A Le Fort I fracture is a horizontal (transverse) fracture of the maxilla that separates the tooth-bearing segment of the maxilla from the upper midface. The fracture line runs through the anterolateral margin of the nasal fossa, across the lateral wall of the maxillary sinus, and through the pterygoid plates posteriorly. [1-2] It is the lowest of the three Le Fort fracture patterns, originally described by René Le Fort in 1901. [3] Notably, classic isolated Le Fort patterns are seen in only ~9% of cases; most present as incomplete, unilateral, or combination patterns. [4]
1. History
- Mechanism: high-energy blunt trauma to the midface — motor vehicle collisions are the most common etiology (78%), followed by assaults and falls [5-7]
- Direct blow to the lower midface or upper lip region
- Key HPI: timing of injury, direction and force of impact, loss of consciousness, dental history (baseline occlusion, dentures)
- Symptom characterization: facial pain, difficulty biting/chewing, sensation that "teeth don't fit together" (malocclusion), epistaxis, facial swelling
- Associated symptoms: numbness of upper lip/teeth (infraorbital nerve), difficulty opening mouth, blood in mouth
- Alcohol/drug intoxication is common — blood alcohol detected in ~28% of Le Fort fracture patients [3]
2. Alarm Features
- Airway compromise: 26.5% of Le Fort fracture patients present with airway obstruction or decreased respiration requiring emergent intubation or tracheostomy [8]
- Posterior displacement of the maxilla causing oropharyngeal obstruction
- Uncontrolled oronasal hemorrhage
- Concomitant mandible fracture (creates "flail" jaw, worsening airway risk)
- Loss of consciousness (83.9% of those requiring emergent airway had LOC) [8]
- Signs of concomitant higher-level Le Fort (II/III): periorbital ecchymosis ("raccoon eyes"), CSF rhinorrhea, telecanthus
- Associated injuries in Le Fort fractures: skull fractures (28%), intracranial hemorrhage (13%), cervical spine injury (9.8%) [5]
3. Medications
- Acute pain management: IV opioids (morphine, fentanyl) for acute pain; avoid NSAIDs initially if active hemorrhage or surgical intervention anticipated
- Antibiotics: perioperative antibiotics for open fractures or those requiring ORIF (commonly ampicillin-sulbactam or clindamycin for oral flora coverage)
- Tetanus prophylaxis: update if indicated
- Antiemetics: ondansetron — vomiting is dangerous with maxillomandibular fixation (MMF) and in patients with impaired airway
- Avoid: nasogastric tubes through the nose if skull base fracture is suspected (use orogastric route)
- Postoperative: chlorhexidine oral rinse, soft diet compliance, possible short-course steroids for edema
4. Diet
- Acute phase: NPO if surgical intervention anticipated
- Postoperative/MMF: strict liquid diet progressing to soft/pureed diet over 4–6 weeks
- Nutritional supplementation (protein shakes, liquid vitamins) to prevent malnutrition during MMF
- Avoid hard, crunchy, or chewy foods for 6–8 weeks post-repair
- Adequate hydration — patients with MMF are at risk for dehydration
5. Review of Systems
- HEENT: epistaxis, nasal obstruction, visual changes (diplopia, decreased acuity), hearing changes, CSF rhinorrhea, dental pain, loose teeth
- Neuro: headache, LOC, confusion, numbness (infraorbital nerve distribution — upper lip, lateral nose, lower eyelid)
- MSK: neck pain, jaw pain, difficulty opening mouth
- Respiratory: dyspnea, stridor, difficulty managing secretions
- GI: difficulty swallowing, nausea/vomiting
6. Collateral History and Family History
- Witnesses to mechanism (speed of MVC, height of fall, weapon used in assault)
- Pre-injury dental occlusion and dental prosthetics (critical for surgical planning)
- Baseline mental status (for GCS comparison)
- Anticoagulant/antiplatelet use
- Family history is generally not contributory, though osteoporosis or osteogenesis imperfecta may lower fracture threshold
7. Risk Factors
- Motor vehicle collisions — most common mechanism [6-7]
- Assault/interpersonal violence
- Sports injuries (contact sports)
- Falls (especially elderly, intoxicated patients)
- Male sex (75% of maxillary fracture patients) [9]
- Young adults (peak incidence age 21–30 years) [7]
- Alcohol/substance intoxication
- Non-use of seatbelts — seatbelt laws have been associated with decreased Le Fort fracture frequency [10]
