Zygomatic Bone Dislocation: Causes, Symptoms, and Treatment

What is Zygomatic Bone Dislocation?

The zygomatic bone, commonly known as the cheekbone, is a prominent facial bone that forms the structure of your cheek and part of your eye socket. A zygomatic bone dislocation occurs when this bone is moved out of its normal position due to trauma or injury. This condition can lead to facial deformity, pain, and functional issues like difficulty chewing or opening the mouth.

Zygomatic bone dislocations often result from high-impact injuries, such as those sustained in car accidents, sports, or physical altercations. The dislocation may be accompanied by fractures, as the zygomatic bone connects to several other facial bones, including the maxilla (upper jaw) and temporal bone (near the temple).

According to the National Institutes of Health (NIH), zygomatic fractures and dislocations are among the most common facial injuries, accounting for a significant portion of maxillofacial trauma cases.

Common Causes

Zygomatic bone dislocations are typically caused by direct trauma to the face. Here are the most common causes:

• Motor vehicle accidents: High-speed collisions can cause severe facial trauma, leading to dislocations or fractures of the zygomatic bone.
• Sports injuries: Contact sports like football, hockey, boxing, or rugby pose a high risk of facial injuries, especially without proper protective gear.
• Physical assault: Punches or blows to the face, particularly around the cheek area, can dislocate the zygomatic bone.
• Falls: Falling from a height or slipping and hitting the face on a hard surface can cause this injury.
• Workplace accidents: Industrial or construction accidents, especially those involving heavy machinery or falling objects, may result in facial trauma.
• Bicycle or motorcycle accidents: Even with helmets, riders can sustain facial injuries during crashes.
• Recreational activities: Activities like skateboarding, skiing, or horseback riding can lead to falls or collisions that dislocate the cheekbone.
• Domestic accidents: Tripping, running into furniture, or other household mishaps can sometimes cause enough force to dislocate the zygomatic bone.
• Military combat: Explosions, gunfire, or hand-to-hand combat can result in severe facial injuries.
• Animal attacks: Bites or strikes from animals, particularly large dogs or wild animals, can cause significant facial trauma.

In rare cases, medical conditions that weaken the bones, such as osteoporosis or certain cancers, may make the zygomatic bone more susceptible to dislocation from minor trauma.

Associated Symptoms

A zygomatic bone dislocation can cause a variety of symptoms, depending on the severity of the injury and whether other facial structures are affected. Common symptoms include:

• Facial pain or tenderness: Pain is often localized around the cheekbone and may worsen with movement, such as chewing or speaking.
• Swelling and bruising: The cheek and surrounding areas may become swollen and discolored due to tissue damage and bleeding.
• Facial deformity: The cheek may appear flattened, sunken, or asymmetrical compared to the uninjured side.
• Difficulty opening the mouth: The dislocation can interfere with the movement of the jaw, making it hard to open the mouth fully (trismus).
• Numbness or tingling: Damage to nerves near the zygomatic bone, such as the infraorbital nerve, can cause numbness in the cheek, upper lip, or teeth.
• Double vision or blurred vision: If the dislocation affects the eye socket, it may lead to vision problems or difficulty moving the eye.
• Eye pain or swelling: The eye on the affected side may appear swollen, bruised, or misaligned.
• Difficulty chewing: Pain and misalignment can make chewing painful or difficult.
• Nosebleeds: If the injury affects the nasal cavity, it may cause bleeding from the nose.
• Flattened cheekbone: The injured side of the face may appear less prominent or "caved in."

In some cases, the dislocation may also cause enophthalmos (a sunken appearance of the eye) if the injury affects the orbital floor. If you experience any of these symptoms after facial trauma, seek medical attention promptly.

When to See a Doctor

It’s important to see a doctor if you suspect a zygomatic bone dislocation, especially if you experience any of the following:

• Severe or persistent facial pain that doesn’t improve with over-the-counter pain relievers.
• Visible deformity or asymmetry in your face, particularly around the cheekbone.
• Difficulty opening your mouth or chewing.
• Numbness or tingling in your face, especially if it persists or worsens.
• Vision changes, such as double vision, blurred vision, or difficulty moving your eye.
• Significant swelling or bruising that doesn’t improve after a few days.
• Bleeding from the nose or ears that doesn’t stop.
• Signs of infection, such as fever, increased pain, redness, or pus around the injured area.

Even if your symptoms seem mild, it’s wise to consult a healthcare provider. Untreated zygomatic dislocations can lead to long-term complications, such as chronic pain, nerve damage, or persistent facial deformity. A doctor can assess the injury and recommend appropriate treatment to ensure proper healing.

Diagnosis

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

Medical History and Physical Examination

Your doctor will begin by asking about the circumstances of your injury, including how it occurred and the symptoms you’ve experienced. They will then perform a 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 misalignment.
• Checking your range of motion by asking you to open and close your mouth.
• Evaluating your vision and eye movement to detect any nerve or muscle damage.
• Testing for numbness or tingling in your face, which may indicate nerve involvement.

Imaging Tests

To confirm the diagnosis and assess the extent of the injury, your doctor may order one or more of the following imaging tests:

• X-rays: X-rays provide a basic view of the facial bones and can help identify dislocations or fractures. However, they may not show fine details of complex fractures.
• Computed Tomography (CT) Scan: A CT scan is the most common imaging test for facial injuries. It provides detailed, cross-sectional images of the bones and soft tissues, allowing doctors to see the exact location and severity of the dislocation. According to the Mayo Clinic, CT scans are particularly useful for evaluating zygomatic complex fractures, which often accompany dislocations.
• Magnetic Resonance Imaging (MRI): While less common for bone injuries, an MRI may be used if there is concern about soft tissue damage, such as injuries to the muscles, nerves, or blood vessels.

