In cases of severe mandibular prognathism, where the lower jaw is excessively long or large, the jaw can be re-positioned backwards with jaw surgery. The jaw is sectioned with a mechanical saw under general anaesthesia, whilst avoiding the vital structures like the nerves and major blood vessels. The sectioned pieces are then re-assembled in the desired position, and secured in place using titanium bone plates and screws. The fractured bone then heals in about two months. These bone plate & screws can be removed, if desired (for religious reasons), some months after the bone has healed, or left in place. Incisions are usually made within the mouth, so the scars will be well-hidden.
See also: Lip prominence