Overview
Thumb CMC arthroplasty relieves pain at the base of the thumb by removing arthritic bone and reconstructing the joint.

Indications
Severe basal thumb arthritis with pain despite conservative care.

Procedure overview
The trapezium bone is removed and soft‑tissue reconstruction stabilizes the thumb.

Recovery
Splinting and hand therapy; strength returns over months.

Risks and complications
Weakness, persistent pain, or instability.

Alternatives
Splinting, injections, or arthrodesis.