Ankle Fractures (Broken Ankle): Causes, Types, Treatment, Surgery, and Recovery — Foot & Ankle Specialist in North Texas

A broken ankle is one of the most common injuries seen in emergency rooms and orthopedic clinics — and one of the most important to get right. Ankle fractures account for nearly 675,000 emergency department visits over a recent 5-year period in the United States alone, and the incidence is expected to increase by 300% in the elderly population in the coming decades. Whether it happens during a soccer game at McKinney ISD, a misstep on the stairs, or a fall on an icy North Texas morning, a broken ankle requires prompt evaluation and proper treatment to avoid long-term problems like chronic pain, stiffness, and arthritis.

With offices in McKinney and Flower Mound, Dr. Sarang Desai provides expert diagnosis and treatment of ankle fractures for patients across Allen, Frisco, Plano, Prosper, and the greater Dallas-Fort Worth area. From simple fractures that heal in a boot to complex injuries requiring surgical reconstruction, our clinic offers comprehensive, evidence-based care to get you back on your feet.

What Is an Ankle Fracture?

An ankle fracture is a break in one or more of the bones that make up the ankle joint. The ankle is formed by three bones:

- Tibia — the larger shinbone; its lower end forms the inner bump of the ankle (medial malleolus) and the flat surface (plafond) that the foot sits under

- Fibula — the thinner bone on the outside of the leg; its lower end forms the outer bump of the ankle (lateral malleolus)

- Talus — the bone that sits between the tibia and fibula and connects the leg to the foot

These bones are held together by a complex system of ligaments, including the deltoid ligament on the inside, the lateral ligaments on the outside (the same ligaments injured in an ankle sprain), and the syndesmosis — a group of ligaments that binds the tibia and fibula together just above the ankle joint.

An ankle fracture can involve one, two, or all three of the bony prominences (malleoli), and may also include damage to the ligaments and syndesmosis. The severity of the fracture — and whether surgery is needed — depends on how many bones are broken, how displaced (out of position) the fragments are, and whether the ankle joint is stable.

Types of Ankle Fractures

Ankle fractures are classified by the number of malleoli involved and by the location of the fibula fracture relative to the syndesmosis:

By number of malleoli fractured:

- Unimalleolar fracture — a break in one malleolus (most commonly the lateral malleolus). This is the most common type, accounting for approximately 70% of all ankle fractures

- Bimalleolar fracture — breaks in two malleoli (typically the lateral and medial malleolus). These account for about 23% of ankle fractures and are inherently unstable, usually requiring surgery

- Trimalleolar fracture — breaks in all three malleoli (lateral, medial, and posterior). These account for about 7% of ankle fractures and are the most complex, almost always requiring surgical repair

- Bimalleolar equivalent — a lateral malleolus fracture combined with a deltoid ligament tear on the inside (rather than a medial malleolus fracture). This is functionally unstable and typically treated like a bimalleolar fracture

By the Weber classification (location of fibula fracture):

The Weber system classifies fibula fractures based on their relationship to the syndesmosis — the ligament complex that holds the tibia and fibula together:

- Weber A — fracture below the syndesmosis. These are typically stable injuries that often heal without surgery. They account for about 31% of ankle fractures

- Weber B — fracture at the level of the syndesmosis. These are the most common type (about 42%) and may be stable or unstable depending on whether the syndesmosis and deltoid ligament are intact

- Weber C — fracture above the syndesmosis. These almost always involve syndesmotic disruption and are unstable, typically requiring surgery. They account for about 19% of ankle fractures

Understanding the fracture type is critical because it determines whether the ankle is stable or unstable — and therefore whether surgery is needed.

What Causes Ankle Fractures?

The most common causes of ankle fractures are:

- Falls — the most common cause overall, accounting for approximately 55% of ankle fractures

- Sports injuries — the second most common cause (about 21%), particularly in soccer, basketball, football, and court sports

- Exercise-related injuries — about 17%, including running and training activities

- Twisting injuries — the ankle rolls inward or outward with enough force to break bone rather than just stretch ligaments

- Direct trauma — a direct blow to the ankle, such as in a car accident or heavy object falling on the foot

Who is at risk?

- Young men (ages 10–19) have the highest incidence, primarily from sports injuries

- Women over 50 have increasing rates, primarily from falls — women are affected more than men overall (56% vs. 44%)

- The elderly are at particular risk due to osteoporosis and balance problems

- Athletes in contact and cutting sports (soccer, basketball, football)

- Patients with osteoporosis, diabetes, or peripheral neuropathy

The ankle sprain connection: Many ankle fractures occur through the same mechanism as an ankle sprain — an inversion (rolling inward) or eversion (rolling outward) injury. The difference is the amount of force: lower forces stretch or tear ligaments (sprain), while higher forces break bone (fracture). In some cases, both occur simultaneously. This is why every significant ankle injury should be evaluated to rule out a fracture, especially if there is an inability to bear weight.

