Zygomatic Bone Fracture Displacement: Causes, Symptoms, and Treatment

What is Zygomatic Bone Fracture Displacement?

The zygomatic bone, commonly known as the cheekbone, is a prominent facial bone that contributes to the structure of the eye socket, cheek, and side of the face. A zygomatic bone fracture displacement occurs when this bone is broken and the fragments are no longer in their normal alignment. This type of injury can affect facial symmetry, vision, and jaw movement, and it often requires medical intervention to heal properly.

Zygomatic fractures are among the most common facial fractures, second only to nasal bone fractures. They can occur in isolation or as part of more complex facial injuries, such as zygomaticomaxillary complex (ZMC) fractures, which involve multiple bones in the midface region.

Source: National Center for Biotechnology Information (NCBI)

Common Causes

Zygomatic bone fractures typically result from significant force or trauma to the face. Common causes include:

• Motor vehicle accidents: High-impact collisions can cause severe facial trauma, leading to zygomatic fractures. Seatbelts and airbags reduce but do not eliminate this risk.
• Falls: Falling from a height or slipping and hitting the face on a hard surface can fracture the cheekbone, especially in older adults or individuals with osteoporosis.
• Assaults or physical altercations: Punches, kicks, or blows to the face with objects (e.g., bats, bottles) are frequent causes of zygomatic fractures.
• Sports injuries: Contact sports like boxing, hockey, football, or rugby carry a higher risk of facial fractures due to collisions or direct hits.
• Workplace accidents: Industrial or construction workers may sustain facial injuries from falling objects, machinery accidents, or explosions.
• Bicycle or motorcycle accidents: Even with helmets, riders can experience facial trauma during crashes, especially if the helmet does not have a full-face shield.
• Domestic or interpersonal violence: Unfortunately, facial injuries are common in cases of abuse, often involving repeated trauma to the same area.
• Animal attacks: Dog bites or other animal-related injuries can cause severe facial lacerations and fractures.
• Military or combat injuries: Explosions, gunfire, or blunt force trauma in combat zones can lead to complex facial fractures.
• Recreational activities: Activities like skateboarding, skiing, or horseback riding without proper protective gear can result in facial injuries.

Source: Mayo Clinic, Centers for Disease Control and Prevention (CDC)

Associated Symptoms

A displaced zygomatic bone fracture can cause a variety of symptoms, which may vary depending on the severity and location of the fracture. Common signs and symptoms include:

• Facial pain or tenderness: Pain is often localized around the cheekbone and may worsen with movement or touch.
• Swelling and bruising: The cheek and surrounding areas (e.g., under the eye) may become swollen and discolored due to bleeding beneath the skin.
• Facial deformity: The cheek may appear flattened, sunken, or asymmetrical compared to the uninjured side. This is often more noticeable in displaced fractures.
• Difficulty opening the mouth (trismus): The fracture can affect the temporomandibular joint (TMJ) or nearby muscles, limiting jaw movement.
• Numbness or tingling: Damage to the infraorbital nerve, which runs through the zygomatic bone, can cause numbness in the cheek, upper lip, or gum.
• Double vision (diplopia): If the fracture affects the eye socket (orbit), it may disrupt the muscles or nerves controlling eye movement, leading to double vision.
• Eye problems: The eye on the affected side may appear sunken (enophthalmos), bulging (proptosis), or misaligned. There may also be pain or difficulty moving the eye.
• Nosebleeds or nasal discharge: Fractures extending into the sinuses can cause bleeding or leakage of cerebrospinal fluid (CSF) in severe cases.
• Dental issues: Misalignment of the upper and lower teeth (malocclusion) or pain when biting down may occur if the fracture affects the upper jaw.
• Hearing changes: Rarely, fractures extending near the ear can cause hearing loss or a sensation of fullness in the ear.

In some cases, symptoms may not appear immediately after the injury, especially if swelling masks the deformity. However, pain and functional issues (e.g., difficulty chewing) often persist or worsen over time.

