Mandibular and Maxillary Osteotomy: Achieving Jaw Alignment and Facial Harmony
A mandibular and maxillary osteotomy is a specialized orthognathic surgery designed to correct significant jaw alignment discrepancies. These procedures involve precise bone cuts to reposition the upper (maxilla) and lower (mandible) jaws, resolving functional issues like bite problems and improving overall facial balance. Key techniques include the Bilateral Sagittal Split Osteotomy (BSSO) for lower jaw surgery and the Le Fort I osteotomy for upper jaw repositioning. Understanding these bone cuts and their application is crucial for patients considering corrective jaw surgery to achieve improved function and facial harmony.
Mr Shilen Patel, an award-winning Oral and Maxillofacial Consultant Surgeon, offers expert assessment and advanced surgical solutions for complex jaw conditions. His dual medical and dental training ensures comprehensive care in orthognathic surgery and facial reconstruction.
To explore your options, contact us to schedule your consultation. You can also reach us via: Arrange your facial balance consultation
A mandibular and maxillary osteotomy is a corrective jaw surgery performed by an oral and maxillofacial surgeon to realign the upper and lower jaws for improved function and facial harmony. These procedures, also known as orthognathic surgery, address issues related to bite, breathing, and facial structure.
What Are Mandibular and Maxillary Osteotomies in Jaw Surgery?
An osteotomy is a surgical procedure where a bone is cut for repositioning. In orthognathic surgery, this involves the jawbones—the mandible (lower jaw) and the maxilla (upper jaw). This restructuring resolves significant discrepancies in jaw alignment and size that cannot be corrected with orthodontics alone.
The Goal of Jaw Osteotomy
The goal of a jaw osteotomy is to change a bone’s alignment to improve its function and aesthetics. By cutting the bone, a surgeon can move a jaw segment forward, backward, up, down, or rotate it into an ideal position. This corrects bite problems and improves facial balance.
Key Differences: Lower vs. Upper Jaw Repositioning
The procedures differ by which jaw is addressed. A mandibular osteotomy targets the lower jaw to correct an underbite or a recessed chin. A maxillary osteotomy focuses on the upper jaw to address an overbite, a “gummy” smile, or a deficient midface. Often, both procedures are performed together for a comprehensive result.
Mandibular Osteotomy (BSSO) and Maxillary Osteotomy (Le Fort I)
Two common orthognathic surgery techniques are the Bilateral Sagittal Split Osteotomy (BSSO) for the lower jaw and the Le Fort I Osteotomy for the upper jaw. Each involves specific bone cuts to mobilise the jaw for repositioning.
Bilateral Sagittal Split Osteotomy (BSSO): Correcting the Lower Jaw
The BSSO is the standard procedure for most lower jaw surgery. The surgeon cuts both sides of the mandible, splitting the bone to allow the tooth-bearing portion to be moved forward or backward without affecting the jaw joint. This technique is versatile for correcting a protruding lower jaw (mandibular prognathism) or a receding lower jaw (mandibular retrognathism).
Le Fort I Osteotomy: Reshaping the Upper Jaw
The Le Fort I osteotomy is the principal method for upper jaw surgery. The surgeon makes a horizontal cut in the maxilla above the tooth roots. This frees the entire upper jaw, including the roof of the mouth and upper teeth, as a single block. This segment can then be moved in any direction—upward to correct a gummy smile, forward to address a deficient midface, or widened to resolve a crossbite.
Why Are Mandibular and Maxillary Osteotomies Performed?
Mandibular and maxillary osteotomies address functional impairments and aesthetic concerns. An oral and maxillofacial surgeon determines the need for surgery based on the jaw’s impact on a patient’s life and facial structure.
Addressing Functional Jaw and Bite Issues
Corrective jaw surgery is often for functional reasons. A misaligned bite, or malocclusion, can cause chewing difficulties, uneven tooth wear, and speech impediments. Poor jaw alignment can also contribute to obstructive sleep apnoea by compromising the airway. For patients with temporomandibular joint (TMJ) disorders, realigning the jaws can alleviate chronic pain and dysfunction by creating a more stable musculoskeletal system. You can learn more in our guide to orthognathic surgery.
Enhancing Facial Balance and Aesthetics
These procedures also improve facial harmony. A recessed chin, a protruding lower jaw, or facial asymmetry can impact a person’s profile and self-confidence. Repositioning the jawbones improves the proportions of the lower and mid-face, enhances jawline definition, and creates a more balanced profile.
