Surgery of the Chin

An appropriate chin position and proportion results in an adequate lip–chin relationship, contributes to normal vertical proportions, and gives support to the submandibular soft tissues. A minimally invasive technique preserving as much periosteum and muscle tissue as possible, and their final repositioning, is essential in order to minimize unpredictable soft-tissue changes. When an osteotomy is performed, it is mandatory to avoid dental roots and mental nerve damage. Moreover, the inclination of the saw will determine the direction of sliding and thus the final position of the distal segment. When a gap remains between bony segments, an interpositional autograft, bone block allograft, or off-the-shelf material block can be placed in between.