Types of Ankle Fractures & Injuries

This is my ankle— the first time out of a cast— two weeks post op after an ORIF surgery for a bimalleolar fracture and ruptured tendon.

You broke your ankle. Unfortunately, that’s the short version.

FROM THE TRENCHES

One of the first things you discover in an ankle-fracture community is just how many versions of a “broken ankle” there are.

You’ve got your single clean break, all the way through to fractures on both sides of the ankle, plus dislocations, tendon tears and a slew of other fun injuries, often piled on top of each other. They may have enormously varying treatments, restrictions and recovery timelines.

But the comparisons are inevitable:

You're walking already?

You're still non-weightbearing?

You didn't need surgery?

You have how many screws?

Those comparisons can be useful. It can be reassuring to hear from people who have been through something similar, and they can give you an idea of what recovery may involve. But it can be scary, too, wondering if you’re going to be as bad off as the fracture friend who’s crying in a Facebook post.

Just remember the important word is similar.

Someone else's experience can help you know what questions to ask, but it can't give you your own recovery schedule. Use other people's recovery stories for information, encouragement and companionship—not as a stopwatch.

Types of Ankle Fractures

This chapter isn't intended to cover every possible ankle fracture or injury. There are simply too many variations, and your imaging and medical team are the best sources for the specifics of your injury. Instead, consider this a guide to some of the terms you're likely to encounter—and to why the details of your particular injury matter.

Stable, Unstable and Stress Fractures

One of the most important distinctions isn't simply which bone broke, but whether the ankle remains stable.

With a stable fracture, the broken bone remains in acceptable alignment and the ankle joint remains stable. These fractures can often be treated without surgery, using a cast, boot or brace while the bone heals.

An unstable fracture involves loss of normal alignment or stability of the ankle joint. Surgery may be needed to restore and maintain the position of the bones and joint.

Stress fractures are different again. Instead of resulting from one dramatic accident, they are tiny cracks in bone associated with repetitive stress. Pain often develops gradually and worsens with activity.

This is one reason comparing treatment with somebody else's can be so misleading. A person with a stable fracture may be walking in a boot while another person with what sounds like a similar “broken ankle” may have undergone surgery and been told not to put weight on the leg.

One, Two or Three Malleoli

One little, two little, three little malleoli…

You may hear your fracture described according to how many malleoli are involved. The three bony areas around the ankle are the malleoli:

  • The lateral malleolus is the end of the fibula on the outside of the ankle.

  • The medial malleolus is part of the tibia on the inside of the ankle.

  • The posterior malleolus is at the back of the tibia.

A fracture involving one malleolus is generally called unimalleolar. A bimalleolar fracture involves two, and a trimalleolar fracture involves all three—the medial, lateral and posterior malleoli.

Generally, injuries involving more of the ankle can be more complex, particularly when the ankle is unstable or the bones have moved out of their normal positions. Bimalleolar and trimalleolar fractures frequently require surgical repair with plates and screws, followed by a period of immobilization and rehabilitation.

But even those labels don't tell the whole story. Two trimalleolar fractures aren't necessarily identical. The size and position of the fractures, whether the pieces have shifted, the condition of the joint and whether other structures were damaged can all affect treatment and recovery.

Displaced and Nondisplaced Fractures

Another term you're likely to encounter is displacement.

A nondisplaced fracture means the bone has broken but the pieces remain in or close to their normal position.

With a displaced fracture, the broken pieces have moved out of alignment.

That distinction can affect whether surgery is recommended, but it is only one part of the decision. Your surgeon considers the entire injury.

Beyond the Bone

A bad twist, fall or impact can damage ligaments, tendons and other structures around the ankle, causing considerable pain, swelling, bruising and difficulty bearing weight—symptoms that can look a lot like a fracture. Severe sprains can also damage ligaments enough to cause long-term instability if they aren't properly treated.

A syndesmotic injury, often called a high ankle sprain, affects the ligaments that connect the tibia and fibula above the ankle joint. Mild injuries may be treated without surgery, while severe ones may require surgical stabilization.

Tendon injuries can occur as well. The peroneal tendons, which run along the outside of the ankle, help stabilize the joint during walking and other activity. They can become inflamed, torn or displaced. The Achilles tendon, which connects the calf muscles to the heel, can also be partially or completely torn.

Sometimes these injuries occur by themselves. Sometimes they accompany a fracture.

That can become particularly important later in recovery. A healed bone doesn't necessarily mean that every structure injured in the original accident has recovered at the same rate.

Ankle injuries overlap enough that it's often impossible to know exactly what's wrong without a medical examination and, when appropriate, imaging.

MY TAKE ON IT

Years ago—in 1998—I had another serious ankle injury, one that also required surgery and a prolonged non-weightbearing period. (Yes, it also involved falling off of a horse. I realize there may be a trend here.)

Immediately after my injury, I went to the emergency room where they took an X-ray and told me it wasn’t fractured. I was thrilled to hear that, as I assumed since it was “just a severe sprain” that I would quickly be back in action.

Yet I was completely unable to stand on it and the pain was off the charts. And after I “healed,” my ankle would often pop in an agonizing way. It became clear that it wasn’t going to go away on its own.

It turned out that my peroneal tendon was not only subluxating—the pop I felt—over the ankle bone (the lateral malleolus), but that it was also ripped in two pieces and living on both sides of the bone.

A severe soft tissue injury like the one I had can be more debilitating and harder to heal than a simple, nondisplaced bone fracture. Bone healing for an uncomplicated fracture is often measured in weeks; recovery from a severe soft-tissue injury may take months and can still result in a permanent loss of full mobility or strength.

WORTH KNOWING

If you have access to your X-ray or CT report, operative report or surgeon's notes, it can help you understand exactly what you injured and what was repaired.

You don't need to become an orthopedic expert. You just need enough information to understand your ankle.

ASK YOUR SURGEON

If you're not completely sure what happened to your ankle, ask. Useful questions include:

  • Exactly which bone or bones did I break?

  • Was my fracture displaced or nondisplaced?

  • Was my ankle considered stable or unstable?

  • Was the ankle joint dislocated or out of alignment?

  • Did I injure the syndesmosis or other ligaments?

  • Were any tendons damaged?

  • Was there other damage inside the joint?

  • If I had surgery, what exactly was repaired?

  • Is there anything about my particular injury that could make recovery longer or more complicated?

  • Are there symptoms later in recovery that you would want me to report?

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Recovery Tips After an Ankle Fracture or Surgery