Bimaxillary Orthognathic Surgery
Combined upper and lower jaw repositioning for severe dentofacial deformity
This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.
This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Ağız ve Diş Sağlığı department. Book Appointment →
What is Bimaxillary Orthognathic Surgery?
Bimaxillary orthognathic surgery (also called double-jaw surgery) is indicated for severe skeletal class II or class III malocclusions, vertical maxillary excess, anterior open bite, transverse maxillary deficiency, asymmetry, and obstructive sleep apnea unresponsive to conservative therapy. Combined surgery enables three-dimensional movement of both jaws to optimize occlusion, facial esthetics, and upper airway dimensions.
Preoperative preparation includes 12-18 months of orthodontic decompensation with fixed appliances or clear aligners to align teeth on the basal bone, allowing precise surgical movement. Virtual surgical planning (VSP) using CT-derived 3D models, digital intraoral scans, and CAD/CAM-fabricated splints enables sub-millimeter precision in jaw positioning, custom plate design, and predictable outcomes.
The maxilla is repositioned via Le Fort I osteotomy (advancement, impaction, expansion, segmentation), and the mandible is repositioned via bilateral sagittal split osteotomy (BSSO) for advancement or setback. Genioplasty (chin osteotomy) is frequently combined for chin position refinement. Modern rigid fixation with titanium plates and screws permits early mobilization, soft diet, and rapid functional recovery.
Symptoms
Risk Factors
When to See a Doctor?
If you experience any of the following symptoms, seek medical attention promptly:
- Severe malocclusion not correctable with orthodontics alone
- Significant facial asymmetry or skeletal disproportion
- Functional impairment in chewing or speech
- Obstructive sleep apnea with maxillomandibular deficiency
- Temporomandibular joint dysfunction associated with skeletal disharmony
- Anterior open bite
- Gummy smile from vertical maxillary excess
- Posttraumatic deformity
- Cleft lip and palate residual deformity
- Quality-of-life impairment from facial appearance
- Failed prior orthodontic treatment
- Considering jaw surgery for esthetic and functional concerns
Treatment Methods
Which Department to Visit?
You can visit our Ağız ve Diş Sağlığı department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.
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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.