Will rubber bands mess up my jaw/chin?

Currently I have an overbite and it is quite visible as a weaker jaw and a chin that looks recessive. I notice that pushing my lower jaw forward myself, fixing the overbite while keeping it like that, makes my face look a lot better. I've had braces for half a year now and I'm about to get rubber bands. My question is, will those rubber bands mess up my face shape and make it look, permanently, like it does without me pushing my lower jaw forward?

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