8. Differential Diagnosis
- Le Fort II fracture (pyramidal) — extends through inferior orbital rim; periorbital ecchymosis, infraorbital hypoesthesia, mobility of nose with maxilla
- Le Fort III fracture (craniofacial disjunction) — entire face mobile relative to cranium; bilateral periorbital ecchymosis, CSF leak
- Zygomaticomaxillary complex (ZMC) fracture — malar flattening, trismus, infraorbital nerve paresthesia; no maxillary mobility
- Isolated maxillary sinus fracture — no mobility, no malocclusion
- Dentoalveolar fracture — localized segment of teeth/alveolar bone mobile, not entire maxilla
- Palatal fracture — sagittal split of palate, may coexist with Le Fort I
- Mandible fracture — malocclusion present but maxilla is stable; pain/step-off at mandible
Key distinguishing feature of Le Fort I: mobility of the entire maxillary dental arch (Guérin's sign) with the upper face and nose remaining stable. [1-2]
9. Past Medical History
- Prior facial fractures or facial surgery
- Pre-existing malocclusion or orthodontic treatment
- Dental prosthetics (dentures, implants, bridges)
- Bleeding disorders or anticoagulant use
- Osteoporosis, osteopenia, or metabolic bone disease
- History of substance abuse (recurrent trauma risk)
10. Physical Exam
- Vital signs: assess for hemodynamic instability (hemorrhage), tachypnea/stridor (airway compromise)
- Inspection: midface edema, ecchymosis of upper lip/buccal sulcus, facial elongation ("dish face" deformity), epistaxis
- Palpation: step-off at piriform rim and zygomaticomaxillary buttress; tenderness along lateral maxillary wall
- Guérin's sign (pathognomonic): grasp the anterior maxillary alveolus and attempt to mobilize — the entire maxillary dental arch moves independently while the nasal bridge and upper face remain stable
- Intraoral exam: ecchymosis of the buccal sulcus, palatal ecchymosis/laceration, malocclusion (open bite, crossbite, premature posterior contact), loose or avulsed teeth [11]
- Occlusion check: have patient bite down — assess for premature posterior contact and anterior open bite
- Cranial nerve exam: infraorbital nerve (V2) sensation — upper lip, lateral nose, lower eyelid
- Nasal exam: septal hematoma (requires urgent drainage), epistaxis source
- High specificity findings for midface fractures: raccoon eyes, malar flattening, palpable step-off, external nasal deformity [12]
11. Lab Studies
- Type and screen/crossmatch: if significant hemorrhage or surgical intervention planned
- CBC: baseline hemoglobin
- BMP: pre-operative baseline
- Coagulation studies (PT/INR, PTT): especially if on anticoagulants or significant bleeding
- Blood alcohol level and urine drug screen: common in trauma workup; alcohol detected in ~28% of patients [3]
- Blood gas: if airway compromise suspected
12. Imaging
- First-line: CT face with thin-cut axial and coronal reformats — gold standard for diagnosis and surgical planning [1][7][13]
- Key CT findings:
- Fracture through the anterolateral margin of the nasal fossa (unique to Le Fort I) [2]
- Fracture of the lateral maxillary sinus wall
- Pterygoid plate fracture — hallmark of all Le Fort fractures (though ~37% of pterygoid plate fractures are non-Le Fort) [1][14]
- Bilateral maxillary sinus opacification (hemosinus) — consistently present [11]
- Fracture through posterior and medial maxillary walls [11]
- 3D CT reconstruction: helpful for surgical planning but 2D images are more sensitive for fracture detection [7]
- Plain radiographs: largely supplanted by CT; Waters view may show sinus opacification but insufficient for surgical planning
- CT head and C-spine: should be obtained concurrently given high rates of associated TBI (13% intracranial hemorrhage) and cervical spine injury (9.8%) [5]
13. Special Tests
- Guérin's test: bimanual maxillary mobility assessment — grasp anterior alveolus with one hand, stabilize nasal bridge/glabella with the other; movement of maxilla alone = Le Fort I
- Occlusal assessment: have patient bite on tongue depressor; compare to baseline occlusion
- Tongue blade bite test: limited utility for maxillary fractures but useful to rule out concurrent mandible fracture
- Note: ~9% of Le Fort fractures present without maxillary mobility (greenstick/incomplete fractures) — malocclusion and bilateral sinus fluid on CT are clues [11]
14. ECG
- Not routinely indicated for isolated Le Fort I fracture
