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Jaw Fracture: Causes, Symptoms & Treatment

A jaw fracture is a break in the bones of the upper or lower jaw, most commonly caused by accidents or blunt force trauma. Medical or surgical treatment is usually required.

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Things worth knowing about "Jaw fracture"

A jaw fracture is a break in the bones of the upper or lower jaw, most commonly caused by accidents or blunt force trauma. Medical or surgical treatment is usually required.

What is a Jaw Fracture?

A jaw fracture refers to a break in the bones of the upper jaw (maxilla) or lower jaw (mandible). The mandible is the most frequently fractured facial bone due to its prominent position. Jaw fractures can range from minor, hairline cracks to severe, displaced breaks requiring surgical intervention.

Causes

Jaw fractures are most commonly caused by external trauma. Typical causes include:

Road traffic accidents (e.g., bicycle, motorcycle, or car accidents)
Falls from height
Physical assaults or fights
Sports injuries (e.g., contact sports, martial arts, cycling)
Workplace accidents
In rare cases: pathological fractures caused by underlying conditions such as bone tumors or osteoporosis

Symptoms

Symptoms of a jaw fracture can vary depending on the severity and location of the break. Common signs include:

Severe pain in the jaw and facial area
Swelling and bruising (hematoma) around the face and jaw
Misalignment of the teeth (malocclusion) – the upper and lower teeth no longer fit together properly
Restricted or painful mouth opening (trismus)
Numbness or tingling in the chin or lower lip (due to nerve involvement)
Visible deformity or step formation along the jawline
Bleeding inside the mouth
Difficulty chewing and speaking

Diagnosis

Diagnosis of a jaw fracture is established through clinical examination and imaging studies:

Clinical examination: Palpation of the jaw, assessment of mouth opening and dental alignment
X-ray (OPG): A panoramic radiograph of the jaw is typically the first imaging step
Computed tomography (CT): Used for complex or multiple fractures to precisely determine the position and displacement of bone fragments

Treatment

Treatment depends on the type, location, and severity of the fracture. Two main approaches are available:

Conservative Treatment

Simple, non-displaced fractures may be managed conservatively. The jaw is immobilized using intermaxillary fixation, which involves wiring the upper and lower jaws together. The patient must follow a liquid or pureed diet during the healing period.

Surgical Treatment

Displaced or complex fractures typically require surgery. The bone fragments are repositioned and stabilized using titanium plates and screws (open reduction and internal fixation / osteosynthesis). The procedure is usually performed under general anesthesia by an oral and maxillofacial surgeon.

Supportive Measures

Pain relief using analgesics and anti-inflammatory medications
Antibiotics to prevent infection, particularly in open fractures within the oral cavity
Physiotherapy to restore full jaw function after healing

Healing and Prognosis

The healing process for a jaw fracture typically takes 4 to 8 weeks. In uncomplicated cases, full restoration of jaw function is expected. Possible complications include infection, improper bone healing (malunion or pseudarthrosis), or permanent nerve damage, all of which can prolong recovery. Regular follow-up appointments with the maxillofacial surgeon are essential to monitor healing progress.

References

Rowe, N.L. & Williams, J.L. (eds.) – Maxillofacial Injuries, 2nd edition, Churchill Livingstone, 1994.
Nair, M.K. & Nair, U.P. – Imaging of mandibular trauma: ROC methodology. Academic Emergency Medicine, 2001; 8(7):689–695.
Erdmann, D. et al. – Facial fractures: A review of current treatment strategies. Clinics in Plastic Surgery, 2005; 32(3):355–369.

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