Orthognathic Surgery Doesn't Look Like What People Expect
Most of the photos you see online are either pre-op malocclusion shots or late-term results with swollen faces still present. The actual transformation happens in layers over eighteen months or more, and the functional changes are almost always more dramatic than the cosmetic ones. I have followed patients through this process since the early 2010s, and the gap between what they think will happen and what actually does is where most of the frustration comes from. The procedure itself involves cutting either the maxilla, the mandible, or both, then repositioning the segments and fixing them with plates and screws. Le Fort I osteotomy for the upper jaw, bilateral sagittal split osteotomy or intramembranous wedge for the lower jaw. They do it under general anesthesia, usually as an inpatient stay of two to four days. The surgeon bicuspidizes the teeth first, runs a few months of pre-surgical orthodontics to decompensate the dentition, then operates. Post-surgical braces continue for another six to twelve months to settle the bite. What people miss is that the facial change isn't uniform across the thirds. A setback maxilla procedure typically reduces lower face height but doesn't do much for the nose unless there was a concurrent septoplasty or rhinoplasty component. A mandibular advancement shows the most visible profile change because it pulls the chin, the neck plane, and the soft tissue draping all at once. The asymmetry cases are the ones that look most shocking in before-and-after galleries because the pre-op photos are already heavily distorted by functional shift.
I remember one patient who came in with a severe open bite and a 12mm mandibular deficiency. The 3D surgical plan called for a 9mm advancement with some maxillary impaction to close the bite plane. What nobody told her ahead of time was that the anterior nasal floor drops when you impaction the maxilla, and her nose would look longer relative to the face even though you weren't touching the nose at all. She cried in the consultation room. We adjusted the plan to do 7mm instead of 9mm of advancement and left the maxilla more vertical, which changed her profile angle by roughly three degrees less but kept her nasal appearance acceptable. That kind of negotiation is what makes these cases actually work. The airway improvement is not optional. Sleep apnea resolution or significant reduction happens in maybe sixty to seventy percent of cases where the mandible was being advanced. The pharyngeal airway space increases by roughly eight to twelve cubic centimeters on average after a 10mm advancement. That number matters more than the aesthetic outcome for a lot of patients, even if they lead with looks in the consultation.
The Functional Recovery Is the Hard Part
Nerve sensation returns unevenly. The inferior alveolar nerve gets stretched or compressed during the BSSO, and numbness in the lower lip and chin is basically guaranteed for the first six to eight weeks. For about fifteen to twenty percent of patients it lingers beyond six months, though it usually improves. The maxillary nerves from a Le Fort I are less predictable. Some people get zygomatic cheek numbness that never fully resolves. Not dangerous, just a permanent thing you live with. Diet is strictly liquid for the first two weeks, then mashed foods for another two, then soft for about six weeks total before regular chewing returns. I have seen patients who tried to chew steak at week four and ended up with plate loosening on the maxillary side. The screws hold, but the osteotomy site hasn't consolidated enough to take occlusal loads. You cannot rush this. The bone takes eight to ten weeks to have enough bridging callus to handle normal mastication forces, and full remodeling continues for a year plus. Packing the nose with ribbon gauze or absorbable material is standard after a Le Fort I because the sinus mucosa is disrupted. Breathing through the nose feels impossible for about ten days. Mouth breathing dries out the oral mucosa and makes the splint or elastics uncomfortable. Patients who had a tracheostomy for severe obstructive sleep apnea beforehand usually don't need it anymore after the mandibular advancement, but the transition period is rough.
