Maxillofacial Surgery — How It Works, Benefits & Recovery — Procedure Guide, Recovery & Risks | MyMedicPlus

Oral and maxillofacial surgery (OMFS) is a surgical specialty that diagnoses and treats diseases, injuries, and developmental defects involving the mouth, jaws, face, neck, and skull base. The specialty uniquely bridges dentistry and medicine, requiring dual qualification in dentistry and medicine in many countries. The scope of maxillofacial surgery is broad, encompassing orthognathic (corrective jaw) surgery for skeletal malocclusion and facial imbalance; facial trauma reconstruction involving fractures of the zygoma, mandible, orbital walls, and midface; resection and reconstruction of oral, jaw, and facial tumours including squamous cell carcinoma, salivary gland tumours, and odontogenic jaw cysts and tumours; cleft lip and palate repair (often performed in infancy); temporomandibular joint (TMJ) surgery for internal derangement and ankylosis; obstructive sleep apnoea surgery (maxillomandibular advancement); dental implant surgery and pre-implant bone grafting; and management of severe dentoalveolar infections (Ludwig's angina) threatening the airway. Procedures range from simple outpatient extractions under local anaesthesia to extensive multi-day free flap reconstructions of composite jaw defects following cancer ablation. OMFS is practiced in specialist hospital units and craniofacial centres worldwide, with subspecialisation in oncology and reconstruction, craniofacial surgery, and implantology becoming increasingly common.

Patient referrals to oral and maxillofacial surgery span multiple disciplines. Jaw misalignment (skeletal malocclusion) requiring orthognathic surgery is identified by orthodontists in growing patients where dental braces alone cannot correct the skeletal discrepancy — the surgery is performed after facial growth is complete, typically at age 17–21. Facial trauma is the most common emergency OMFS indication: motor vehicle accidents, assaults, and sports injuries causing mandibular or midface fractures requiring open reduction and internal fixation with titanium plates and screws. Oral cavity cancers (tongue, floor of mouth, buccal mucosa) require resection with adequate oncological margins — reconstruction of jaw continuity and soft tissue defects uses free vascularised flaps (fibula free flap for jaw reconstruction, radial forearm free flap for tongue and floor of mouth). Salivary gland tumours (parotid, submandibular) require surgical excision with preservation of the facial nerve. Obstructive sleep apnoea severe enough to fail CPAP therapy is increasingly managed by maxillomandibular advancement (MMA), which enlarges the upper airway by advancing both jaws forward simultaneously — achieving surgical cure rates of 85–90% for OSA. Temporomandibular joint disease causing pain, limited mouth opening, or joint destruction may require arthroscopy, discoplasty, or total TMJ replacement with custom prostheses. Developmental jaw cysts (dentigerous cysts, ameloblastoma) are managed by enucleation or resection depending on size and histology.

The surgical approach in maxillofacial surgery is determined by the specific procedure and the need to minimise visible external scarring. For orthognathic surgery: the patient is intubated via the nose (nasotracheal intubation) to allow the mouth to be closed during surgery for occlusal reference. Intraoral incisions are made in the gingival sulcus above the upper teeth and below the lower teeth, exposing the maxilla and mandible through subperiosteal tunnels. The Le Fort I osteotomy mobilises the entire upper jaw by transecting bone at the level of the nasal floor, allowing repositioning in all spatial planes. Bilateral sagittal split osteotomy (BSSO) advances or sets back the mandible by splitting the vertical ramus at precisely determined points guided by anatomical landmarks, preserving the inferior alveolar nerve (IAN). Titanium plates and screws provide rigid internal fixation, eliminating the traditional jaw wiring. For facial trauma: open reduction via incisions within the hairline, lower eyelid, or intraoral approaches expose fracture sites for reduction and plate fixation. For oral cancer: resection is performed with minimum 1 cm clear margins; a simultaneous or staged neck dissection removes cervical lymph nodes; jaw reconstruction uses the fibula free flap (harvested from the lower leg with its vascular pedicle) and microsurgically anastomosed to recipient vessels in the neck, providing vascularised bone for jaw reconstitution and dental implant rehabilitation. Post-operative nasogastric tube or liquid nutrition ensures adequate caloric intake during early recovery when oral function is compromised.

