12.2 Recognizing and Triaging Dental Emergencies
Key Takeaways
- Airway compromise from Ludwig angina or a rapidly expanding submandibular infection is the highest-priority dental emergency and requires immediate hospital transfer
- An avulsed permanent tooth should be replanted immediately at the site, and if that is impossible it should be stored in Hank balanced salt solution, milk, or saliva rather than water
- Alveolar osteitis presents three to five days after extraction with severe throbbing pain, an empty socket, and no fever or purulence, and is managed with irrigation and a medicated dressing
- Definitive management of an odontogenic abscess is removal of the source and drainage, with antibiotics as an adjunct rather than a substitute
- Post-extraction bleeding is first managed with firm gauze pressure for 20 to 30 minutes on a correctly positioned pack before escalating to local hemostatic agents and suturing
Recognizing and Triaging Dental Emergencies
Why this matters on the INBDE: Clinical Content area 17 asks you to prevent, recognize, and manage dental emergencies, and area 18 covers acute pain, hemorrhage, trauma, and infection of the orofacial complex. Triage items are common because they have a single defensible ordering.
The Triage Hierarchy
Sort every emergency call and every walk-in in this order:
| Priority | Threat | Presentations | Action |
|---|---|---|---|
| 1 | Airway | Ludwig angina, rapidly expanding submandibular or sublingual swelling, elevated floor of mouth, drooling, dysphagia, trismus, stridor, inability to lie flat, "hot potato" voice | Activate emergency medical services and transfer to hospital immediately. Do not attempt office drainage |
| 2 | Uncontrolled hemorrhage | Post-extraction bleeding unresponsive to pressure, bleeding in an anticoagulated or coagulopathic patient, arterial bleeding | Direct pressure, local hemostatics, suture; transfuse or transfer if not controlled |
| 3 | Spreading infection with systemic signs | Fever, malaise, tachycardia, cellulitis crossing fascial planes, periorbital swelling, trismus | Source removal and drainage, antibiotics, close follow-up; transfer if systemically unwell or airway is threatened |
| 4 | Trauma | Avulsion, luxation, alveolar or jaw fracture | Time-critical for avulsion; rule out head injury first |
| 5 | Severe pain without systemic threat | Irreversible pulpitis, acute apical periodontitis, alveolar osteitis, pericoronitis | Definitive source treatment, not analgesics alone |
| 6 | Function and esthetics | Lost crown or restoration, fractured denture, displaced orthodontic wire | Interim management; schedule definitive care |
Every emergency assessment begins with a medical history, vital signs, and a screen for airway compromise. A patient who cannot lie flat, cannot swallow their own saliva, or has an elevated tongue is a transfer, not an appointment.
Odontogenic Infections
Definitive treatment is source removal and drainage. Antibiotics are adjunctive. An antibiotic prescribed without addressing the source converts an acute abscess into a chronic one and selects for resistance.
Indications for antibiotics alongside definitive treatment: systemic involvement (fever, malaise, lymphadenopathy, tachycardia), diffuse cellulitis rather than a localized fluctuant abscess, rapid progression, an immunocompromised host, and infection that has spread into fascial spaces.
First-line agents: amoxicillin, or penicillin VK; amoxicillin-clavulanate or the addition of metronidazole for infections that fail to respond or are likely anaerobic. For non-anaphylactic penicillin allergy, cephalexin; for anaphylactic allergy, clindamycin or azithromycin, weighed against clindamycin's association with Clostridioides difficile colitis.
Fascial space danger signs:
- Submandibular, sublingual, and submental involvement bilaterally = Ludwig angina — a rapidly spreading cellulitis that elevates the tongue and obstructs the airway. Immediate hospital transfer and surgical airway readiness.
- Periorbital and canine space swelling from a maxillary anterior tooth — risk of cavernous sinus thrombosis through the valveless facial venous system.
- Lateral pharyngeal and retropharyngeal spread — risk of descending mediastinitis, which carries very high mortality.
Dental Trauma
Avulsion of a permanent tooth
Time out of the socket and the condition of the periodontal ligament cells determine the outcome.
- Replant immediately at the site if at all possible. Handle the tooth by the crown only; do not scrub the root.
- If replantation is not possible, place the tooth in the best available storage medium: Hank balanced salt solution (best), cold milk, saliva (in the buccal vestibule if the patient is alert, or in a cup), or sterile saline. Never use tap water, which is hypotonic and lyses periodontal ligament cells, and never allow the tooth to dry.
- At the office: rinse gently with saline, replant, verify position radiographically, and splint with a flexible, passive splint for about 2 weeks.
