When Sleep Apnea Has a Structural Cause
Obstructive sleep apnea (OSA) is a condition in which the airway partially or completely collapses during sleep, causing repeated interruptions in breathing. These episodes can happen many times through the night, disrupting sleep quality and placing strain on the cardiovascular system over time.
For many people, the root cause of OSA is not simply excess weight or lifestyle — it is the underlying anatomy of the jaw and throat. When the upper jaw (maxilla), lower jaw (mandible), or both are positioned further back than ideal, the airway behind the tongue and soft palate becomes narrowed. This narrowing is the site where obstruction most commonly occurs. Many times there can be some obstruction in the nasal air passage, which can also restrict the amount of air we can inhale comfortably.
In these patients, treatments that do not address the jaw position — such as positional therapy or even continuous positive airway pressure (CPAP) — may offer only partial or temporary relief. Maxillomandibular advancement surgery aims to address the structural problem directly.
What Is Maxillomandibular Advancement?
Maxillomandibular advancement — often referred to as MMA surgery — is a form of orthognathic surgery, meaning surgery that repositions the jaws. In this procedure, both the upper jaw and the lower jaw are surgically moved forward simultaneously, expanding the skeletal framework that supports the airway.
Orthognathic surgery has long been used to correct bite problems, facial asymmetry, and jaw discrepancies. MMA applies the same surgical principles with a specific focus on increasing airway dimensions. By moving the bony structures of the face forward, the soft tissues attached to them — including the tongue, soft palate, and surrounding muscles — are also carried forward, reducing the tendency for these tissues to collapse into the airway during sleep.
The procedure is performed under general anaesthesia and typically requires a hospital stay. It is carried out by an oral and maxillofacial surgeon with experience in complex jaw surgery.
How Moving the Jaws Forward Opens the Airway
The upper and lower jaws form the bony scaffold on which the throat and tongue are anchored. When both jaws sit further back in the face than is structurally optimal, this scaffold pulls the soft airway tissues backward as well — particularly when the muscles relax during sleep.
By advancing the maxilla and mandible together, MMA effectively enlarges the space behind the tongue and behind the soft palate. This is the region most commonly responsible for the obstruction in OSA. The increase in airway volume reduces the likelihood that soft tissues will collapse and block airflow during the night.
The degree of advancement planned is tailored to each patient, taking into account their specific anatomy, the severity of their OSA, and facial proportions. Careful pre-surgical planning — often involving imaging, dental models, and jaw movement analysis — is essential to achieving both a functional airway improvement and an acceptable facial cosmetic outcome.
Who May Be a Candidate for MMA Surgery?
MMA surgery is generally considered for adults with confirmed obstructive sleep apnea who have a jaw anatomy that is contributing to their airway obstruction. A sleep study establishing the diagnosis and severity of OSA is typically the starting point.
Candidates are often patients who have not responded adequately to CPAP therapy, or who cannot tolerate CPAP long-term. Oral appliance therapy, which repositions the lower jaw during sleep, may also have been tried and found insufficient. In patients where the jaw structure is the primary driver of obstruction, MMA offers a more lasting correction than appliance-based options.
Age, overall health, bone quality, and dental status are all relevant factors in candidacy. A thorough evaluation by an oral and maxillofacial surgeon — often in collaboration with a sleep physician — is needed to determine whether MMA is appropriate for a particular patient. Not everyone with OSA is a surgical candidate, and the decision is always made on an individual basis.
The Procedure and Recovery
MMA surgery is performed under general anaesthesia. The surgeon makes carefully planned cuts in the jawbones, moves them forward to the pre-determined position, and secures them with small titanium plates and screws. Both jaws are repositioned in the same procedure, which typically takes several hours.
The immediate post-operative period involves swelling, bruising, and discomfort, which are expected and gradually resolve over a number of weeks. Patients are placed on a modified diet — beginning with liquids and progressing to soft foods — as the jaw heals. The bones take time to consolidate fully, and full dietary freedom is restored gradually over the months following surgery.