Symptoms of an Ankle Fracture

Ankle fracture symptoms can overlap significantly with a severe ankle sprain, which is why proper evaluation is essential:

- Immediate, severe pain at the time of injury

- Swelling — often rapid and significant

- Bruising — may develop within hours to days

- Inability to bear weight or walk on the affected leg

- Visible deformity — the ankle may appear crooked, angled, or out of position (this indicates a displaced fracture or dislocation and requires emergency care)

- Tenderness when pressing on the bony prominences (malleoli)

- Pain that worsens with any attempt to move the ankle

- A "pop" or "crack" felt or heard at the time of injury

When to go to the emergency room:

- Visible deformity of the ankle

- Bone protruding through the skin (open fracture — a surgical emergency)

- Numbness, tingling, or loss of pulse in the foot (may indicate vascular or nerve injury)

- Severe swelling with skin blistering or color changes

- Inability to bear any weight

How Are Ankle Fractures Diagnosed?

The Ottawa Ankle Rules

Not every ankle injury needs an X-ray. The Ottawa Ankle Rules are a validated clinical decision tool used to determine whether imaging is necessary after an ankle injury. X-rays are recommended if there is pain in the ankle region AND any of the following:

- Bone tenderness at the posterior edge or tip of the lateral malleolus

- Bone tenderness at the posterior edge or tip of the medial malleolus

- Bone tenderness at the navicular bone or base of the fifth metatarsal

- Inability to bear weight for four steps (even if limping)

The Ottawa Ankle Rules have a sensitivity of 92% to 100% for detecting fractures, meaning they are extremely reliable at ruling out a fracture when negative. They have been validated in adults and children over 5 years of age and have significantly reduced unnecessary X-rays in emergency departments worldwide.

Imaging:

- X-rays — the first-line imaging study. Standard views include anteroposterior (AP), lateral, and mortise views. X-rays can identify fracture location, displacement, and joint alignment. Key measurements include the medial clear space (should be less than 4 mm), tibiofibular overlap, and talar tilt

- CT scan — used for complex fractures, particularly to evaluate posterior malleolus fractures, intra-articular fragments, and syndesmotic injuries. CT provides detailed 3D information that helps with surgical planning

- MRI — not typically needed for acute fractures but may be used to evaluate ligament injuries (deltoid, syndesmosis), cartilage damage, or occult fractures not visible on X-ray

- Weight-bearing X-rays or CT — increasingly used to assess ankle stability. Research shows that lateral malleolar fractures that remain congruent (properly aligned) under weight-bearing can often be safely treated without surgery, even if they appear concerning on non-weight-bearing films

- Stress views — gravity stress or manual stress radiographs can help assess deltoid ligament integrity and ankle stability

Treatment for Ankle Fractures

The fundamental goal of ankle fracture treatment is to restore the normal anatomy of the ankle joint — specifically, ensuring that the talus sits perfectly centered under the tibia. Even 1 mm of lateral shift of the talus can reduce the contact area of the ankle joint by 42%, dramatically increasing the risk of post-traumatic arthritis.

Non-Surgical (Conservative) Treatment

Conservative treatment is appropriate for stable, minimally displaced fractures where the ankle joint remains congruent:

Typical candidates for non-surgical treatment:

- Isolated, non-displaced lateral malleolus fractures (Weber A and stable Weber B)

- Isolated, non-displaced medial malleolus fractures

- Fractures that remain congruent on weight-bearing X-rays

- Patients who are not surgical candidates due to medical comorbidities

Conservative treatment protocol:

- Initial immobilization — a short leg splint or posterior splint is applied in the emergency department to protect the ankle and control swelling

- Transition to a walking boot or cast — once swelling has decreased (usually within 1–2 weeks), a below-knee walking boot, air cast, or short leg cast is applied. Research shows that walking boots, air casts, and ankle braces all give comparable results for stable fractures

- Weight-bearing — for stable fractures, early weight-bearing (within 2–3 weeks) is increasingly supported by evidence. Studies show that early weight-bearing leads to faster recovery, improved early function, reduced pain, and earlier return to work without increasing complication rates

- Duration of immobilization — typically 6 weeks, though this varies based on fracture healing

- Follow-up X-rays — obtained at regular intervals (usually 1, 2, and 6 weeks) to ensure the fracture remains aligned during healing

- Physical therapy — begun once the fracture has healed sufficiently, focusing on range of motion, strengthening, balance, and proprioception

Surgical Treatment: Open Reduction and Internal Fixation (ORIF)

Surgery is indicated for unstable fractures where the ankle joint is not congruent or the fracture is significantly displaced:

Typical candidates for surgery:

- Bimalleolar and trimalleolar fractures

- Bimalleolar equivalent injuries (lateral malleolus fracture + deltoid ligament tear with widened medial clear space)

- Displaced lateral malleolus fractures (Weber B with syndesmotic or deltoid injury, Weber C)

- Any fracture with talar shift or joint incongruity

- Open fractures (bone through skin — surgical emergency)

- Fracture-dislocations

What happens during ankle fracture surgery (ORIF)?

