Maxillofacial Trauma & Dental Emergencies
Comprehensive emergency management of severe facial skeleton trauma and dental emergencies. Details the Le Fort classification (I, II, III), orbital blowout fractures with inferior rectus entrapment and the oculocardiac reflex, mandibular fracture tongue blade testing, Ellis classification of dental trauma, and tooth replantation timing.
Resuscitation Quick Ribbon (First 2 Minutes)
Bottom-Line Clinical Pearl
In dental avulsion of a permanent tooth, time to replantation is paramount: every 5 minutes outside the socket reduces periodontal ligament cell survival by 10%. Replant immediately at the bedside within 60 minutes, handling the tooth strictly by the crown and never scrubbing the root.
All Le Fort fractures involve disruption of the pterygoid plates. Test by grasping the anterior maxilla with gloved thumb and index finger while stabilizing the forehead with the other hand:
| Classification | Anatomic Fracture Line | Physical Exam Mobility Finding | Airway & Vascular Complications |
|---|---|---|---|
| Le Fort I (Floating Palate) | Horizontal fracture across maxilla above alveolar ridge, through lower nasal septum and pterygoid plates | Mobility of the hard palate and upper teeth ONLY (nasofrontal region remains stable) | Low airway risk; epistaxis, dental malocclusion. |
| Le Fort II (Pyramidal Fracture) | Pyramidal fracture extending through nasal bones, lacrimal bones, orbital floor, infraorbital rim, and posterolateral maxillary sinus | Mobility of the maxilla AND the nose together (forehead remains stable) | Moderate airway risk; CSF rhinorrhea, bilateral subconjunctival hemorrhage. |
| Le Fort III (Craniofacial Disjunction) | Complete craniofacial separation: Fracture through zygomatic arches, orbital walls, ethmoid, sphenoid, and nasofrontal suture | Mobility of the ENTIRE FACE ('dish-face' deformity) relative to the cranium | CRITICAL AIRWAY EMERGENCY: Massive hemorrhage from maxillary artery branches; nasopharyngeal airway obstruction; CSF leak; NEVER place nasogastric/nasotracheal tubes. |
| Feature | Orbital Floor Fracture Details | Diagnostic & Emergency Action |
|---|---|---|
| Pathophysiology | Blunt object larger than orbital rim (fist, baseball) increases intraorbital hydraulic pressure, fracturing thin orbital floor (maxillary bone) or medial wall (lamina papyracea) | CT Orbit with fine coronal cuts. |
| Clinical Signs | Enophthalmos (sunken eye), diplopia, orbital emphysema (crepitus on palpation), numbness of ipsilateral cheek and upper lip (infraorbital nerve injury, V2) | Avoid nose blowing (forces air from maxillary sinus into orbit, causing orbital compartment syndrome). |
| Inferior Rectus Entrapment | Herniation of inferior rectus muscle and fat into maxillary sinus, tethering globe and preventing upward gaze | SURGICAL EMERGENCY: Stat Ophthalmology/Maxillofacial consult. Look for Oculocardiac Reflex (trigeminovagal reflex causing profound bradycardia, hypotension, and nausea upon upward gaze attempt). |
| Ellis Class | Tissue Layer Involved | Clinical Appearance & Exam | Emergency Management |
|---|---|---|---|
| Ellis Class I | Enamel only | Chipped white tooth edge, non-tender, no color change | Smooth sharp edge with emery board; routine outpatient dental follow-up. |
| Ellis Class II | Enamel + Dentin | Yellowish dentin exposed, sensitive to air and cold fluids | Cover exposed dentin with calcium hydroxide paste (Dycal) or glass ionomer cement to prevent bacterial pulpitis; dental follow-up within 24 hours. |
| Ellis Class III | Enamel + Dentin + Dental Pulp | Pink or red dot of exposed pulp, bleeding from tooth center, exquisitely painful | Cover with calcium hydroxide and composite dressing; urgent dental consult within 24 hours (requires pulpotomy or root canal). |
| Permanent Tooth Avulsion | Complete dislodgement of entire tooth from alveolus | Empty bleeding socket | REPLANTATION WITHIN 60 MINUTES: Handle by crown only; do not scrub root; rinse gently with normal saline; replant directly into socket; splint with Coe-Pak or composite wire. Transport in cold milk or Save-a-Tooth. |
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