Hospitalisation for at least a day or two is standard. Most patients require a recovery period at home of several weeks before returning to normal activity, though this varies with each individual. Follow-up appointments are an important part of the process, allowing the surgical team to monitor healing, jaw position, and any changes in sleep apnea symptoms.
Risks and Possible Complications
As with any surgical procedure, MMA carries risks that patients should understand clearly before making a decision. The most commonly experienced side effect is temporary numbness affecting the lips, chin, or cheeks. This occurs because the nerves supplying sensation to these areas run close to the surgical site. In most cases, sensation gradually returns over weeks to months. In a smaller number of patients, some degree of altered sensation may persist longer term.
Swelling and bruising of the face are expected in the weeks following surgery and generally resolve with time. Infection and bleeding are possible with any surgery and are managed with appropriate precautions before and after the procedure.
The forward movement of the jaws will produce a visible change in facial profile for most patients. This change is planned as part of the surgical process, and for many patients it is considered an acceptable or even welcome outcome. However, it is important that patients are aware their appearance will change and have discussed this fully with their surgeon.
Relapse — meaning partial movement of the jaws back toward their original position over time — is also a known possibility. The degree of stability achieved varies between patients and depends on several factors including the amount of advancement, the fixation used, and how the patient heals. This is something to discuss in detail with your surgeon during the planning phase.
Dr. Vikram PanditMMA surgery is among the most effective structural interventions for appropriately selected patients with obstructive sleep apnea driven by jaw anatomy. Careful planning, realistic expectations, and close follow-up are what make the difference between a good outcome and a great one.
Realistic Outcomes and When MMA Is Considered
For patients who are well-selected and who undergo thorough pre-surgical planning, MMA can meaningfully reduce the frequency and severity of obstructive events during sleep. Outcomes vary from patient to patient, and results depend on the degree of jaw advancement achievable, individual anatomy, and other contributing factors such as soft tissue volume.
MMA is not typically a first-line treatment for OSA. It is most commonly considered when conservative measures — CPAP, oral appliances, weight management where relevant — have been found inadequate or are not tolerated, and when jaw anatomy has been identified as a significant contributor to the obstruction.
It is also considered as part of comprehensive treatment planning for patients who already have jaw discrepancies requiring orthognathic correction, where OSA is an additional indication. In these cases, addressing both the functional airway concern and the jaw alignment in a single procedure can be appropriate.
The decision to proceed with MMA should involve a sleep medicine specialist, an oral and maxillofacial surgeon, and the patient — with enough time given to understand what surgery involves, what the expected changes to the face will look like, and what follow-up will be required.
Frequently Asked Questions
Taking the Next Step
If you have been diagnosed with obstructive sleep apnea and have been told — or suspect — that the structure of your jaws may be a contributing factor, a consultation with an oral and maxillofacial surgeon is a sensible starting point. Understanding whether you are a candidate for MMA surgery, what the procedure would involve for your specific anatomy, and what outcomes are realistic for your situation requires a proper assessment — not a website.
At Pandit Clinic in Pune, Dr. Vikram Pandit brings specialist training in orthognathic and craniofacial surgery to the evaluation and management of patients with jaw-related concerns, including those being assessed for surgery related to sleep-disordered breathing. Consultations are available by appointment.
Dr. Vikram Pandit
BDS, MDS Oral & Maxillofacial SurgeonMeet the Doctor
BDS, MDS Oral & Maxillofacial Surgeon
Dr. Vikram is a visiting consultant and consultant oral and maxillofacial surgeon at the top hospitals in Pune like Poona Hospital and Research Centre, Ratna Memorial Hospital, Pandit Clinic and KEM Hospital. Dr. Vikram has done clinical fellowship in craniofacial surgery with focus on surgery for cleft lip and palate deformities, orthognathic surgery and surgery for sleep related disordered breathing (SRDB). He has trained for advanced management for Facial Trauma, from Taiwan. He has also attended various seminars and done workshops related to Oral and Maxillofacial Surgery. Dr. Vikram is also a co- author of a chapter for a textbook. He has been invited as a speaker for number of conferences in India as well as Internationally.
