A Le Fort II fracture is a pyramidal midface fracture extending from the pterygoid plates through the inferior orbital rim, across the nasofrontal suture, separating the central midface from the cranial base. It is a high-energy injury with significant associated morbidity and mortality, requiring emergent evaluation and multidisciplinary management.
The following figure illustrates the classic Le Fort fracture classification, with the Le Fort II pattern (teal line) forming the characteristic pyramidal shape through the infraorbital rim and nasofrontal junction:
1. History
- Mechanism: high-energy blunt trauma — motor vehicle collisions are the most common etiology (78% of midface fractures), followed by assaults, falls, and work-related injuries [2-3]
- Key HPI: direction and velocity of impact to the midface, loss of consciousness, visual changes (diplopia, decreased acuity), nasal discharge (clear fluid suggesting CSF leak), epistaxis, malocclusion, difficulty breathing
- Timing: onset of swelling, visual symptoms, numbness in the infraorbital nerve (V2) distribution
- Associated symptoms: facial pain, inability to bite down properly, sensation of "face moving," anosmia
- Important negatives: neck pain, extremity injuries, chest pain (polytrauma screening)
2. Alarm Features
- CSF rhinorrhea — Le Fort II/III and panfacial fractures carry an 8.9% CSF leak rate compared to 1.2% for other facial fractures [4]
- Airway compromise — 26.5% of Le Fort fracture patients present with airway obstruction requiring emergent intubation or tracheostomy [5]
- Intracranial hemorrhage — Le Fort II fractures confer a 2.88-fold increased risk of intracranial injury, even in neurologically intact patients [6]
- Mortality — Le Fort II independently confers a 94% increased risk of death (RR 1.94) compared to simple midface fractures [6]
- Rapidly expanding periorbital hematoma (retrobulbar hemorrhage)
- Decreasing visual acuity or afferent pupillary defect (orbital apex syndrome)
- GCS deterioration
3. Medications
- Antibiotic prophylaxis:
- Non-operative closed fractures: prophylactic antibiotics are not recommended per AAST consensus [7]
- Operative fractures undergoing ORIF: perioperative antibiotics indicated; a single preoperative dose is sufficient, with no benefit to extending beyond 24 hours postoperatively [7-9]
- CSF leak with basilar skull fracture: prophylactic antibiotics are not recommended per IDSA guidelines; pneumococcal vaccination is recommended instead [10]
- Pain management: multimodal analgesia (acetaminophen, NSAIDs if no contraindication, opioids for severe pain); avoid NSAIDs if active hemorrhage or planned surgery
- Tetanus prophylaxis if open wound and immunization not current
- Antiemetics to prevent vomiting-related increases in intracranial pressure if CSF leak suspected
- Avoid nasogastric tubes — risk of intracranial passage through cribriform plate disruption
4. Diet
- NPO initially if surgical intervention anticipated
- Soft or liquid diet postoperatively if intermaxillary fixation (IMF) is placed
- Long-term: soft mechanical diet for 6–8 weeks post-fixation to avoid stress on healing fracture sites
- Adequate protein and calcium intake to support bone healing
- Wire cutters at bedside if IMF in place (for airway emergencies/vomiting)
5. Review of Systems
- Neuro: headache, altered consciousness, amnesia, anosmia, clear nasal drainage (CSF)
- Eyes: diplopia, decreased visual acuity, periorbital swelling, epiphora
- ENT: epistaxis, nasal obstruction, malocclusion, trismus, hearing changes
- MSK: cervical spine pain, extremity pain/deformity
- Pulmonary: dyspnea, difficulty breathing through nose or mouth
- GI: difficulty swallowing, nausea/vomiting
6. Collateral History and Family History
- Witnesses to mechanism (speed of MVC, height of fall, weapon used)
- Pre-injury dental occlusion status (prior orthodontics, dentures, baseline malocclusion)
- Anticoagulant or antiplatelet use
- Alcohol/substance use at time of injury — blood alcohol detected in ~28% of Le Fort patients [11]
- Family history is generally not contributory unless bleeding disorders are suspected
7. Risk Factors
- Male sex (male-to-female ratio approximately 5:1) [12]
- Age 18–30 years (peak incidence) [2]
- Motor vehicle collisions (strongest association with Le Fort fractures) [3]
- Alcohol/substance intoxication
- Occupational hazards (construction, industrial work)
- Contact sports, interpersonal violence
- Non-seatbelt use, non-helmet use
8. Differential Diagnosis
