Will miniscrew implants change my face shape?

[Jen42]

My braces were supposed to come off a little while ago, but even after 8 months I can't put my front teeth together. My orthodontist said that a miniscrew implant on the roof of my mouth could help with that - the plan is to pull my back molars up a bit by attaching them to a metal bar which is then bound to the implant with wires. If anyone's had something like this done, could you let me know if anything happened? Thanks in advance.