tooth displacement due to plaque

[Oddtimeflex]

I have a lingual brace behind my front bottom teeth, which remained there for many years now (my dentists never recommended removing it).

I haven't been to cleaning for a while and plaque (tartar) accumulated between the brace and the teeth as well as between the teeth themselves (it's hard to clean there).

Now that I've got them cleaned, it looks like they are more separated than they use to be, as well as a bit separated from the brace, probably because the plaque pushed them apart.

Now I'm wondering whether they will return to their original position over time, despite or because or even regardless of the brace, or whether there needs to be an orthodontic intervention in order to pull them back.

Thanks!