The FAQ's on Thumb Arthritis
Degenerative arthritis of the thumb is one of the most common types of hand arthritis. It usually strikes at the base of the thumb where it meets the wrist. This joint, known as the carpometacarpal (CMC) joint, is a highly mobile joint that allows motion in all directions. It is also the joint that allows for a strong pinching motion. However, because of its wide range of mobility, the bones that comprise the CMC joint must give up some stability, similar to the shoulder joint. Because of this , the ligaments around the joint are forced to bear most of the burden of stabilizing the thumb during hand use, and if they are unable to do it effectively then the aberrant motion in the joint over time can contribute to arthritis. Diagnosis The bones of the body at the joint surfaces are covered with cartilage, a slippery coating that allows smooth motion at the joints. Arthritis is an inflammation and eventual wearing away of the cartilage, creating rougher surfaces and painful motion. In