Carpometacarpal (CMC) joint arthroplasty is a surgery used to treat thumb arthritis when other treatments fail. The procedure involves removing the trapezium, a small wrist bone that supports the ...

For people who don't find relief with medication or braces, Cohen recommends carpometacarpal arthroplasty, or CMC surgery. "One of the arthritic bones, the bone that the thumb connects to in the ...