Maxillofacial surgery provides functional, oncological, and aesthetic benefits that profoundly affect quality of life. Orthognathic surgery corrects malocclusion with stable results in over 90% of patients, eliminating difficulty chewing, jaw pain, abnormal speech, and facial asymmetry. Patient satisfaction with orthognathic surgery is consistently high — 85–95% satisfaction rates in published series — with documented improvements in self-esteem, social functioning, and quality of life scores (OHIP-14). Maxillomandibular advancement for OSA achieves surgical cure (AHI <5/hour) in approximately 85% of appropriately selected patients, eliminating dependence on CPAP and its associated compliance difficulties. For oral cavity cancers, maxillofacial oncological surgery combined with free flap reconstruction achieves acceptable function and appearance — the fibula free flap has transformed jaw reconstruction, enabling dental implant-supported prosthetics and restoring near-normal speech and mastication. Five-year disease-specific survival for early oral cancer (T1–T2) resected with clear margins is 70–85%. Cleft lip and palate surgery in infancy normalises facial appearance, allows normal feeding, and provides the foundation for normal speech development — long-term satisfaction in appropriately managed patients is high. For facial trauma, rigid internal fixation of fractures with titanium plates achieves excellent anatomical restoration with good functional outcomes for most fracture types.

Risks in maxillofacial surgery vary substantially by procedure and complexity. Orthognathic surgery carries specific risks: inferior alveolar nerve (IAN) paraesthesia — reduced or altered sensation in the lower lip and chin — is the most significant complication, occurring temporarily (weeks to months) in 50–70% of BSSO patients and persisting permanently in 5–10%. Condylar resorption (progressive resorption of the mandibular condyle post-surgery) affects approximately 5% of patients, more commonly women with pre-existing condylar changes, and can cause bite relapse requiring re-treatment. Skeletal relapse (movement of the jaws back toward their pre-surgical position) occurs in 5–15% of cases and is minimised by adequate pre-surgical orthodontics, rigid fixation, and compliance with post-surgical elastic guidance. Airway compromise from swelling in the immediate post-operative period is managed by nasopharyngeal airways, head elevation, and, rarely, temporary tracheostomy. Infection and hardware failure (loosening or fracture of plates) are uncommon (under 5%) and usually managed without significant sequelae. For cancer resection, the principal risks include free flap failure (vascular compromise of the reconstructive flap) occurring in 3–5% of microsurgical cases; wound infection particularly in the oral cavity, where saliva contamination is unavoidable; and radiotherapy-related complications (osteoradionecrosis of the jaw) in patients requiring post-operative radiation.

Recovery from maxillofacial surgery is procedure-specific. After orthognathic surgery: significant facial swelling peaks on days 3–5 and gradually resolves over 4–8 weeks. A liquid and soft diet is maintained for 6–8 weeks. Elastic guiding bands across the teeth (worn part-time) direct the bite during early healing but jaw wiring is rarely used with modern rigid internal fixation. Oral hygiene is challenging initially; chlorhexidine mouthwash and gentle brushing around intraoral wounds prevent infection. Post-surgical orthodontics begin 6–8 weeks post-operatively and continue for 6–12 months to finalise the bite. Full bony healing occurs by 3–6 months; nerve recovery (IAN paraesthesia) continues for up to 18 months. Light desk work resumes at 2–3 weeks; physical activities at 6 weeks. After facial trauma surgery: recovery depends on fracture complexity; most patients resume normal activities in 3–6 weeks. Mandibular fracture patients maintain a soft diet for 6 weeks. After cancer resection and free flap reconstruction: hospital stay is 7–14 days; the patient must remain still to protect the microvascular anastomosis during the first 3–5 days; rehabilitation — speech therapy, physiotherapy, and dietary support — begins during the in-patient stay. Return to normal function takes 3–6 months; adjuvant radiotherapy (begun at 6 weeks post-operatively) extends recovery significantly. Long-term dental rehabilitation with implants (delayed to at least 6 months after radiotherapy) completes functional restoration.