Source: Cleveland Clinic, National Institutes of Health (NIH)

When to See a Doctor

If you suspect a zygomatic bone fracture, it is important to seek medical attention promptly. You should see a doctor if you experience any of the following after facial trauma:

• Persistent pain or swelling in the cheekbone that does not improve with ice or over-the-counter pain relievers.
• Visible deformity or asymmetry in the face, such as a flattened or sunken cheek.
• Difficulty opening your mouth fully or pain when chewing.
• Numbness or tingling in the cheek, upper lip, or gum that lasts more than a few hours.
• Double vision, blurred vision, or difficulty moving your eye.
• Bleeding from the nose or ears that does not stop.
• Clear fluid draining from the nose (possible sign of a CSF leak).
• Severe headache, dizziness, or confusion, which could indicate a more serious head injury.

Even if your symptoms seem mild, it is wise to consult a healthcare provider. Untreated zygomatic fractures can lead to long-term complications, such as chronic pain, nerve damage, or persistent facial deformity.

Diagnosis

Diagnosing a zygomatic bone fracture typically involves a combination of physical examination and imaging studies. Here’s what you can expect during the diagnostic process:

Medical History and Physical Examination

Your doctor will ask about the circumstances of your injury, including how it occurred and the symptoms you’ve experienced. They will then perform a thorough physical examination, which may include:

• Inspecting your face for swelling, bruising, or deformities.
• Palpating (gently pressing) the cheekbone and surrounding areas to assess for tenderness, instability, or crepitus (a grating sensation caused by broken bone fragments).
• Checking for numbness or tingling in the face to evaluate nerve damage.
• Assessing your vision, eye movement, and pupil reactivity.
• Examining your jaw movement and bite alignment.
• Looking for signs of other facial or head injuries, such as nasal fractures or concussions.

Imaging Studies

Imaging is essential for confirming the diagnosis and determining the extent of the fracture. Common imaging techniques include:

• X-rays: A Waters' view (a specialized X-ray angle) is often used to visualize the zygomatic bone and assess for fractures. However, X-rays may miss subtle or non-displaced fractures.
• Computed Tomography (CT) scan: A CT scan provides detailed, cross-sectional images of the facial bones and is the gold standard for diagnosing zygomatic fractures. It helps identify the location, displacement, and involvement of nearby structures (e.g., eye socket, sinuses).
• Magnetic Resonance Imaging (MRI): While less common for bone fractures, an MRI may be used if there is concern about soft tissue damage, nerve injury, or complications like hematomas.

In some cases, your doctor may also recommend consulting with specialists, such as an oral and maxillofacial surgeon, ophthalmologist (eye doctor), or neurologist, depending on the severity and associated injuries.

Source: Mayo Clinic, Radiopaedia

Treatment Options

The treatment for a zygomatic bone fracture depends on the severity of the displacement, associated symptoms, and whether other facial structures are involved. Treatment options range from conservative management to surgical intervention.

Non-Surgical Treatment

For non-displaced or minimally displaced fractures (where the bone fragments remain mostly aligned), non-surgical treatment may be sufficient. This typically includes:

• Pain management: Over-the-counter pain relievers like ibuprofen (Advil) or acetaminophen (Tylenol) can help manage pain. Prescription medications may be needed for severe pain.
• Ice therapy: Applying ice packs to the affected area for 15-20 minutes every hour can reduce swelling and discomfort. Always wrap the ice pack in a cloth to avoid skin damage.
• Soft diet: Eating soft or liquid foods (e.g., soups, smoothies, mashed potatoes) for 1-2 weeks can minimize stress on the jaw and cheekbone.
• Activity restriction: Avoiding contact sports, heavy lifting, or activities that could risk further injury to the face.
• Nasal decongestants: If the fracture affects the sinuses, decongestants may help reduce swelling and improve drainage.

Your doctor will monitor your progress with follow-up appointments and imaging studies to ensure the bone is healing correctly.

