Medically reviewed by Stuart Hershman, MD Carpometacarpal (CMC) joint arthroplasty is a surgery used to treat thumb arthritis when other treatments fail. The procedure involves removing the trapezium, ...

CHICAGO - Pinching, gripping, squeezing, and lifting all sound like simple tasks, but for Marcy Dub, thumb arthritis made ... Cohen recommends carpometacarpal arthroplasty, or CMC surgery.