- Obtain if polytrauma, hemodynamic instability, significant hemorrhage, or pre-operative assessment warrants cardiac evaluation
- Consider in elderly patients or those with cardiac comorbidities prior to operative repair
15. Assessment
The Le Fort I fracture is the least severe of the Le Fort patterns but still represents significant midface trauma requiring high-energy mechanism. It is characterized by a floating maxillary dental segment with malocclusion. Among Le Fort I patients, 13.6% required tracheostomy and none had mortality in one series. [3] However, associated injuries are common — skull fractures (28%), intracranial hemorrhage (13%), and cervical spine injury (9.8%) must be actively excluded. [5] Classic isolated Le Fort patterns are uncommon; most patients present with combination or atypical fracture lines. [4]
Severity stratification:
- Mild: non-displaced or minimally displaced, stable occlusion → may be managed conservatively
- Moderate: displaced with malocclusion but stable airway → ORIF within 5–7 days
- Severe: significant displacement, airway compromise, uncontrolled hemorrhage, or polytrauma → emergent stabilization
16. Treatment Plan
Initial stabilization (ED)
- Airway: priority #1 — orotracheal intubation preferred; avoid nasotracheal intubation if skull base fracture suspected; surgical airway if needed (13.6% of Le Fort I patients required tracheostomy) [3][8]
- Hemorrhage control: anterior/posterior nasal packing, direct pressure, Foley catheter balloon tamponade for posterior epistaxis; rarely angioembolization
- Reduce posterior maxillary displacement: manual disimpaction by pulling the maxilla forward (Rowe disimpaction forceps) can relieve airway obstruction acutely
- C-spine immobilization until cleared
Definitive treatment
- 83% of Le Fort fractures undergo ORIF with maxillomandibular fixation (MMF) [9]
- Surgical approach: intraoral (upper buccal sulcus) incision for exposure of the zygomaticomaxillary and nasomaxillary buttresses [15-16]
- Open reduction and internal fixation (ORIF) with titanium miniplates at the piriform rim and zygomaticomaxillary buttress — restores vertical buttress height and occlusion [15-16]
- Timing: typically within 5–7 days to allow edema to subside; 100% of Le Fort fractures in one series were repaired within 1 week [9]
- Non-displaced fractures with stable occlusion may be managed with observation and elastic traction alone [11]
- Overall postoperative complication rate: 2.49% (wound dehiscence, transfusion, reoperation) [17]
17. Disposition
- Admission criteria: virtually all Le Fort fractures warrant admission — 52% require ICU, 27% trauma ward, 21% go directly to OR [3]
- Airway compromise or need for monitoring
- Significant hemorrhage
- Associated injuries (TBI, C-spine injury)
- Polytrauma
- Observation: minimally displaced Le Fort I with stable occlusion and no associated injuries may be observed briefly, but admission is standard
- Specialist consultation: oral and maxillofacial surgery (OMFS) or plastic surgery/facial trauma — consult early [9][18]
- Neurosurgery if intracranial hemorrhage
- Ophthalmology if orbital involvement suspected
- Transfer: to a Level I trauma center with OMFS/craniofacial surgery capability if not available
18. Follow Up / Return Precautions
- Follow-up timing: 1 week post-discharge for wound check and occlusion assessment; then 2, 4, 6 weeks; long-term at 3 and 6 months
- Hardware removal: if symptomatic (not routine)
- Return precautions (counsel patient):
- Worsening facial swelling, new numbness, or visual changes
- Difficulty breathing, increased bleeding from nose or mouth
- Fever (infection risk)
- Change in bite/occlusion after initial repair
- If MMF wires in place: carry wire cutters at all times; cut wires immediately if vomiting or airway distress
- Expected recovery: soft diet for 6–8 weeks; full bony healing ~6–8 weeks; infraorbital nerve paresthesia may take months to resolve [19]
- Complications to monitor: malocclusion, nonunion/malunion, infraorbital nerve hypoesthesia (10–16%), hardware infection, oroantral fistula, devitalized teeth [19]
References
1. Diagnosis of Midface Fractures With CT: What the Surgeon Needs to Know. — Hopper RA, Salemy S, Sze RW. Radiographics : A Review Publication of the Radiological Society of North America, Inc. 2006.
