Introduction

The carpometacarpal (CMC) joint at the base of the thumb is crucial for many everyday hand movements, from holding a pen to opening jars. When arthritis affects this joint, it can cause pain and make simple tasks frustratingly difficult. For those with severe symptoms, CMC joint replacement surgery can offer relief. This article explores the pros and cons of the procedure, drawing on the latest research and expert insights to help you make an informed choice.

When and Why Is CMC Joint Replacement Considered?

Typically, CMC joint replacement is recommended for people with advanced arthritis who experience ongoing pain, reduced grip strength, and limited thumb movement — especially when non-surgical treatments like splinting, injections, or physiotherapy haven’t helped. Deciding to go ahead with surgery involves a careful look at factors such as your age, lifestyle, and the extent of joint damage. Experts like Professor Paul Lee, working with MSK Doctors, ensure patients receive personalised advice and explore all options before committing to surgery.

The Key Benefits of CMC Joint Replacement

One of the main reasons patients opt for CMC joint replacement is significant pain relief. Many also regain much of their thumb’s strength and movement, which can vastly improve quality of life. Recent studies show that modern implants, like the MAÏA® dual mobility device, lead to good improvements in pain, strength, and function over several years, with no reported dislocations. In fact, implant survival rates are impressive — one study reported a 97% success rate at six years post-operation. Additionally, joint replacement tends to reduce disability better than some other surgical options; “post-operative QuickDASH scores were lower for patients in the joint replacement group, indicating less difficulty performing daily activities.” These results particularly benefit older adults or those who have not found relief from other treatments. The surgery also follows established best practices, including use of bone cement techniques endorsed by British surgical bodies, ensuring safety and reliability.

Risks and Limitations to Keep in Mind

Like all surgeries, CMC joint replacement carries risks. These can include nerve damage leading to numbness, infection, loss of thumb mobility, or implant loosening. For example, in one large series, a handful of patients needed revisions due to symptomatic loosening, while a few others had asymptomatic loosening that did not require further surgery. There were also occasional complications like fractures during surgery. Systematic reviews highlight that joint replacement carries “greater odds of overall complications” and a higher chance of needing revision surgery compared to some other techniques. However, pain levels after surgery are often similar regardless of the method chosen. Because of this, it’s important to have realistic expectations and discuss the possible outcomes thoroughly with your surgeon before deciding.

Exploring Alternatives and Personalising Your Treatment

Not every patient needs surgery straight away. Non-surgical options such as splints to support the thumb, steroid injections for inflammation, and hand therapy exercises can be very effective, especially in earlier stages of arthritis. Experienced teams, including experts like Professor Paul Lee, can guide you through these choices to find what works best for your unique situation. Evidence suggests that while joint replacement may lead to better function and less disability in cases that don’t respond to conservative care, it comes with increased risks of complications and revision. One careful analysis concluded: “Joint replacement treatments may result in better function with less disability… however, they have greater odds of complications and revision surgery.” Ultimately, your doctor will support you in making a decision that matches your health, needs, and lifestyle goals.

Conclusion

CMC joint replacement surgery can dramatically ease pain and restore function in the right candidates, but it isn’t without its challenges. The key to success lies in tailored care, honest discussions about risks and benefits, and expert guidance. If you think surgery might be right for you, seek consultation from seasoned specialists like Professor Paul Lee and the MSK Doctors team — they offer thorough assessments and personalised advice to help you take the best next step.

References

• Dass, D., Yap, R. Y., Edakalathur, J., Cheruvu, M., & Roushdi, I. (2026). Outcomes of MAÏA® dual mobility CMC joint arthroplasty – with short to medium term outcomes. Journal of Hand Surgery (European Volume). https://doi.org/10.1177/17531934251410360
• Raj, S., Clay, R., Ramji, S., Shaunak, R., Dadrewalla, A., Sinha, V., & Shaunak, S. (2021). Trapeziectomy versus joint replacement for first carpometacarpal (CMC 1) joint osteoarthritis: a systematic review and meta-analysis. European Journal of Orthopaedic Surgery & Traumatology, 31, 1237–1250. https://doi.org/10.1007/s00590-021-03070-5
• Raj, S., Clay, R., Ramji, S., Shaunak, R., Dadrewalla, A., Sinha, V., & Shaunak, S. (2021). 660 Trapeziectomy Versus Joint Replacement for First Carpometacarpal (CMC-1) Joint Osteoarthritis: A Systematic Review and Meta-Analysis. British Journal of Surgery, 108(Supplement_7), znab259.1003. https://doi.org/10.1093/bjs/znab259.1003