How to change face shape on one side of my face?

My face is extremely asymmetric. My jaw is lower on my left side, as is my chin. My left cheek is flatter but somehow looks full from the right and my higher right cheek looks flat from the left (confusing!). My nose is deviated also. What bothers me is my jaw and face shape. I would like a more angular left jaw and fuller cheeks. My left jaw bone hooks down at the corner but the right side is smooth and angular. My dentist tells me I have big strong jaw muscles also. How risky is jaw shaving?