A 17-year-old female patient presented with sequelae to ankylosis of
the temporomandibular joint, which included vertical maxillary protrusion,
anterior open bite, labial incompetence, micrognathia, undefined
neck angle, facial asymmetry, Class II molar relationship, and
Class III canine relationship. She presented with the following cephalometric
and soft tissue data: SNA angle = 78 degrees, SNB angle = 70
degrees, incisor-nasion-point A = 11 degrees, incisor-nasion-point B =
33 degrees, Frankfort-mandibular plane angle = 43 degrees, occlusal
plane = 25 degrees, subnasale-stomion = 20 mm, stomion
superius–stomion inferius = 9 mm, stomion inferius–soft tissue menton
= 30 mm, neck angle = 144 degrees, and chin projection = 10 mm.
Orthognathic surgery and mandibular osteogenic distraction were
employed, specifically Le Fort I osteotomy to decrease a vertical excess
of 12 mm, augmentation genioplasty of 17 mm, and bilateral extraoral
distractors of bidirectional vector for a 14-mm augmentation of
the mandible. The result was satisfactory with minimal adverse complications.