Compare every major thumb CMC joint implant and prosthesis used for rhizarthrosis. This directory includes clinical data, regulatory status, and patient outcomes from published studies.
Total Joint Prostheses (Ball-and-Socket)
These replace both the trapezium and metacarpal surfaces, mimicking the natural joint.
Touch CMC 1 (KeriMedical / Medartis)
Third-generation dual-mobility prosthesis. The most widely implanted CMC prosthesis in Europe.
- FDA Status: PMA approved (July 2025)
- CE Mark: Yes (since 2018)
- Implantations: 150,000+ in Europe
- 5-Year Survival: ~95%
- Material: Cobalt-chromium + polyethylene liner
- Key Feature: Dual-mobility design reduces dislocation risk
- Recovery: Ace bandage only — no cast needed. Early mobilisation.
Ivory (Biomet)
Cementless total joint prosthesis with hydroxyapatite coating for bone ingrowth.
- FDA Status: Not available in US
- CE Mark: Yes
- 5-Year Survival: ~90%
- Material: Titanium + polyethylene
- Key Feature: Hydroxyapatite-coated for biological fixation
Elektra (Small Bone Innovations)
Modular total joint prosthesis with press-fit trapezial component.
- FDA Status: Not available in US
- CE Mark: Yes
- 5-Year Survival: ~85-90%
- Material: Cobalt-chromium + polyethylene
- Key Feature: Modular design allows intraoperative size adjustment
Maïa (Groupe Lépine)
Dual-mobility total joint replacement with anatomical design.
- FDA Status: Not available in US
- CE Mark: Yes
- 5-Year Survival: ~92%
- Material: Cobalt-chromium + polyethylene
- Key Feature: Anatomical cup design matches natural trapezium shape
ARPE (Biomet)
One of the earliest modern CMC prostheses. Established track record.
- FDA Status: Not available in US
- CE Mark: Yes
- 10-Year Survival: ~83%
- Material: Cobalt-chromium
- Key Feature: Longest published follow-up data available
Interposition Implants & Spacers
These are placed between the bones after partial trapezium removal, acting as cushions.
ELiS (Biotech Ortho)
Pyrocarbon interposition implant. Mimics the elastic properties of bone.
- CE Mark: Yes
- Material: Pyrolytic carbon
- Key Feature: Bone-like elastic modulus reduces stress shielding
- Best for: Eaton Stage II-III with intact metacarpal
Silicone Spacers (Various)
First-generation interposition devices. Largely replaced by newer designs.
- Material: Silicone elastomer
- Key Issue: Silicone synovitis (inflammatory reaction) in some patients
- Status: Still used in some centres but declining
How to Choose
| Factor | Total Joint | Interposition |
|---|---|---|
| Best for stage | III-IV | II-III |
| Recovery time | 4-8 weeks | 6-10 weeks |
| Thumb length | Preserved | Some shortening |
| Revision option | Convert to trapeziectomy | Convert to trapeziectomy |
| Grip strength | 70-90% of normal | 60-80% of normal |
Important: The choice of implant depends on many factors including your Eaton stage, bone quality, surgeon experience, and local availability. Discuss options with your hand surgeon. Read our full implant outcomes guide →
Medical Disclaimer: This directory is for educational purposes only. Implant availability varies by country. Always consult your surgeon for personalised recommendations.