- Le Fort I fracture — horizontal fracture through the maxilla below the nose; no orbital rim involvement
- Le Fort III fracture — craniofacial disjunction involving the zygomatic arch (distinguished from Le Fort II by zygomatic arch fracture) [13]
- Zygomaticomaxillary complex (ZMC) fracture — often unilateral, involves the zygomatic body and arch; 32% of Le Fort II ORIFs have concomitant malar fractures [14]
- Naso-orbito-ethmoid (NOE) fracture — involves medial canthal tendon; may coexist with Le Fort II [15]
- Isolated orbital blowout fracture — orbital floor/wall involvement without the pyramidal pattern
- Nasal bone fracture — isolated, without infraorbital rim or pterygoid involvement
- Panfacial fracture — combination of upper, mid, and lower face fractures
Key distinguishing feature of Le Fort II: fracture of the inferior orbital rim is the unique component that differentiates it from Le Fort I and III [13]
9. Past Medical History
- Prior facial fractures or facial surgery
- Pre-existing dental/occlusal abnormalities
- Bleeding disorders or anticoagulant use
- Osteoporosis or metabolic bone disease
- Prior sinus surgery or nasal surgery
- Immunosuppression (increases infection risk; steroid use is an independent predictor of postoperative complications, OR 13.73) [16]
10. Physical Exam
- Vital signs: assess for hemodynamic instability, tachycardia (hemorrhage), tachypnea (airway compromise)
- Inspection:
- Bilateral periorbital ecchymosis ("raccoon eyes") — high specificity for midface fractures [17]
- Facial elongation ("dish-face" deformity)
- Midface edema, epistaxis
- Clear rhinorrhea (CSF leak — halo sign on gauze)
- Palpation:
- Palpable step-off at the infraorbital rim — high positive predictive value [17]
- Mobility of the central midface (nose and maxilla move as a unit while the zygomas remain stable) — pathognomonic for Le Fort II
- Note: ~9% of Le Fort fractures present without maxillary mobility [18]
- Infraorbital nerve hypoesthesia (V2 distribution)
- Crepitus over the midface
- Intraoral exam:
- Malocclusion (open bite, crossbite, lack of dental intercuspation) [18]
- Ecchymosis of the maxillary buccal sulcus
- Palatal or alveolar fractures
- Eye exam:
- Visual acuity, pupillary reflexes (RAPD), extraocular movements
- Enophthalmos or exophthalmos, globe position change
- Subconjunctival hemorrhage
- Nasal exam: septal hematoma (requires urgent drainage), external deformity
11. Lab Studies
- Type and screen/crossmatch — significant hemorrhage possible
- CBC — baseline hemoglobin
- BMP — baseline renal function
- Coagulation studies (PT/INR, PTT) — especially if on anticoagulants or significant hemorrhage
- Blood alcohol level and urine drug screen — high prevalence of intoxication [11]
- Beta-2 transferrin — highly specific for CSF if clear nasal drainage is present [19]
- Glucose testing of nasal fluid — rapid bedside screen for CSF (less specific than beta-2 transferrin)
12. Imaging
- First-line: CT maxillofacial without IV contrast — the gold standard for diagnosis per ACR Appropriateness Criteria; thin-cut axial images with coronal and sagittal reformats [20-22]
- 3D reconstructions improve surgical planning confidence [22]
- Can often be reconstructed from head/C-spine CT source data [21]
- Key CT findings for Le Fort II:
- Fracture through the inferior orbital rim (unique identifier) [13]
- Fracture through the nasofrontal buttress
- Fracture through the anterior and posterolateral maxillary walls
- Pterygoid plate disruption — required for Le Fort classification [23]
- Bilateral maxillary sinus opacification (hemosinus) [18]
- CT head — mandatory to evaluate for intracranial hemorrhage given 2.88-fold increased risk [6]
- CT cervical spine — cervical spine injury present in ~10% of Le Fort patients [24]
- CT cisternography or MRI cisternography — if CSF leak suspected and beta-2 transferrin positive [25]
- Plain radiographs are insufficient and should not be used as the primary imaging modality [21]
- Note: only ~9% of Le Fort fractures follow the classic "ideal" pattern; most are incomplete, unilateral, or combined [26]
13. Special Tests
- Halo test — bedside test for CSF rhinorrhea (clear fluid on gauze forms a double ring)
- Beta-2 transferrin assay — confirmatory for CSF leak [19]
- Forced duction test — if extraocular muscle entrapment suspected
- Dental occlusion assessment — critical for surgical planning; compare to pre-injury occlusion
- Nasal endoscopy — to localize CSF leak site if present
14. ECG
- ECG is not specific to Le Fort II fractures but should be obtained as part of the trauma workup in polytrauma patients