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Before and After Photos Are Misleading By Design
The standard "before" photo is taken with the teeth in maximum intercuspation, which for severe malocclusion cases means the teeth are artificially holding the jaws together in a position that is not anatomically correct. The "after" photo is taken with the new occlusion, which often looks like a completely different person because the dental compensations that were hiding the skeletal problem are gone. That's why the transformation looks so extreme in the gallery images. The actual soft tissue response is dose-dependent but nonlinear. Mandibular advancement of 5mm moves the pogonion point roughly 3.5mm anteriorly. Ten millimeters of advancement moves it maybe six to seven millimeters. Diminishing returns set in past about 12mm because the soft tissue envelope stretches and adapts. The skin doesn't expand infinitely, so extremely large movements risk relative soft tissue redundancy, especially in the neck and submental area. That's why revision neck lifts or submental lipectomy occasionally shows up in the later stages of these cases. Nasal changes after Le Fort I impaction are worth tracking separately. When you move the maxilla up, the septum has to be released or it will tether the movement. If it's released properly, the nasal tip can rotate slightly upward, making the nose appear shorter. But if the surgeon leaves the septum partially attached, you get a blocked movement or a deviated septum post-op. Both scenarios happen more often than the textbooks say.
What Actually Goes Wrong
Relapse is real but usually small. Less than 2mm of mandibular setback relapse is considered normal. Anything beyond that suggests either inadequate fixation, premature loading, or unfavorable condylar remodeling. Condylar resorption is a separate complication that tends to happen in younger female patients with high gonial angles and anterior face height excess. It can cause the mandible to rotate upward and backward after surgery, undoing years of orthodontic work. The rate is low, maybe two to five percent depending on the population, but it is devastating when it occurs. Infection rates after orthognathic surgery are low but not zero. The oral cavity is not sterile, and the hardware sits right next to extraction sockets and periodontal spaces. Deep space infections requiring I&D happen in about one to three percent of cases. Most are manageable with IV antibiotics and observation. The ones that become problems involve the pterygoid musculature or the submandibular space, and they require drainage within forty-eight hours or they organize into chronic collections. Temporomandibular joint symptoms flare up in roughly ten to fifteen percent of patients during the early healing phase. Most resolve within three months. A small subset develops persistent TMD that required splint therapy or, very rarely, intra-articular intervention. The pre-existing TMD status is a significant predictor, which is why a thorough joint assessment with MRI is non-negotiable before booking the surgery date.
When Orthognathic Surgery Is Not the Right Move
Adult patients with severe skeletal discrepancies who also have active periodontal disease should not proceed until the periodontium is stabilized. The osteotomy cuts go through bone that needs healthy support. Active class III or class II camouflage orthodontics without surgery is an option for mild to moderate cases, but once the dental compensation threshold is exceeded, camouflage creates aesthetic and functional problems of its own. That threshold is roughly 4 to 5mm of dental deviation from the skeletal base. Patients with uncontrolled bruxism or clenching disorders face higher hardware failure rates. The occlusal loads can loosen plates within the first few months. I have seen multiple plate failures in patients who refused to wear a night guard post-operatively. It is not a suggestion, it is a structural requirement for at least the first six months of healing. Surgical timing matters more than most patients realize. The ideal window for maxillary procedures is after peak growth velocity has ended, which for girls is around sixteen to seventeen and for boys is around eighteen to twenty. Operating before growth completion guarantees relapse because the mandible will continue to grow downward and forward, dragging the occlusion with it. Revision surgery after growth completion is far more complex than primary surgery because of scar tissue, altered anatomy, and reduced surgical fields.
The financial and time cost is substantial. In the United States, the surgical component alone runs roughly fifteen to thirty-five thousand dollars depending on whether it is one or two jaw procedures, plus anesthesia and facility fees. Orthodontics before and after adds another eight to fifteen thousand. Time off work or school is typically two to three weeks for the initial recovery phase, with full social readiness taking about six to eight weeks when the swelling subsides enough that the face looks like its final position. The final result, bone and soft tissue settled, is somewhere around twelve to eighteen months out. The most effective outcome comes from a coordinated team: an oral and maxillofacial surgeon, an orthodontist, and sometimes a prosthodontist if there are restorative needs. Individual practitioners who do not regularly work with orthodontists on surgical cases tend to have higher complication and satisfaction-gap rates. The feedback loop between pre-surgical planning and post-surgical settling is where the actual quality differentiation happens, and it requires communication that most solo practices cannot sustain.
