Will whitefilling be destroyed if my teeth move? - after brace

[Danay4]

Hi there,
After having a band fitted to my front two teeth to rid me of a diastema, treatment scope was to build up the neighbouring lateral two teeth with composite white filler, purely because in my case it is not possible to use orthodontics :/

My concern is that if these two lateral teeth are built up, will the two front teeth move back and crack/destroy the filler?

Thanks in advance
Danny