Surgical Treatment

Surgery is often required for displaced zygomatic fractures, especially if the fracture affects vision, jaw function, or facial symmetry. Surgical options include:

• Closed reduction: This procedure involves manually realigning the bone fragments without making large incisions. It is typically performed under general anesthesia. The surgeon may use specialized instruments to manipulate the bone back into place.
• Open reduction and internal fixation (ORIF): For more complex fractures, the surgeon makes incisions (often inside the mouth or near the eyebrow) to access the broken bone. The fragments are then realigned and secured with titanium plates and screws. This method provides stable fixation and promotes proper healing.
• Orbital reconstruction: If the fracture extends into the eye socket, surgery may be needed to repair the orbital floor or walls to prevent long-term vision problems or eye misalignment.

Surgery is usually performed within 1-2 weeks of the injury to minimize complications like scar tissue formation or nerve damage. Recovery time varies but often involves:

• Avoiding strenuous activities for 4-6 weeks.
• Following a soft or liquid diet for several weeks.
• Keeping the surgical site clean and dry to prevent infection.
• Attending follow-up appointments to monitor healing and remove stitches if necessary.

Source: Journal of Oral and Maxillofacial Surgery, American Association of Oral and Maxillofacial Surgeons (AAOMS)

Prevention Tips

While not all zygomatic bone fractures can be prevented, you can reduce your risk by taking the following precautions:

• Wear protective gear: Use helmets with face shields, mouthguards, and other protective equipment during contact sports, cycling, or motorcycling.
• Drive safely: Always wear a seatbelt in the car, and avoid distracted or impaired driving. Follow traffic laws to reduce the risk of accidents.
• Prevent falls: Use handrails on stairs, install grab bars in bathrooms, and keep walkways clear of clutter, especially for older adults or individuals with mobility issues.
• Avoid risky behaviors: Refrain from activities that increase the likelihood of facial trauma, such as fighting or engaging in reckless behavior.
• Use proper workplace safety measures: If you work in a high-risk environment (e.g., construction), wear appropriate protective gear and follow safety protocols.
• Address domestic violence: If you or someone you know is in an abusive situation, seek help from local resources or organizations that support victims of violence.
• Maintain bone health: A diet rich in calcium and vitamin D, along with regular weight-bearing exercise, can help keep bones strong and less prone to fractures.

Prevention is especially important for individuals with conditions that weaken bones, such as osteoporosis, or those who participate in high-risk activities.

Emergency Warning Signs

Seek immediate medical attention if you experience any of the following symptoms after a facial injury, as they may indicate a severe or life-threatening condition:

• Severe headache or confusion: These could be signs of a traumatic brain injury (TBI) or concussion.
• Loss of consciousness: Even brief unconsciousness after a head injury requires emergency evaluation.
• Clear fluid draining from the nose or ears: This may indicate a cerebrospinal fluid (CSF) leak, which requires urgent treatment to prevent infection.
• Severe or uncontrolled bleeding: Bleeding that does not stop with pressure or soaks through bandages needs immediate attention.
• Vision loss or sudden double vision: These symptoms could signal damage to the optic nerve or other critical structures in the eye.
• Inability to move the eye: If your eye is "stuck" in one position, it may indicate entrapment of eye muscles or nerves.
• Severe facial deformity: A significantly sunken or misaligned cheekbone may require urgent surgical intervention.
• Difficulty breathing or swallowing: These could indicate airway obstruction or damage to the throat.
• Signs of infection: Fever, increasing pain, redness, or pus around the injury site may signal an infection that needs prompt treatment.

If you or someone else experiences these symptoms, call emergency services or go to the nearest emergency room immediately. Do not attempt to drive yourself if you are experiencing severe symptoms.

Source: World Health Organization (WHO), CDC Heads Up Initiative

Zygomatic bone fracture displacement is a serious injury that requires timely and appropriate medical care. By understanding the causes, symptoms, and treatment options, you can take steps to protect your health and seek help when needed. Always consult a healthcare professional for personalized advice and treatment.