What are the key takeaways?
- Trapeziectomy (bone removal) is the oldest procedure with decades of proven results; joint replacement is newer but offers potential advantages.
- Both have high patient satisfaction (85-95%), but they differ in recovery time, strength, and long-term results.
- Joint replacement may offer faster recovery and better early grip strength, while trapeziectomy has a longer track record and no risk of implant failure.
- The best choice depends on your age, activity level, stage of disease, and personal priorities.
When non surgical treatments stop helping your thumb arthritis, surgery is the next step. But which surgery? The two common options are trapeziectomy and thumb joint replacement. Both work, but they take different approaches. This guide explains the differences to help you talk with your surgeon.
How does each procedure work?
What is trapeziectomy?
A trapeziectomy removes the trapezium, the small bone at the base of your thumb that forms part of the CMC joint (thumb base joint). When the bone is gone, the pain stops. The space left fills with scar tissue over time, which acts as a cushion.
There are several variations:
- Simple trapeziectomy: remove the bone and let the space fill on its own
- Trapeziectomy with LRTI: remove the bone and use a tendon to rebuild a ligament to stabilize the thumb (the most common variation)
- Trapeziectomy with suspension: remove the bone and use sutures, a wire, or a device to hold the thumb height
Research comparing these variations has not shown a clear winner. All have similar long-term results. A landmark Cochrane review found that the extra procedures (LRTI, suspension) do not significantly improve outcomes over simple trapeziectomy alone.
Thumb Joint Replacement (Arthroplasty)
Joint replacement means removing the damaged surfaces of the thumb joint and putting in a prosthetic implant. It is similar to hip or knee replacement but much smaller. Modern CMC implants come in several designs:
- Total joint replacement: both the trapezium and metacarpal surfaces are replaced (ball-and-socket design)
- Hemi-arthroplasty: only the metacarpal side is replaced with a prosthetic head
- Interposition implant: a spacer, often pyrocarbon, is placed between the bones after partial bone removal
For a detailed look at available implants, visit our implant directory.
How do trapeziectomy and joint replacement compare side by side?
| Factor | Trapeziectomy | Joint Replacement |
|---|---|---|
| Track record | 40+ years of published results | 10-15 years for modern designs |
| Surgery time | 45-90 minutes | 45-75 minutes |
| Immobilization | 4-6 weeks in cast | 2-4 weeks in splint (often shorter) |
| Return to daily tasks | 8-12 weeks | 6-8 weeks |
| Full recovery | 6-12 months | 3-6 months |
| Pain relief | Excellent, eliminates bone-on-bone pain | Excellent, replaces damaged surfaces |
| Grip strength | Reaches 70-85% of normal at 12 months | May reach 80-90% of normal at 6 months |
| Range of motion | Good, some loss of pinch force | Good to excellent, may preserve more motion |
| Long-term durability | Permanent, no implant to fail | 90-95% survival at 5 years; long-term data limited |
| Revision rate | Very low (2-5%) | 3-10% depending on implant type |
| If it fails | Rare; can be managed with additional procedures | Can be converted to trapeziectomy |
| Satisfaction rate | 85-95% | 80-92% |
Who should consider each?
When is trapeziectomy better?
- Are under 50 and very active with your hands (no risk of implant wear)
- Have Eaton stage IV disease (pantrapezial arthritis) affecting multiple joints around the trapezium
- Do heavy manual work
- Prefer a procedure with a longer track record and no implant related concerns
- Have significant bone loss or deformity
When is joint replacement better?
- Are between 50-75 with moderate activity demands
- Have Eaton stage II-III disease with isolated CMC arthritis
- Want potentially faster recovery
- Value preserving maximum grip and pinch strength
- Have had both thumbs affected and need quicker return to hand function
What should I ask my surgeon?
Bring these questions to your consultation:
- Which procedure do you recommend for my specific situation, and why?
- How many of each procedure do you perform per year? (Higher surgical volume generally leads to better outcomes.)
- What is your personal complication rate for each procedure?
- If I choose a joint replacement, which implant do you use and what is its published survival rate?
- What happens if the implant fails, what are the revision options?
- What does the rehabilitation look like, and will you refer me to a hand therapist?
- Based on my activity level and age, which procedure gives me the best long-term result?
The Bottom Line
There is no single “best” surgery for every patient. Both trapeziectomy and joint replacement are well-established procedures with high satisfaction rates. The right choice depends on your age, activity demands, the stage of your arthritis, and your surgeon’s experience.
What the evidence consistently shows is that both procedures provide excellent pain relief and improved function compared to living with untreated severe arthritis. The most important factors for a good outcome are having an experienced surgeon and completing your rehabilitation program.
For more details on specific implants, visit our implant directory. To learn about recovery in detail, see our trapeziectomy recovery timeline. For a broader overview of all surgical options, explore our surgical treatment guide.
Medical Disclaimer
This article was prepared by the Hand Health Medical Advisory Board for educational purposes only. It is based on current medical literature and clinical guidelines, but it does not replace professional medical advice. Every patient’s situation is unique. Please consult your doctor or hand specialist before making any decisions about your treatment. If you are experiencing severe or worsening symptoms, seek medical attention promptly.