Modern Jaw Surgery: Planning and Fixation
Orthognathic surgery has advanced from 2D planning to computer-guided methods, improving predictability and safety.
Virtual Surgical Planning (VSP)
Modern jaw surgery uses virtual surgical planning (VSP). Using 3D CT scans, surgeons perform the operation virtually before surgery. The software allows precise planning of bone cuts and final jaw positions to the millimetre. From this digital plan, custom surgical guides or splints are 3D-printed. These guides fit the patient’s teeth, ensuring planned movements are executed accurately.
How Bones Are Secured: Plates, Screws, and Stability
Repositioned jawbones are secured for healing using small titanium fixation plates and screws. These are placed internally and are not visible. Patients often ask if the plates can be felt or will set off metal detectors. Usually, they are not palpable and are too small to be detected by airport security. According to research in the Journal of Oral and Maxillofacial Surgery, rigid internal fixation is a reliable method that promotes stable healing and allows a quicker return to jaw function. (Source: JOMS). The plates are permanent and are not removed unless an issue arises.
Expert Care and Recovery: What to Expect from Your Jaw Osteotomy
Jaw surgery requires management by a specialist.
The Surgical Journey with a Consultant Oral & Maxillofacial Surgeon
A consultant oral and maxillofacial surgeon with dual qualifications in medicine and dentistry understands the entire facial structure. This expertise is critical for a mandibular and maxillary osteotomy. The process begins with an assessment, including imaging and bite analysis, to create a personalised treatment plan. This consultant-led approach integrates all aspects of care, from orthodontics to the final surgical result. For more details, see our overview of orthognathic surgery.
Recovery Process
Recovery is a gradual process. The surgery is performed under general anaesthesia. Patients can expect significant facial swelling for the first 1-2 weeks, which subsides over several months. A soft or liquid diet is necessary for 4-6 weeks to allow the bones to heal. Although serious complications are uncommon with an experienced surgeon, risks include infection, bleeding, and temporary or, rarely, permanent numbness in the lips or chin from nerve bruising. As noted by the British Association of Oral and Maxillofacial Surgeons (BAOMS), careful surgical technique minimises these risks.
Achieve Facial Harmony: Schedule Your Expert Consultation Today
Corrective jaw surgery can improve bite function, relieve pain, and enhance facial balance. A personalised assessment with a specialist is essential to explore options and develop a treatment plan.
If you are considering jaw surgery for functional or aesthetic concerns, arrange your facial balance consultation for an expert evaluation from Mr Shilen Patel. For further inquiries, please contact us.
Frequently Asked Questions
What is the purpose of a mandibular and maxillary osteotomy?
A mandibular and maxillary osteotomy is a type of corrective jaw surgery, also known as orthognathic surgery. The purpose is to cut and reposition the jawbones to correct functional problems like a misaligned bite and to improve overall facial harmony. This procedure addresses significant skeletal discrepancies that cannot be resolved with orthodontics alone.
When is a combined mandibular and maxillary osteotomy necessary?
A combined mandibular and maxillary osteotomy, or double jaw surgery, is performed when a patient has a complex misalignment involving both the upper and lower jaws. This comprehensive approach allows the surgeon to make precise three-dimensional corrections for issues like significant facial asymmetry, an open bite, or a severe underbite. It provides the greatest degree of functional and aesthetic improvement.
How are the jaws secured after a mandibular and maxillary osteotomy?
After a mandibular and maxillary osteotomy, the repositioned jaw segments are held in their new, stable position using small titanium plates and screws. These medical-grade fixtures are biocompatible and designed to integrate with the bone as it heals. They are typically left in place permanently and do not cause issues for the patient.
What does recovery from corrective jaw surgery involve?
Recovery from this type of jaw surgery involves an initial period of swelling and a modified, soft diet to allow the bones to heal properly. Patients typically stay in the hospital for one to two nights for monitoring. Most individuals can return to non-strenuous work or school within two to four weeks, though full healing and final results will take several months.
How do I know if I am a candidate for this jaw surgery?
The first step is to schedule a detailed assessment with a specialist oral and maxillofacial surgeon. During this consultation, your facial structure, bite, and functional concerns will be evaluated using advanced imaging to determine if you are a suitable candidate. You can arrange your facial balance consultation to discuss your specific needs and treatment options.
