What is a chin implant? January 25, 2023 Improving someone’s physical appearance is possible thanks to the numerous advances in cosmetic science. One way to boost your physical appearance is to undergo chin surgery. The shape of your chin enhances your overall facial features and balances the appearance of your nose. Mentoplasty, otherwise known as chin surgery, can alter the shape of your chin by using a special implant to add shape to the chin, increase the projection of the chin, or augment the underlying bone of the chin. For smaller changes, an implant may be ideal. However, for more dramatic change, cutting, moving, and placing a titanium plate to hold the bone in a new position is often required.