Ankle Fractures: Types, Surgery Decisions, and Recovery Expectations

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

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Understanding the Anatomy of Ankle Fractures

The ankle mortise is formed by three bony structures: the medial malleolus (inner bump of the tibia), the lateral malleolus (the fibula), and the posterior malleolus (the back lip of the tibia). A stable, functioning ankle requires that these three structures maintain their precise geometric relationship. Ankle fractures — which involve one, two, or all three of these structures — disrupt this geometry to varying degrees, and the degree of disruption determines whether surgery is necessary.

The Danis-Weber classification (A, B, C) categorizes fractures by the location of the fibular fracture relative to the ankle joint. The Lauge-Hansen classification describes the injury mechanism and predicts associated ligament injuries. Understanding these systems helps explain why apparently similar injuries can have very different treatment requirements.

Isolated Fibular (Lateral Malleolus) Fractures

Isolated lateral malleolus fractures are the most common ankle fractures. Weber A fractures occur below the syndesmosis (ankle joint level) and are typically stable — the medial ankle structures are intact and the mortise is undisturbed. These fractures are managed non-surgically in a walking boot for 4–6 weeks in most patients. Weber B fractures occur at the level of the syndesmosis and require careful assessment of medial and syndesmotic stability — some are treated non-surgically, others require ORIF. Weber C fractures occur above the syndesmosis and always involve syndesmotic disruption, generally requiring surgical fixation.

Bimalleolar Fractures

Bimalleolar fractures involve both the medial and lateral malleoli — significantly destabilizing the ankle mortise. The “bimalleolar equivalent” fracture involves the fibula plus rupture of the deltoid ligament (which connects the tibia to the medial ankle structures) without an actual medial malleolus fracture, but produces equivalent instability. Most bimalleolar fractures are treated surgically with ORIF (open reduction and internal fixation) using lateral fibular plates and medial malleolus screws to restore anatomic alignment and stability. Non-surgical treatment is appropriate primarily for elderly, low-demand patients who cannot tolerate surgical risks.

Trimalleolar Fractures

Trimalleolar fractures involve all three malleoli — the most complex of the common ankle fracture patterns. The posterior malleolus fragment is critical: if it involves more than 25% of the articular surface, it destabilizes the ankle joint and typically requires surgical fixation. The surgical approach to trimalleolar fractures involves sequentially addressing the fibula, then the posterior malleolus (if large enough to require fixation), then the medial malleolus. Recovery from trimalleolar fractures is prolonged — non-weight-bearing for 8–12 weeks, followed by extended rehabilitation. The risk of post-traumatic ankle arthritis is significant even with anatomic reduction.

Maisonneuve Fracture: The Hidden Ankle Fracture

The Maisonneuve fracture is a proximal fibular fracture (high on the outer leg, well above the ankle) combined with complete syndesmotic disruption and often a medial ankle injury (either medial malleolus fracture or deltoid ligament rupture). This injury pattern is frequently missed because the ankle X-rays appear normal — the fibular fracture is well above the field of view. Patients present with ankle pain and swelling, and X-rays reveal no ankle fracture. Proximal fibula tenderness must be specifically checked in all ankle injury evaluations. Maisonneuve fractures uniformly require surgical stabilization of the syndesmosis with screws or suture-button devices. Call Balance Foot & Ankle at (810) 206-1402 for urgent ankle fracture evaluation and care.

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Broke Your Ankle? Understanding Fracture Types and Treatment Options

Ankle fractures range from simple single-bone breaks treatable with a boot to complex fracture-dislocations requiring surgical fixation. Understanding your specific fracture type helps you make informed decisions about treatment and set realistic recovery expectations.

Learn About Ankle Fracture Treatment | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Michelson JD. Fractures about the ankle. Journal of Bone and Joint Surgery. 1995;77(1):142-152.
2. Schepers T, et al. Current concepts in the treatment of malleolar fractures. Injury. 2010;41(10):986-995.
3. SooHoo NF, et al. Complication rates following open reduction and internal fixation of ankle fractures. Journal of Bone and Joint Surgery. 2009;91(5):1042-1049.

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More Podiatrist-Recommended Surgery Essentials

Post-Op Walking Boot

Protected weight-bearing immobilization through the first healing weeks.

Surgical-Scar Healing Lotion

Reduces scar thickness and tenderness as the incision matures.

Return-to-Activity Insole

Supports the reconstructed foot during the first months back on your feet.

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Dr. Tom Biernacki, DPM

Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.