Did your bone not set properly after breaking it? (Malunion & Nonunion Fractures)

Oh, breaking a bone is something you don't even want to think about, right? But it can happen in an accident, a fall from a height, or even a car accident. Most of the time, with the treatment provided by doctors, like applying bandages and maybe a plaster, the broken bone pieces can be put back together nicely. But sometimes, these things don't happen as easily as you think. What happens if they don't fit together properly, or if they don't fit together at all? Today, we're going to talk about two such conditions: Malunion and Nonunion .

What are Malunion and Nonunion?

Simply put, this refers to cases where a bone does not heal properly after a fracture.

• Malunion is when broken bones are fused together, but in the wrong way, in the wrong position . Like two broken pieces of plate being glued together incorrectly. The bones can be pulled, bent, or shortened.
• Nonunion is when broken bones have not healed at all, even after a long time. It's like two broken pieces of wood that just won't fit together.

In this way, if a bone is misaligned, or if it is completely misaligned, it can have a major impact on the stability and function of our body's skeleton. Imagine how difficult it would be to walk if a bone in a leg was misaligned.

Most of the time, fractures heal well with proper treatment. If they don't, there must be a reason. It could be a mechanical problem - that is, the broken pieces didn't fit together properly during healing. Or it could be a biological problem - that is, your body doesn't have enough resources to heal a bone. Doctors take all of these factors into account when treating these conditions.

What are the main types of nonunion?

Your doctor may classify your nonunion as ``Hypertrophic'', ``Atrophic'', or ``Oligotrophic''. This classification is based on evidence of what is causing the bone to not heal.

• Hypertrophic nonunion: This is when new bone is forming, but the ends of the broken bone pieces are not properly joined together. In other words, your bone has all the biological components (e.g., blood supply, cells) that are needed to heal, but the bone pieces are not properly held together during healing. Imagine having all the materials needed to build a house, but the walls are not properly fastened.
• Atrophic nonunion:In this case, there is no visible new bone formation, and the bone does not receive a good blood supply. This suggests that the bone is not healing for biological reasons. Just like a plant withers without water and nutrition. Sometimes, if there is an infection inside the bone (septic nonunion), the blood supply can also be disrupted.
• Oligotrophic nonunion: In this case, some new bone is formed, but it is not complete. The bone fragments are not in the correct position. Perhaps the bone fragments were not set properly in the first place, or they were later fused. There may be problems with the stability of the bone fragments and biological factors.

What are the symptoms of a malunion?

When a bone is misaligned (malunion), you may see things like this:

• Your bones look stretched or bent.
• It looks like the bone is twisted .
• The bone looks shorter than it was before.

When using a bone that is misaligned in this way, you may experience the following symptoms:

• It hurts where the bone is.
• There is swelling .
• Limping when walking (if it's a leg).

All the bones in our body are connected to each other. So when a bone is weak in one place, it can put extra weight and pressure on other bones. Therefore, when you use the injured bone, you can feel pain in other parts of the body.

Imagine, if a nearby nerve is pinched or pulled due to misaligned bone fragments, these are the nerve-related symptoms you may experience:

• Tingling, a feeling like ants are running around (paresthesia).
• The muscles in the injured area become weak and atrophy.
• Nerve pain (neuropathy) is occurring.

What are the symptoms of a nonunion?

When a bone does not come together (nonunion), you may see symptoms like:

• There is a deep, constant pain at the broken spot.
• There is still a weakness in that area, a feeling of being unable to move properly .
• From the outside, you can see a difference , maybe like a knot or a gap.

Sometimes, if there is an infection in the bone, it may be accompanied by or without these symptoms:

• Swelling
• Fever
• I'm getting cold.

Why do these malunions and nonunions occur?

When a bone breaks, there are many reasons why it may not heal properly or may not heal at all. Let's look at some of the main ones:

• How it was broken, how badly:For example, bones that are twisted (spiral fractures) or broken into many pieces (comminuted fractures) are less likely to heal properly. Also, if you have severe injuries (traumatic injuries) that affect the blood supply to the bone, it will affect healing. Because blood supply is essential for the bone to be alive and heal.
• How quickly and how well you get treatment: If you don't see a doctor as soon as you break a bone, it can start to heal incorrectly. Sometimes, even if the pieces of bone are set properly, they can still become dislocated. This is more likely to happen if treatment is delayed or if the treatment is inadequate.
• Resting and protecting yourself during the healing process: It is very important to keep a bone in place and in the correct position while it is healing. Some people take longer than usual for a bone to heal. In such cases, problems can arise if the doctor removes the cast too early or if you start using the bone too soon.
• Your overall health and ability to heal: When a bone heals slowly, it is more likely to become malunion or nonunion. People with aging , nutritional deficiencies (especially calcium and vitamin D), or metabolic diseases such as diabetes mellitus and thyroid disease can slow or even prevent bone healing. It is also important to remember that tobacco and nicotine use can also weaken bones and delay healing.