- Indicated if hemodynamic instability, significant hemorrhage, or elderly patients
- Monitor for arrhythmias related to hemorrhagic shock or traumatic cardiac injury in high-energy mechanisms
15. Assessment
- Le Fort II is a high-energy pyramidal midface fracture with significant associated morbidity
- Associated injuries are common: skull fractures (28%), intracranial hemorrhage (13%), cervical spine injury (9.8%), concussion (9.1%) [24]
- Mortality is significantly higher than other midface fractures (cumulative 11.6% for complex midface fractures vs. 5.1% for simple) [6]
- Severity stratification: Le Fort II/III patients have significantly higher ISS scores than Le Fort I (p < .0001) and higher rates of ICU admission [11]
- Long-term complications include visual problems, anosmia, difficulty with mastication, breathing difficulties, and epiphora, with severity correlating with fracture complexity [27]
16. Treatment Plan
Initial stabilization (ED)
- Airway: Secure early. Orotracheal intubation is preferred initially. Avoid blind nasotracheal intubation if skull base fracture suspected (risk of intracranial passage). Nasotracheal intubation under direct visualization has been shown to have equivalent complication rates to tracheostomy even in Le Fort II/III. Surgical airway (cricothyrotomy/tracheostomy) if unable to intubate [5][28-29]
- Hemorrhage control: anterior/posterior nasal packing, direct pressure, Foley catheter tamponade for posterior epistaxis
- C-spine precautions until cleared
- Reduce posterior maxillary displacement manually if causing airway obstruction (pull midface forward)
Definitive management
- Open reduction and internal fixation (ORIF) — performed in ~73% of Le Fort fracture patients [24]
- Timing: typically within 7–14 days once edema subsides, unless emergent indications
- Surgical approach: intraoral (maxillary vestibular), subciliary/transconjunctival for orbital rim, extended transcaruncular for nasofrontal buttress [30]
- Fixation at key buttresses: nasofrontal, infraorbital rim, zygomaticomaxillary
- Restoration of dental occlusion is the primary surgical goal [31]
- Intermaxillary fixation (IMF) — used to establish occlusion intraoperatively; may be used alone for minimally displaced fractures
- CSF leak management: most traumatic CSF leaks resolve with conservative measures (bed rest, head elevation, sinus precautions, avoidance of straining); surgical repair if persistent >7 days [10][32]
17. Disposition
- Admission criteria: Essentially all Le Fort II fractures require inpatient admission — over 52% of Le Fort patients are admitted to the ICU, and 21% go directly to the OR [11]
- ICU admission for: GCS ≤ 8, intracranial hemorrhage, hemodynamic instability, airway compromise, active CSF leak
- Trauma ward for: stable patients with isolated Le Fort II without intracranial injury
- Discharge criteria: stable airway, no active hemorrhage, no CSF leak, pain controlled, able to tolerate diet, reliable follow-up arranged
- Specialist consultation triggers:
- Oral/maxillofacial surgery or plastic surgery — all Le Fort II fractures
- Neurosurgery — intracranial hemorrhage, CSF leak, skull base fracture
- Ophthalmology — visual acuity changes, globe injury, orbital apex syndrome, entrapment
- Otolaryngology — CSF leak localization, nasal/sinus involvement
- Trauma surgery — polytrauma management
18. Follow Up / Return Precautions
- Follow-up timing: 1–2 weeks postoperatively with the surgical team, then at 4, 6, and 12 weeks for occlusion assessment and hardware evaluation [9]
- Sinus precautions: no nose blowing, sneeze with mouth open, no straw use for 6 weeks
- Return immediately for:
- New or worsening clear nasal drainage (CSF leak)
- Fever, increasing facial swelling/erythema (infection)
- Visual changes (diplopia, decreased acuity — may indicate retrobulbar hemorrhage or late enophthalmos)
- Difficulty breathing or swallowing
- Change in bite/occlusion
- Signs of neurological deterioration (confusion, worsening headache, seizures)
- Expected recovery: facial swelling peaks at 48–72 hours and gradually resolves over 2–4 weeks; infraorbital nerve paresthesia may take months to recover; full bone healing 6–8 weeks; long-term functional deficits (anosmia, epiphora, masticatory difficulty) are more common with comminuted fractures [27]
- Patient counseling: avoid contact sports for 3 months, wear seatbelts, protective equipment
References
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