Wondering whether a heavy or square jawline calls for an injection or an operation? At our plastic surgery clinic in Las Vegas, the first question is not which treatment — it is which structure. Muscle, bone, fat and lax skin all widen the lower face, and only one of them responds to a neuromodulator. A new guide covers what the twelve-month evidence shows, why grinding and clenching change how long any result holds, and how a board-certified facial plastic surgeon who is also a Diplomate of the American Board of Sleep Medicine sorts the causes. Tap Learn More for the full decision guide.