2. How to Simplify the CT Diagnosis of Le Fort Fractures. — Rhea JT, Novelline RA. AJR. American Journal of Roentgenology. 2005.
3. Comparison of the Severity of Bilateral Le Fort Injuries in Isolated Midface Trauma. — Bagheri SC, Holmgren E, Kademani D, et al. Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons. 2005.
4. Are Le Fort Fracture Lines Relevant in Modern Trauma?. — Khandelwal G, Bhutia O, Kumar A, Gamangatti S, Sagar S. European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society. 2026.
5. The Characteristics and Cost of Le Fort Fractures: A Review of 519 Cases From a Nationwide Sample. — Lee KC, Chuang SK, Eisig SB. Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons. 2019.
6. The Epidemiology and Management of Pediatric Maxillary Fractures. — Moffitt JK, Cepeda A, Wainwright DJ, et al. The Journal of Craniofacial Surgery. 2021.
7. Assessment of Changing Patterns of Le Fort Fracture Lines Using Computed Tomography Scan: An Observational Study. — Patil RS, Kale TP, Kotrashetti SM, et al. Acta Odontologica Scandinavica. 2014.
8. Airway Obstruction in LeFort Fractures. — Thompson JN, Gibson B, Kohut RI. The Laryngoscope. 1987.
9. An Update on Maxillary Fractures: A Heterogenous Group. — Cohn JE, Iezzi Z, Licata JJ, Othman S, Zwillenberg S. The Journal of Craniofacial Surgery. 2020.
10. Le Fort Fractures (I). A Study of Frequency, Etiology and Treatment. — Kahnberg KE, Göthberg KA. International Journal of Oral and Maxillofacial Surgery. 1987.
11. Le Fort Fractures Without Mobility. — Romano JJ, Manson PN, Mirvis SE, Dunham M, Crawley W. Plastic and Reconstructive Surgery. 1990.
12. Diagnostic Accuracy of Physical Examination Findings for Midfacial and Mandibular Fractures. — Rozema R, Doff MHJ, El Moumni M, et al. Injury. 2021.
13. ACR Appropriateness Criteria® Imaging of Facial Trauma Following Primary Survey. — Expert Panel on Neurological Imaging, Parsons MS, Policeni B, et al. Journal of the American College of Radiology : JACR. 2022.
14. Pterygoid Plate Fractures: Not Limited to Le Fort Fractures. — Garg RK, Alsheik NH, Afifi AM, Gentry LR. The Journal of Craniofacial Surgery. 2015.
15. Midface Fractures: Advantages of Immediate Extended Open Reduction and Bone Grafting. — Manson PN, Crawley WA, Yaremchuk MJ, et al. Plastic and Reconstructive Surgery. 1985.
16. Complex Maxillary Fractures: Role of Buttress Reconstruction and Immediate Bone Grafts. — Gruss JS, Mackinnon SE. Plastic and Reconstructive Surgery. 1986.
17. Risk Factors for Acute Postoperative Complications Following Operative Management of Le Fort Fractures-a NSQIP Study. — Wood Matabele KL, Seitz AJ, Doan TC, Poore SO. The Journal of Craniofacial Surgery. 2023.
18. Evaluation and Management of Facial Fractures. — Carithers JS, Koch BB. American Family Physician. 1997.
19. Complications Related to Midfacial Fractures: Operative Versus Non-Surgical Treatment. — Kloss FR, Stigler RG, Brandstätter A, et al. International Journal of Oral and Maxillofacial Surgery. 2011.