What is Bimaxillary Osteotomy (2026 Guide)

Bimaxillary Osteotomy, commonly known as Double Jaw Surgery, is a complex yet highly transformative type of orthognathic surgery that simultaneously corrects severe misalignments in both the upper jaw (maxilla) and the lower jaw (mandible). This precise, highly planned surgical procedure is typically performed by a skilled maxillofacial surgeon to address functional issues such as severe malocclusion (bad bite), difficulties with chewing, and obstructive sleep apnea (OSA)—while also achieving significant and permanent improvements in facial aesthetics and profile balance. The integration of advanced 3D imaging and virtual surgical planning in 2026 ensures unprecedented accuracy in repositioning the jaws to their optimal anatomical position.

Key Facts About Bimaxillary Osteotomy

This comprehensive table offers a quick guide to the most important aspects of Bimaxillary Osteotomy.

Aspect	Detail	Featured Snippet Focus
Medical Name	Bimaxillary Osteotomy	What is Bimaxillary Osteotomy?
Common Name	Double Jaw Surgery
Purpose	Correct severe skeletal discrepancies and functional issues in both the maxilla and mandible.	Improves bite, chewing, and facial harmony.
Key Procedures	Le Fort I Osteotomy (Upper Jaw) and Bilateral Sagittal Split Osteotomy (BSSO) (Lower Jaw).
Anesthesia	General Anesthesia
Incision Location	Almost entirely inside the mouth (intra-oral).	No visible external scars.
Fixation Method	Small, biocompatible titanium plates and screws.	Ensures permanent, stable fixation.
Typical Hospital Stay	2–4 days
Initial Recovery	2–3 weeks (for significant reduction in swelling and return to light activities).
Full Bone Healing	6–12 months	When can I eat normally?
Overall Success Rate	Nearly 94%

What is Bimaxillary Osteotomy?

Bimaxillary Osteotomy is a combined surgical procedure involving the repositioning of both the upper jaw (maxilla) and the lower jaw (mandible). Unlike single jaw surgery, which addresses an abnormality in only one jaw, double jaw surgery is reserved for more complex cases where both jaws are misaligned relative to each other and the overall cranial base.

The procedure is fundamentally about correcting a skeletal imbalance that cannot be fixed by orthodontics (braces) alone. By cutting (osteotomy) and meticulously moving the bones, the surgeon can achieve a functional and aesthetic equilibrium. The repositioned jaw segments are then stabilized with tiny, permanent titanium plates and screws.

What Are Conditions Treated with Bimaxillary Osteotomy?

Bimaxillary Osteotomy offers a transformative solution for a variety of severe skeletal and functional problems. Patients typically require this surgery when non-surgical treatments have proven insufficient.

Key conditions treated by double jaw surgery include:

Severe Malocclusion:
- Overbite (Class II Malocclusion): A significantly retruded (recessed) lower jaw or a protruding upper jaw.
- Underbite (Class III Malocclusion): A protruding lower jaw or a recessed upper jaw.
- Open Bite: When the upper and lower front teeth do not overlap when the mouth is closed, making chewing difficult.
Facial and Skeletal Imbalance:
- Significant facial asymmetry or disproportion.
- Long Face Syndrome or an abnormally small chin (microgenia) associated with jaw recession.
- Correction of a “gummy smile” (excessive gingival display).
Functional Impairments:
- Chronic Temporomandibular Joint (TMJ) disorders and chronic jaw pain related to incorrect jaw position.
- Severe difficulty with chewing, biting, or swallowing.
- Obstructive Sleep Apnea (OSA): Advancing both jaws helps to open the pharyngeal airway, significantly improving breathing and sleep quality.

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The Surgical Process of Double Jaw Surgery (Bimaxillary Osteotomy)

The entire journey of double jaw surgery is a multi-stage process involving precise preparation, the operation itself, and a structured recovery.

Pre-Surgical Planning of Bimaxillary Osteotomy Operation

This phase is critical for the success and accuracy of the orthognathic surgery. It is a collaboration between the oral and maxillofacial surgeon and the orthodontist.

Pre-Surgical Orthodontics: Typically lasts 12–18 months. Braces are used to straighten the teeth and align them properly within each jaw arch so they will fit together correctly after the jaws are moved.
Diagnostic Imaging: Includes panoramic X-rays, cephalometric X-rays, CT scans, and 3D imaging to capture the complete skeletal structure.
Virtual Surgical Planning (VSP): The surgeon uses advanced 3D software to virtually plan the exact cuts (osteotomies) and the precise final position of both the maxilla and the mandible. This ensures optimal functional and aesthetic outcomes.
Surgical Guide Fabrication: Custom-made surgical guides and splints are often 3D-printed based on the VSP to be used during the operation for maximum accuracy.

The Bimaxillary Osteotomy Surgery Itself

The procedure is performed under general anesthesia in a hospital setting and generally lasts between 4 and 6 hours.

Upper Jaw Surgery (Le Fort I Osteotomy): An incision is made in the gum tissue above the upper teeth. The maxilla is cut above the roots of the teeth, allowing the surgeon to move it forward, backward, upward, or downward.
Lower Jaw Surgery (Bilateral Sagittal Split Osteotomy – BSSO): Incisions are made inside the cheeks near the wisdom teeth. The mandible is split on both sides behind the molars, enabling the surgeon to slide the bone segments into the new, corrected position.
Fixation: The repositioned jaw segments are secured using small, custom-bent titanium plates and screws. These are biocompatible and usually remain in place permanently.
Closure: The incisions are closed with dissolvable stitches, leaving no visible external scars.

