Ankle Fracture – Causes, Symptoms and Treatment
An ankle fracture is a break in one or more of the bones forming the ankle joint. It commonly results from twisting or a fall and often requires targeted medical treatment.
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An ankle fracture is a break in one or more of the bones forming the ankle joint. It commonly results from twisting or a fall and often requires targeted medical treatment.
What Is an Ankle Fracture?
An ankle fracture refers to a break in one or more of the bones that make up the ankle joint (articulatio talocruralis). The most commonly affected bones are the medial malleolus (inner ankle), the lateral malleolus (outer ankle, part of the fibula), and the posterior malleolus (back portion of the tibia). The ankle joint connects the lower leg to the foot and is essential for walking, standing, and running.
Causes
Ankle fractures are most often caused by sudden, forceful stress on the joint. Common causes include:
- Twisting of the foot (supination trauma) during sports or everyday activities
- Falls from height with impact on the foot
- Motor vehicle accidents
- Direct blows or crush injuries to the ankle area
- Stress fractures from repetitive overuse (e.g., in competitive athletes)
Symptoms
The symptoms of an ankle fracture are typically immediate and pronounced after the injury:
- Severe pain around the ankle, especially with weight-bearing
- Swelling and bruising around the ankle joint
- Visible deformity of the joint in more severe fractures
- Limited or absent range of motion in the foot
- Tenderness when pressing on the malleoli
- A feeling of instability in the joint
Classification
Ankle fractures are commonly classified using the Weber classification, which is based on the level of the fibular fracture in relation to the syndesmosis (the ligamentous connection between the tibia and fibula):
- Weber A: Fracture below the syndesmosis, usually stable
- Weber B: Fracture at the level of the syndesmosis, variable stability
- Weber C: Fracture above the syndesmosis, often unstable with syndesmotic injury
In addition, bimalleolar fractures (involving both malleoli) and trimalleolar fractures (involving all three malleoli) represent more complex injury patterns requiring more extensive treatment.
Diagnosis
Diagnosis is established through a combination of clinical examination and imaging studies:
- Physical examination: Palpation of the ankle, assessment of mobility and stability
- X-ray: Standard imaging method for detecting fractures around the ankle (performed in two planes)
- Computed tomography (CT): Used for complex fractures or detailed surgical planning
- Magnetic resonance imaging (MRI): To assess ligament or cartilage injuries
The Ottawa Ankle Rules are a validated clinical decision tool that helps physicians determine whether imaging is necessary after an ankle injury.
Treatment
Conservative Treatment
Stable fractures (e.g., Weber A) can often be managed without surgery. Treatment measures include:
- Immobilization with a cast or orthotic boot
- Non-weight-bearing with crutches
- Icing and elevation of the leg to reduce swelling
- Pain management with analgesics (e.g., ibuprofen, paracetamol)
- Thromboprophylaxis (anticoagulation) during periods of immobilization
Surgical Treatment
Unstable or displaced fractures (e.g., Weber B with instability, Weber C) typically require surgery:
- Open reduction and internal fixation (ORIF): Bone fragments are repositioned and secured with plates, screws, or wires
- Syndesmotic screw fixation: Used when the syndesmosis is disrupted to restore stability between the tibia and fibula
Rehabilitation
After initial treatment, targeted physiotherapy is essential for a full recovery. This includes strengthening exercises, balance training, and a gradual return to full weight-bearing. Complete rehabilitation may take between 6 weeks and several months, depending on the severity of the injury.
Possible Complications
- Post-traumatic osteoarthritis of the ankle joint
- Chronic joint instability
- Wound healing problems following surgery
- Deep vein thrombosis or pulmonary embolism during prolonged immobilization
- Malunion (improper healing) of the bone
References
- Rüedi, T. P., Buckley, R. E., Moran, C. G. (Eds.) - AO Principles of Fracture Management, 2nd edition, Thieme (2007)
- Stiell, I. G. et al. - The Ottawa Ankle Rules. Annals of Emergency Medicine, 26(4), 484-491 (1995)
- Hak, D. J., Egol, K. A. - Ankle Fractures. In: Rockwood and Green's Fractures in Adults, 9th edition, Wolters Kluwer (2020)
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