- Prescribe systemic antibiotics, check tetanus status, and provide a soft diet and chlorhexidine rinse.
- Initiate root canal therapy in 7 to 10 days for a tooth with a closed apex. For an open apex, revascularization may occur and the tooth is monitored.
Avulsed primary teeth are not replanted — replantation risks damaging the developing permanent successor.
Other trauma patterns
| Injury | Management |
|---|---|
| Concussion | Tender to percussion, no mobility or displacement — occlusal relief, monitor vitality |
| Subluxation | Mobile, not displaced — flexible splint up to 2 weeks if needed, monitor |
| Extrusive luxation | Reposition, flexible splint ~2 weeks |
| Lateral luxation | Reposition, flexible splint ~4 weeks (bone plate is fractured) |
| Intrusive luxation | Depends on apical maturity: open apex may re-erupt spontaneously; closed apex requires repositioning and endodontics |
| Crown fracture, enamel-dentin | Cover exposed dentin promptly; restore |
| Crown fracture with pulp exposure | Vital pulp therapy — direct pulp cap or partial (Cvek) pulpotomy — especially valuable in immature teeth |
| Root fracture | Reposition coronal segment, rigid splint 4 weeks (up to 4 months for cervical-third fractures) |
| Alveolar fracture | Reposition, rigid splint 4 weeks |
Always rule out head injury in facial trauma: loss of consciousness, amnesia, vomiting, unequal pupils, or clear rhinorrhea or otorrhea mandates immediate medical evaluation before dental treatment.
Post-Extraction Complications
| Complication | Presentation | Management |
|---|---|---|
| Immediate bleeding | Oozing at or shortly after surgery | Firm gauze pressure directly over the socket for 20–30 minutes — a pack the patient is merely holding between the teeth does not compress the socket. Then local hemostatics (oxidized cellulose, gelatin sponge, topical thrombin, tranexamic acid rinse), suture, and reassess |
| Alveolar osteitis (dry socket) | Severe throbbing pain 3–5 days postoperatively, empty socket with exposed bone, foul odor and taste, no fever, no purulence, no swelling | Gentle irrigation with saline, placement of a medicated (eugenol-based) dressing, analgesia; antibiotics are not indicated because it is not an infection |
| Infected socket | Pain with swelling, purulence, fever | Drainage, debridement, antibiotics |
| Oroantral communication | Positive nose-blowing test, air or fluid passage, after maxillary molar extraction | Small (under 2 mm): allow clot, sinus precautions. Larger: primary closure or flap repair, antibiotics, decongestants |
| Trismus | Limited opening after inferior alveolar block or surgery | Heat, analgesics, gentle exercises, soft diet; rule out infection |
| Paresthesia | Altered sensation of lip, chin, or tongue | Document extent with mapping, reassure, review at intervals; most resolve; refer if persisting beyond several weeks |
Other Common Presentations
- Pericoronitis — inflamed operculum over a partially erupted third molar, foul taste, trismus. Debride and irrigate under the operculum, relieve traumatic occlusion from the opposing tooth, warm saline rinses; antibiotics only with systemic involvement or trismus; plan definitive removal of the tooth or the operculum.
- Acute necrotizing ulcerative gingivitis — punched-out, ulcerated, necrotic interdental papillae with a gray pseudomembrane, spontaneous bleeding, marked halitosis, and pain, typically in a stressed, smoking, or immunocompromised patient. Gentle debridement, hydrogen peroxide or chlorhexidine rinses, analgesia, metronidazole if systemic involvement; then definitive periodontal care and screening for underlying immunosuppression.
- Lost crown or restoration — recement or place an interim restoration and protect the pulp; not an emergency unless there is pain or an airway risk from a swallowed or aspirated crown. Aspiration requires urgent chest imaging.
- Cracked tooth with acute pain — occlusal reduction and a band or interim crown to hold the segments together while a definitive plan is made.
A pattern the examination rewards: when the options include an antibiotic prescription and a definitive procedure, the definitive procedure is almost always the answer, with antibiotics added only when systemic or spreading signs are present.
A 42-year-old presents with bilateral submandibular and sublingual swelling, an elevated tongue, drooling, and difficulty swallowing. He is unable to lie flat. What is the immediate action?
A 12-year-old avulses a maxillary central incisor at a soccer field. The parent calls the office within five minutes. What is the best instruction?
Four days after an uncomplicated mandibular molar extraction, a patient reports severe throbbing pain radiating to the ear, with a foul taste. Examination shows an empty socket with exposed bone, no swelling, no purulence, and no fever. What is the appropriate management?
A patient returns two hours after an extraction with continued oozing. What is the first management step?