Will extracting 4 premolars change my face shape?

will extracting 4 premolars change my face shape? I want high cheekbones and a more symmetrical face. I will hopefully be getting braces for a second time within the next month. I previously had them for 5 years on treatment for my overbite. i am also worried about having braces for a second time for another 15 months. will my teeth be too weak? I also have a missing tooth, and will be getting a dental implant placed after my braces treatment.