Anatomy. The trapezium bone is a small oblong bone that plays a role in the stability of the carpal tunnel and the thumb joint. Its shape and size, as well as its location below the thumb, cause ...

Or, the cartilage pad between the wrist joint (trapezium) and the joint at the base of the thumb (first carpometacarpal) can wear out. This can cause stiffness, pain, ...

Basal joint arthritis occurs when the cartilage in the bones of the thumb wears away. ... The bones can be cut and repositioned, or one of the bones in your thumb joint (trapezium) can be removed.

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 ...

First CMC osteoarthritis is a common degenerative condition affecting the base of the thumb, often resulting in significant ...