Frontalis muscle, temples, and eyebrow/lid muscles look increasingly clenched and prominent - would Botox help?

I have severe TMJ that progressed into degenerative arthritis, and am going to get jaw joint replacement surgery in the next year and a half. Because of my jaw bone resorption, I've lost height of my face, and the muscles of my neck, head, face and shoulders have had to compensate. Because of this I have noticed my frontalis muscle of my forehead, mytemples, and eyebrow/lid muscles increasingly clenchedand prominent. Would botox help, and if so, where?