Hospital Stay for Bimaxillary Osteotomy

Patients typically remain in the hospital for 2–4 days for monitoring and initial recovery. During this time:

Swelling is at its peak (usually 48–72 hours post-op). Ice packs are used to manage this.
Pain management is administered intravenously and then orally with prescribed medication.
The patient is restricted to a liquid diet to ensure proper healing.

Recovery After Bimaxillary Osteotomy

Recovery after Bimaxillary Osteotomy is a gradual process that requires patience and strict adherence to post-operative instructions.

First Week: Rest is paramount. Expect significant swelling and temporary numbness around the lips, chin, and cheeks. A strict liquid-only, no-chew diet is mandatory.
Weeks 2–3 (Initial Recovery): Most patients can return to light work or school as swelling significantly decreases. The diet transitions to pureed and blended soft foods.
Weeks 4–6: The soft diet continues. The jaw begins to stabilize, and patients may start gentle jaw opening exercises.
3–6 Months: The patient returns to a near-normal diet, avoiding hard or crunchy foods. Nerve recovery continues, and any lingering numbness gradually resolves.
6–12 Months (Full Healing): Final bone healing is complete. Post-surgical orthodontics are finalized to perfectly fine-tune the bite, which may take another 6 months.

Benefits of Bimaxillary Osteotomy

The benefits of double jaw surgery are both functional and aesthetic, leading to a profound improvement in a patient’s quality of life.

Improved Chewing and Bite Function: Corrects severe malocclusion, allowing the teeth to meet properly for efficient chewing.
Enhanced Breathing: Widens the posterior airway, providing significant relief for sufferers of Obstructive Sleep Apnea (OSA) and chronic mouth breathing.
Significant Aesthetic Improvement: Creates facial harmony and balance, correcting a receding chin, protruding jaw, or severe facial asymmetry.
Reduced Jaw Pain: Alleviates chronic pain associated with jaw misalignment and TMJ disorders.
Permanent Results: Once healing is complete and the jaws are fused, the results of the surgery are permanent and stable.

What Are Risks and Considerations of Bimaxillary Osteotomy?

While Bimaxillary Osteotomy has a high success rate, as with any major surgery, there are potential risks and considerations:

Temporary Numbness: The most common side effect. Temporary numbness (paresthesia) of the lower lip, chin, or upper lip is expected due to nerve manipulation and generally resolves over several months.
Risk of Permanent Numbness: A small risk of permanent altered sensation or numbness exists (less than 1–2%).
Infection: Risk of post-operative infection at the surgical site, manageable with antibiotics.
Relapse: In rare cases, the jaw may shift slightly toward its original position, necessitating minor orthodontic or surgical adjustment.
Non-Union/Mal-Union: Failure of the bone to heal correctly, which is extremely rare but may require a second surgery.

Why Choose Hospitaprime for Bimaxillary Osteotomy?

Choosing the right facility and surgical team is paramount for a successful and safe Bimaxillary Osteotomy. At Hospitaprime, our commitment to patient safety and superior outcomes is unmatched.

Expert Maxillofacial Surgeons: Our surgeons are internationally recognized specialists with extensive experience in complex orthognathic surgery and a proven track record of successful double jaw surgery outcomes.
Advanced 3D Planning: We utilize cutting-edge Virtual Surgical Planning (VSP) technology to ensure the highest degree of surgical precision and predictable facial aesthetics.
Comprehensive Care Model: We offer a seamless process from pre-surgical orthodontic coordination to post-operative physical therapy and long-term follow-up.
Patient-Centric Approach: We prioritize patient comfort, using advanced pain management protocols and ensuring a smooth hospital stay and recovery.

Frequently Asked Questions About Bimaxillary Osteotomy

Is bimaxillary osteotomy painful?

While it is a major surgery, post-operative pain is typically well-controlled with prescribed oral pain medication. Most patients report that the discomfort is manageable and often less severe than anticipated. The primary discomfort comes from swelling and the restricted diet, not intense pain.

How long does recovery from bimaxillary osteotomy take?

Initial recovery, where swelling significantly subsides and you can return to light work, takes about 2 to 3 weeks. However, full bone healing and resolution of residual swelling can take 6 to 12 months.

Will there be visible scars after double jaw surgery?

No, in the vast majority of cases, there are no visible external scars. The surgical incisions (osteotomies) are performed entirely inside the mouth (intra-orally).

Can I eat normally after bimaxillary osteotomy?

You will be on a strict liquid or pureed no-chew diet for the first 4 to 6 weeks to allow the bones to heal. Normal chewing gradually resumes over several months, with a full return to a normal diet often taking 6 months or more.

Who is a good candidate for bimaxillary osteotomy?

A good candidate is a non-smoking individual with skeletal discrepancies (jaw misalignment) that cannot be corrected by orthodontics alone, is in good overall health, and whose jaw growth is complete (typically in the late teenage years). Conditions like severe malocclusion, facial asymmetry, or obstructive sleep apnea often indicate a need for this surgery.

Are the results of bimaxillary osteotomy permanent?

Yes, the results are designed to be permanent. The jaws are physically cut, repositioned, and secured with titanium plates and screws, and once the bones fuse in their new position, the correction is stable and long-lasting.

What are the risks of bimaxillary osteotomy?

The primary risks include temporary or, rarely, permanent numbness of the lips or chin, infection, and potential jaw relapse. An experienced maxillofacial surgeon significantly minimizes these risks through meticulous planning and technique.

Does bimaxillary osteotomy also improve sleep apnea?

Yes, it is one of the most effective surgical treatments for Obstructive Sleep Apnea (OSA). By advancing both the maxilla and mandible, the procedure enlarges the airway in the throat, which substantially reduces the severity of sleep apnea.

How long does the surgery take?

The double jaw surgery procedure typically takes between 4 to 6 hours to complete, depending on the complexity of the required movements and the extent of the osteotomies.