How do doctors diagnose these conditions?

When diagnosing a condition like this, the doctor will first ask you about how the injury occurred and any other medical conditions you may have. Then, he or she will do a physical examination of your leg. He or she will look at things like what changes you can see on the outside and how it feels when you move it. Depending on where the fracture is, they may want to watch how you walk or measure the length of the leg.

Then, of course, pictures of the bone are taken (`imaging`). This can use tests such as X-rays , a CT scan , or an MRI .

The doctor will check to see if the bone has healed in an abnormal, incorrect position for the body. If so, he will determine that it is a malunion.

If the bone has not healed for a long time, or if it has not healed completely, it is called a `delayed union` or nonunion. The time it takes for a bone to heal can vary depending on the nature of the injury, the type of bone that is broken, and your overall health. Typically, it can take six, nine, or twelve months for a bone to heal without healing.

Can these malunions and nonunions be created?

Not every malunion or nonunion needs to be repaired. It depends on what bone is broken, how much you use the bone, and how much the condition affects your daily life. But sometimes, a bone that hasn't healed properly can make it difficult to walk, cause pain, or cause other complications. In that case, surgery may be needed to repair it. Your doctor will first try nonsurgical treatments and then suggest surgery if they don't work.

Treatment for Malunion

Non-surgical treatments:

• Bracing: Sometimes a special brace can be used to help keep the bone in a better position.
• Orthotics: A specially designed shoe insert can help compensate for a leg length discrepancy.
• Physical therapy: Specific exercises can strengthen the affected muscles and reduce the load on the bones.
• Pain relievers: For occasional pain, you can use common pain relievers such as NSAIDs.

Treatment by surgery:

• Osteotomy: In this, a bone surgeon cuts out the misaligned bone and sets it back into place.
• Limb lengthening surgery: If an arm or leg is shortened, the surgeon can use a special device to lengthen it.

Treatment for Nonunion

Non-surgical treatments:

• Medical therapy: You may need to be treated for another condition (e.g. diabetes), an infection, or a nutritional deficiency.
• Orthoses: A brace, splint, or cast can help keep the bone immobile and help it heal.
• Bone stimulator: These use either ultrasonic or electromagnetic waves to stimulate bone healing.
• Biologic injections: Injections of stem cells or platelet-rich plasma can stimulate bone healing and growth.

Treatment by surgery:

• Debridement: In this, the orthopedic surgeon removes dead tissue from the bone.
• Vascular surgery: A vascular surgeon can perform surgery on your blood vessels to restore blood flow to your heart.
• Bone grafting:In this, the orthopedic surgeon takes a piece of bone from another part of your body, or from a donor bone, and transplants it into the missing part. This transplanted bone gives a good start to new bone growth.
• Open reduction and internal fixation: In this, the orthopedic surgeon realigns the bone fragments and fixes them together with surgical screws and plates or nails.

How is the situation after treatment?

Both non-surgical and surgical treatments have a high success rate in treating malunions and nonunions. However, recovery and rehabilitation take time. You may need to use a cane or walker until you recover. You may also need to undergo physical therapy for a while. Sometimes, if the bones cannot be properly aligned, or if the doctor cannot control the underlying biological factors, the treatment may fail.

Breaking a bone can happen to anyone. It's not always clear whether you have a broken bone or not. But if you think you may have one, it's best to see a doctor as soon as possible. Because fractures heal better when they are treated quickly and properly. Your doctor will examine your injury and determine what may be preventing it from healing. He or she will then advise you on what you can do to help it heal properly, rather than causing a malunion or nonunion.

The most important things to remember (Take-Home Message)

Don't panic if you break a bone. But don't take it lightly either. See a doctor immediately and get proper treatment. Follow the doctor's instructions exactly. If you are given a cast, keep it on until he tells you to take it off. If he tells you to exercise, do it properly. Eat a balanced diet, especially foods rich in calcium and vitamin D. If you are a smoker, quitting is a great help in healing. Because healthy bones are essential for a healthy life!

` Bone fracture, malunion, nonunion, bone healing, bone surgery, bone treatment, broken bone