Carpometacarpal (CMC) joint arthroplasty is a surgery used to treat ... which connects the trapezium to the metacarpal of the thumb. CMC joint anthroplasty helps reduce pain and makes it easier ...

Subjectively, 40 patients rated their arthroplasty results as good to ... of the tip of the thumb to the palmar aspect of the fifth metacarpal head was accomplished after 44 of the arthroplasties.