If you have pain at the base of your thumb, you may have heard about surgery to replace the joint. But does it really work? And what happens after the surgery?
A team of doctors studied twenty people who had a special thumb joint replacement called the De La Caffiniere prosthesis. These surgeries happened between 1980 and 1990. The doctors wanted to see how well the new joint worked over time.
Here are three key things they found:
- Seven out of ten people had good results after the surgery.
- Some people had stiffness in their thumb after surgery.
- The prosthesis worked best for people who did not work with their hands for a living.
Key Findings at a Glance
- Research shows that 70% of patients had good results five years after thumb joint replacement surgery.
- Some patients developed stiffness due to new bone growth around the joint after surgery.
- 20% of patients had signs on X-rays that did not cause any pain or problems.
- According to this study, the prosthesis works best for people who do not do manual labor or handicrafts.
- The surgery is helpful for isolated thumb arthritis at the base of the thumb joint.
What is rhizarthrosis and why does it hurt?
You may be wondering what rhizarthrosis even means. Let me explain.
This condition makes it hard to do simple things. Opening jars becomes painful. Writing can hurt. Even turning a key may feel difficult.
Many people live with this pain for years. They try splints, medicine, and exercises. But sometimes the pain gets too bad. That is when surgery may help.
What did the study look at?
The doctors studied twenty people who had their thumb joint replaced. They used a special prosthesis, which is an artificial joint made of metal and plastic.
Here is where it gets interesting. The doctors did not just check on patients right after surgery. They followed them for an average of five years. This gave them time to see how the new joint held up over the long term.
They checked three main things:
- How well the thumb could move
- How strong the hand was
- What the X-rays showed
Let us look closer at what they discovered.
What were the results?
According to this study, 70% of patients had good results. That means seven out of every ten people felt better after surgery. Their pain went down. They could use their thumb more easily.
But the study did not stop there. The doctors wanted to understand what happened to the other three out of ten people.
They measured how much each thumb could move. They tested how strong each hand was. They took X-rays to see how the artificial joint looked inside the body.
This careful tracking helped them find patterns. Some of these patterns had not been seen before in other studies of this prosthesis.
What problems can happen?
Research shows that two main problems can happen after this surgery. Understanding these problems helps you know what to watch for.
Problem one: Stiffness from new bone growth
Some patients developed stiffness in their thumb joint after surgery. This happened because new bone grew around the joint. Doctors call this ossification, which means bone formation.
The doctors noted that this problem had been rarely studied before for this type of prosthesis. They found that when stiffness happened, the good results from surgery decreased. The more stiff the thumb became, the less helpful the surgery was.
Problem two: Lines on X-rays
The second problem showed up on X-rays. Twenty percent of patients had special lines around their prosthesis. Doctors call these radiolucent lines, which means clear or see through areas on the X-ray.
Here is the interesting part. These lines did not cause pain. Patients with these lines felt fine. They did not know the lines were there until doctors took X-rays.
The doctors found different causes for these lines than what other studies had reported. They did not give all the details, but they noted the difference.
Who is this surgery best for?
The doctors were clear about who should get this surgery. It works best for people who have arthritis in just the one thumb joint. The arthritis should not have spread to other joints in the hand.
You may be wondering why this matters. The prosthesis is designed to replace one specific joint. If you have arthritis in many joints, replacing just one may not solve all your problems.
The doctors also said something important about work. They said this surgery is best for people who are not subjected to handicrafts. This means people who do not work with their hands for a living.
If you do heavy manual work, the artificial joint may wear out faster. If you do detailed handwork or crafts all day, the joint may not hold up as well.
Why do doctors still recommend this surgery?
Even with the risks, the doctors said the prosthesis is globally useful in the majority of cases. This means that when you add up all the good and bad, most patients end up better off.
The doctors themselves remain loyal to this surgery. They still offer it to the right patients. This tells us that despite the problems, the benefits are real for many people.
About This Site: We simplify medical science for people with thumb pain and rhizarthrosis. Every article is based only on published scientific research. We read the studies and translate them into plain language you can understand. If you found this helpful, explore more content on our site to learn about your treatment options.
Frequently Asked Questions
How long does a thumb joint replacement last?
According to this study, doctors followed patients for an average of five years after surgery. Most patients still had good results at that time. The study does not tell us how much longer the prosthesis might last beyond five years.
Will I get full movement back in my thumb?
Research shows that some patients develop stiffness after surgery due to new bone growth. The amount of movement you get back depends partly on whether this happens to you. Most patients can move their thumb better than before surgery, but full movement is not guaranteed.
Can I still work with my hands after this surgery?
Studies indicate that this surgery works best for people who do not do manual labor or handicrafts for a living. If your job requires heavy hand use, talk with your doctor about whether this surgery is right for you. The artificial joint may not hold up as well under constant heavy use.
What if the X-rays show lines around my prosthesis?
According to this study, 20% of patients had radiolucent lines on X-rays, but these lines did not cause symptoms. If your doctor sees these lines but you feel fine, it may not be a problem. Your doctor will watch the lines over time to make sure they do not get worse.
Conclusion
Thumb joint replacement with the De La Caffiniere prosthesis can help many people with rhizarthrosis. Research shows that seven out of ten patients had good results five years after surgery.
But this surgery is not perfect. Some people develop stiffness. Some have lines on X-rays. The surgery works best for people who have arthritis in just one thumb joint and who do not do heavy hand work.
If you have thumb pain that will not go away, talk with your doctor. Ask if you might be a good candidate for this surgery. Share what kind of work you do with your hands. Ask about the risks and benefits for your specific situation.
Remember, you are not alone in dealing with thumb pain. Many people have walked this path before you. With the right information and the right doctor, you can make the choice that is best for you.
Disclaimer
This article is for informational purposes only. It is not medical advice. It does not replace a consultation with a qualified healthcare provider. Always talk to your doctor about your specific condition and treatment options. Every person is different, and what works for one patient may not work for another.
Article Citation
Study by: Nonnenmacher, J.; Graftiaux, A. G. (1994)
Full citation: Ann Chir Main Memb Super
Read the original study: https://doi.org/10.1016/s0753-9053(05)80354-0