Can a Thumb Injury Lead to Arthritis If Not Treated Correctly?

If you have thumb pain or have been told you have rhizarthrosis, you may wonder how injuries can affect your thumb joint. Today we look at a real case that shows what can happen when the thumb joint is dislocated and how doctors treated it.

Here are three key points you will learn:

What happens when the thumb joint pops out of place
Why quick treatment matters so much
How doctors fix this injury to prevent future arthritis

Key Findings at a Glance

Pure dislocation of the trapezio-metacarpal joint is very rare and happens when the thumb joint pops completely out of place
According to this study, if this injury is not treated properly, it leads to instability that causes rhizarthrosis, which is arthritis at the base of the thumb
Research shows that quick treatment within one hour can lead to excellent results when doctors use special pins to hold the joint in place
The patient in this case had good thumb function at 14 months after surgery, matching the healthy hand

What Happened in This Case?

According to this study, a 30 year old man hurt his right thumb in a motorbike accident. He went to the hospital emergency room just one hour after the injury happened.

The doctors found that his thumb joint had popped completely out of place. This is what doctors call a dislocation. When a joint dislocates, the bones that normally touch and work together have moved apart.

You may be wondering why this matters.

This type of injury is very rare. Most people who hurt their thumb have other types of injuries. But when this specific joint dislocates, it needs special attention right away.

What Is the Trapezio-Metacarpal Joint?

Let us look closer at what this joint actually is.

What is the trapezio-metacarpal joint? This is the joint at the very base of your thumb where your thumb connects to your wrist. One bone is called the trapezium, which is part of your wrist. The other bone is the metacarpal, which is the long bone in your thumb. Where these two bones meet and move is the joint.

This joint is incredibly important. It lets you move your thumb in many directions. You use it every time you pinch, grip, or pick something up.

Research shows that when this joint gets injured and not treated well, it can become unstable. That means the bones do not stay in the right position when you use your thumb.

Why Does This Injury Matter for Thumb Arthritis?

Here is where it gets interesting.

According to this study, if a dislocation at this joint is not treated or is treated poorly, it causes instability. When the joint is unstable, the bones rub together in ways they should not.

Over time, this rubbing wears away the smooth coating on the bones. This wearing away leads to rhizarthrosis.

What is rhizarthrosis? This is the medical name for arthritis at the base of the thumb. The joint becomes painful, stiff, and swollen. It makes everyday tasks like opening jars or turning keys very hard.

The researchers explain that this arthritis happens inevitably when the joint stays unstable. That means it will definitely happen if the injury is not fixed properly.

This is why treating the dislocation quickly and correctly is so important.

How Did Doctors Treat This Injury?

The man in this case went to the operating theatre for treatment. The doctors used two steps to fix his thumb.

First, they pushed the bones back into their correct positions. This is called reduction. They did this from the outside using their hands. This is what the doctors call an external manoeuvre.

Second, they needed to keep the bones in the right place while they healed. To do this, they used a special pin.

What is an ISELIN-type intermetacarpal pin? This is a thin metal rod that doctors insert between two bones to hold them still. The pin goes from one thumb bone to another bone in the hand. It keeps everything stable so the joint can heal in the right position.

This pin acts like a temporary support. It stops the thumb from moving too much while the damaged tissues around the joint heal and become strong again.

What Happened After Surgery?

The doctors followed the patient for 14 months after his surgery. This is what doctors call a follow up visit. They checked how well his thumb was working.

According to this study, the patient had a good functional outcome. This means his thumb worked well for everyday activities.

The researchers compared his injured thumb to his other healthy hand. The results were similar. His thumb could move, grip, and pinch almost as well as before the injury.

This shows that when doctors treat this rare injury quickly and properly, patients can recover very well.

About This Site

We simplify medical science for people dealing with thumb pain and rhizarthrosis. Every article on this site uses only published scientific research. We read the studies and explain them in plain language so you can understand what doctors and researchers have learned. Feel free to explore more articles to learn about your condition and treatment options.

Common Questions

What causes a thumb joint to dislocate?

According to this study, the mechanism is generally indirect. This means the force that causes the injury does not hit the thumb directly. Instead, the thumb gets pushed or twisted in an awkward way during an accident, like falling or crashing on a motorbike.

Why is this injury so rare?

Research shows that pure dislocation of this specific thumb joint does not happen often. Most thumb injuries involve breaks in the bone or damage to other joints. The trapezio-metacarpal joint is strong and protected, so it takes a very specific force to make it dislocate completely without breaking bones.

Can this injury heal without surgery?

According to this study, doctors used surgery to make sure the joint stayed in the correct position. The researchers explain that proper treatment is essential to prevent instability. While the abstract does not say if non surgical treatment works, it makes clear that inadequate treatment leads to arthritis.

How long does recovery take?

The patient in this case was followed for 14 months and had good thumb function by that time. The exact recovery timeline varies for each person. The important point is that with proper treatment, good recovery is possible.

What This Means for You

If you have thumb pain or rhizarthrosis, understanding how injuries can lead to arthritis is important. This case report shows that even rare injuries need quick and proper treatment.

When the joint at the base of the thumb is damaged, it can become unstable. That instability wears away the joint and causes the arthritis pain you may be feeling now.

If you ever hurt your thumb badly, getting medical attention quickly matters. The sooner doctors can check and treat the injury, the better your chances of avoiding long term problems.

Talk to your doctor if you have thumb pain that does not go away. They can examine your joint and help you understand what treatment might help.

Important Note

This article shares information from medical research. It is not medical advice. Every person is different. Always talk to your own doctor about your thumb pain. Your doctor can examine you and suggest the best treatment for your specific situation.

Scientific Source

Study Reference:
Hadad, O., Jadib, I., Isamil, H., Elkassimi, C.E., Rafaoui, A., Rahmi, M., & Rafai, M. (2024). Acute pure Trapezio-metacarpal joint dislocation: A rare case report and literature review. World Journal of Advanced Research and Reviews.
https://doi.org/10.30574/wjarr.2024.22.3.1792

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