Additional Tests

In some cases, your doctor may recommend additional tests to evaluate related complications:

• Vision testing: If you have vision changes, an ophthalmologist may perform a detailed eye exam.
• Nerve conduction studies: If numbness or weakness persists, these tests can assess nerve function.

Once the diagnosis is confirmed, your doctor will discuss treatment options based on the severity of the dislocation and any associated injuries.

Treatment Options

The treatment for a zygomatic bone dislocation depends on the severity of the injury, the presence of associated fractures, and the patient’s overall health. Treatment options range from conservative measures to surgical intervention.

Non-Surgical Treatment

For mild dislocations without significant fracture or deformity, non-surgical treatments may be sufficient:

• Pain management: Over-the-counter pain relievers, such as ibuprofen (Advil) or acetaminophen (Tylenol), can help manage pain and reduce inflammation. In some cases, your doctor may prescribe stronger pain medications.
• Ice therapy: Applying ice packs to the affected area for 15-20 minutes at a time can help reduce swelling and bruising. Be sure to wrap the ice pack in a cloth to avoid direct contact with the skin.
• Rest and activity modification: Avoid activities that could worsen the injury, such as contact sports or heavy lifting. Resting the facial muscles can promote healing.
• Soft diet: If chewing is painful, stick to soft foods like soups, yogurt, and mashed potatoes to avoid putting strain on the jaw.
• Nasal decongestants: If the injury causes nasal congestion or sinus pressure, decongestants may help relieve symptoms.

Surgical Treatment

For more severe dislocations, especially those accompanied by fractures or significant deformity, surgery may be necessary. Surgical options include:

• Closed reduction: This procedure involves manually realigning the dislocated bone without making an incision. It is typically performed under local or general anesthesia. According to the Cleveland Clinic, closed reduction is often used for simple dislocations where the bone can be easily maneuvered back into place.
• Open reduction and internal fixation (ORIF): For complex fractures or dislocations, surgery may be required to realign the bone and secure it with plates, screws, or wires. This procedure is usually performed by an oral and maxillofacial surgeon or a plastic surgeon. ORIF is often necessary if the dislocation affects the eye socket or other critical structures.
• Orbital reconstruction: If the injury involves the eye socket, additional surgery may be needed to repair the orbital floor or walls to prevent long-term vision problems.

Post-Treatment Care

After treatment, whether surgical or non-surgical, proper care is essential for recovery:

• Follow-up appointments: Regular check-ups with your doctor ensure that the bone is healing correctly and that there are no complications.
• Oral hygiene: If you have incisions in your mouth, your doctor may recommend a special mouth rinse to prevent infection.
• Avoiding strain: Refrain from activities that could stress the healing bone, such as chewing hard foods or participating in contact sports.
• Physical therapy: In some cases, exercises to improve jaw movement and strength may be recommended.

Recovery time varies depending on the severity of the injury and the type of treatment. Mild dislocations may heal in a few weeks, while surgical repairs may require several months for full recovery.

Prevention Tips

While not all zygomatic bone dislocations can be prevented, you can reduce your risk by taking precautions to protect your face from trauma:

• Wear protective gear: If you participate in contact sports (e.g., football, hockey, boxing) or activities with a risk of falls (e.g., skiing, skateboarding), always wear a helmet and face guard. The Centers for Disease Control and Prevention (CDC) emphasizes the importance of proper protective equipment in preventing facial injuries.
• Use seat belts: Always wear a seat belt when driving or riding in a car to reduce the risk of facial trauma in case of an accident.
• Practice workplace safety: If you work in an environment with a risk of falling objects or machinery accidents, wear appropriate safety gear, such as face shields or hard hats.
• Avoid physical altercations: Steer clear of situations that could lead to fights or assaults, which are common causes of facial injuries.
• Childproof your home: If you have young children, secure furniture and use safety gates to prevent falls that could result in facial injuries.
• Be cautious during recreational activities: When engaging in activities like cycling or horseback riding, wear a helmet and stay aware of your surroundings.
• Strengthen your bones: A diet rich in calcium and vitamin D, along with regular weight-bearing exercise, can help maintain bone strength and reduce the risk of fractures from minor trauma.
• Drive safely: Avoid distracted or impaired driving to reduce the risk of car accidents.

If you have a medical condition that weakens your bones, such as osteoporosis, work with your healthcare provider to manage the condition and reduce your risk of fractures.

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 bleeding: Uncontrolled bleeding from the nose, mouth, or ears that doesn’t stop with pressure.
• Difficulty breathing: If the injury affects your airway or causes swelling that makes it hard to breathe.
• Loss of consciousness: Fainting or confusion after the injury, which could indicate a head injury or concussion.
• Severe head or neck pain: Intense pain that doesn’t improve with pain relievers, especially if accompanied by nausea or vomiting.
• Vision loss or sudden changes: Complete or partial loss of vision, or sudden double vision, which could indicate damage to the optic nerve or retina.
• Clear fluid draining from the nose or ears: This could be a sign of a cerebrospinal fluid (CSF) leak, which requires immediate medical attention.
• Severe facial deformity: If your face appears significantly misaligned or "caved in," this may indicate a complex fracture requiring urgent surgery.
• Signs of a stroke: Sudden weakness or numbness on one side of the body, slurred speech, or difficulty walking. While rare, facial trauma can sometimes lead to blood clots or stroke-like symptoms.
• Seizures: Uncontrolled shaking or convulsions, which could indicate a serious brain injury.

If you or someone else experiences any of these symptoms, call emergency services or go to the nearest emergency room immediately. Delaying treatment for severe injuries can lead to permanent damage or life-threatening complications.

Note: This article is for informational purposes only and is not a substitute for professional medical advice. Always consult a healthcare provider for personalized guidance.