ORIF stands for Open Reduction and Internal Fixation:

- Open reduction — the surgeon makes incisions to directly visualize the fracture and restore the bones to their normal anatomic position

- Internal fixation — the bones are held in place with metal hardware:

  - Lateral malleolus — typically fixed with a metal plate and screws (neutralization plate with lag screw) or, in some cases, an intramedullary device

  - Medial malleolus — typically fixed with lag screws or tension band wires. Vertical fracture patterns may require a buttress plate

  - Posterior malleolus — fixed with lag screws or a posterior buttress plate, depending on the fragment size and displacement

  - Syndesmosis — if the syndesmosis is disrupted, it is stabilized with screws or suture button devices to restore the relationship between the tibia and fibula

Timing of surgery:

- Ideally performed within 24–48 hours if swelling permits

- If there is severe soft tissue swelling or blistering, surgery may be delayed 7–14 days until the soft tissues recover. A temporary external fixator or splint may be used in the interim to maintain alignment

- Fracture-dislocations require emergent reduction (putting the joint back in place) in the emergency department, even before definitive surgery

Surgical outcomes:

Studies show that ORIF produces a significantly higher effective treatment rate (approximately 97%) compared to conservative management with casting (approximately 85%) for unstable fractures. ORIF leads to better fracture alignment, shorter recovery times, and fewer complications including nonunion.

Syndesmotic Injuries

The syndesmosis — the ligament complex binding the tibia and fibula together — is injured in 20–40% of ankle sprains and 20–100% of ankle fractures depending on the fracture type. Syndesmotic injuries are a critical component of ankle fractures because:

- Unrecognized or inadequately treated syndesmotic injuries are a leading cause of poor outcomes after ankle fracture surgery

- The quality of syndesmotic reduction is the single most important factor in preventing post-traumatic arthritis

- Syndesmotic fixation options include traditional screws and newer suture button devices

- Early weight-bearing after syndesmotic fixation (starting at 2 weeks) has been shown to be safe and leads to faster return to work and sports compared to delayed weight-bearing

Complications of Ankle Fractures

Short-term complications:

- Wound infection (more common in open fractures, diabetic patients, and smokers)

- Hardware irritation — the plates and screws may cause discomfort, particularly over the lateral malleolus, and may need to be removed after healing

- Deep vein thrombosis (DVT) — blood clots in the leg veins

- Nerve injury — particularly the superficial peroneal nerve on the lateral side

- Compartment syndrome — a rare but serious emergency requiring immediate surgical intervention

Long-term complications:

- Post-traumatic arthritis — the most significant long-term concern. Up to 28% of patients under 50 develop post-traumatic arthritis after ankle fracture surgery, and rates are even higher (up to 70%) for high-energy fracture-dislocations. Risk factors include obesity (BMI ≥30), fracture-dislocation injury, large posterior malleolus fractures, and residual joint incongruity after surgery

- Stiffness — reduced range of motion is common after prolonged immobilization

- Chronic pain — may persist in some patients, particularly those with cartilage damage

- Malunion or nonunion — the fracture heals in a poor position or fails to heal

- Chronic ankle instability — if associated ligament injuries are not addressed, patients may develop recurrent instability similar to that seen after ankle sprains

Recovery Timeline After an Ankle Fracture

Recovery depends on the severity of the fracture and whether surgery was performed:

Non-surgical (stable fractures):

- Weeks 1–2: Splint, elevation, ice, limited weight-bearing

- Weeks 2–6: Walking boot or cast; gradual increase in weight-bearing as tolerated

- Week 6: X-rays to confirm healing; transition out of boot

- Weeks 6–12: Physical therapy for range of motion, strengthening, and balance

- Months 3–6: Gradual return to full activity and sports

After surgery (ORIF):

- Weeks 1–2: Splint, elevation, non-weight-bearing or toe-touch weight-bearing. Wound check and suture removal at approximately 2 weeks

- Weeks 2–6: Transition to a walking boot. Weight-bearing is individualized based on fracture pattern and fixation — early weight-bearing (starting at 2 weeks) is increasingly supported for anatomically reduced fractures with rigid fixation

- Week 6: X-rays to assess healing. Begin transitioning out of boot

- Weeks 6–12: Progressive physical therapy — range of motion, strengthening, proprioception, and balance training

- Months 3–6: Return to full activity and sports for most patients

- 6–12 months: Medium- and long-term functional outcomes are generally similar regardless of whether early or delayed weight-bearing was used, though early weight-bearing accelerates short-term recovery

Important: Bone typically takes about 6 weeks to heal, but full recovery — including return to normal activities and sports — can take 3 to 6 months or longer. Even short periods of immobilization (as little as 5 days) can cause substantial muscle atrophy, which is why early rehabilitation is so important.

