Residual deformities are such defects that are observed even after the primary surgical management and need further cosmetic and functional intervention for an outcome. Deformity correction is the surgical adjustment or modification of bone that grows incorrectly as the result of a disease or condition, such as bowlegs or knock knee. Deformity correction is a procedure to straighten a bone that is bent or twisted in a way that is not normal. After the bone is straightened, the arm, leg, or foot has normal alignment and function.This deformity can be treated by osseous genioplasty, or bony chin advancement, which is a simple procedure that moves a patient's own chin.