Ankle Fractures vs. Ankle Sprains: How to Tell the Difference

Because ankle fractures and ankle sprains often occur through the same mechanism, it can be difficult to tell them apart without imaging. Key differences include:

- Inability to bear weight — more suggestive of a fracture

- Bony tenderness (pain when pressing directly on the malleoli) — more suggestive of a fracture

- Soft tissue tenderness (pain in front of or below the malleoli) — more suggestive of a sprain

- Visible deformity — indicates a fracture or dislocation

- The Ottawa Ankle Rules — the most reliable way to determine if X-rays are needed

When in doubt, seek evaluation. A missed ankle fracture that is treated as a sprain can lead to malunion, chronic instability, and early arthritis.

Ankle Fractures and Related Conditions

Ankle fractures often coexist with or are confused with other foot and ankle conditions:

- Ankle sprains and chronic ankle instability — the same mechanism that causes a sprain can cause a fracture; both can occur simultaneously

- Stress fractures — unlike acute ankle fractures caused by a single traumatic event, stress fractures develop gradually from repetitive loading. The fibula and medial malleolus are common sites for both acute and stress fractures

- Peroneal tendon injuries — the peroneal tendons run directly behind the lateral malleolus and can be injured during an ankle fracture. Peroneal tendon subluxation can also mimic or accompany a lateral malleolus fracture

- Osteochondral lesions of the talus — cartilage and bone damage on the talus surface can occur during an ankle fracture and may cause persistent pain and swelling after the fracture has healed

- Fifth metatarsal fractures — the base of the fifth metatarsal (Jones fracture zone) can be fractured during the same twisting injury that causes an ankle fracture. The Ottawa Ankle Rules include palpation of this area for this reason

Prevention Tips

- Strengthen the ankle — balance exercises, proprioception training, and peroneal strengthening reduce the risk of ankle injuries. These same exercises are recommended for preventing ankle sprains

- Wear appropriate footwear — supportive shoes with good traction, especially during sports and on slippery surfaces

- Use ankle braces — athletes with a history of ankle sprains or instability should consider prophylactic ankle bracing during sports

- Maintain bone health — adequate calcium (1,000–1,500 mg daily) and vitamin D, weight-bearing exercise, and screening for osteoporosis in at-risk populations

- Fall prevention — for older adults, home safety modifications, balance training, and vision correction can reduce fall risk

- Treat ankle instability — chronic ankle instability from untreated ankle sprains increases the risk of future fractures

Key Takeaways

- Ankle fractures are one of the most common lower limb fractures, with an incidence of 42 to 187 per 100,000 people

- The most common causes are falls (55%), sports injuries (21%), and exercise-related injuries (17%)

- Fractures are classified by the number of malleoli involved (uni-, bi-, trimalleolar) and by the Weber system (A, B, or C based on fibula fracture location relative to the syndesmosis)

- The Ottawa Ankle Rules are a highly reliable tool (92–100% sensitivity) for determining whether X-rays are needed

- Stable, non-displaced fractures can often be treated without surgery using a walking boot and early weight-bearing

- Unstable fractures (bimalleolar, trimalleolar, displaced, or with joint incongruity) require surgical fixation (ORIF) to restore anatomy

- Even 1 mm of talar shift can reduce ankle joint contact area by 42%, increasing arthritis risk — accurate reduction is critical

- Post-traumatic arthritis develops in up to 28% of patients under 50 after ankle fracture surgery

- Early weight-bearing after surgery (starting at 2 weeks) is safe for selected patients and accelerates short-term recovery

- Bone heals in about 6 weeks, but full recovery takes 3 to 6 months

- A missed fracture treated as a sprain can lead to malunion, instability, and early arthritis — when in doubt, get evaluated

Serving the North Texas Community

With offices in McKinney and Flower Mound, Dr. Sarang Desai provides expert diagnosis and treatment of ankle fractures and all foot and ankle conditions for patients across Allen, Frisco, Plano, Prosper, and the greater Dallas-Fort Worth area. Whether you need a walking boot for a stable fracture or surgical reconstruction for a complex injury, our clinic offers comprehensive, evidence-based care to restore your ankle and get you back to your life.

Book an Appointment | Call 972-591-6468