Thumb arthritis is most common in the thumb carpometacarpal joint, between the base of the thumb metacarpal and a wrist bone the trapezium. Thumb arthritis is sometimes referred to as basal joint arthritis.
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Latest Park Ridge. Arthritis of the base of the thumb. The CMC joint, which is between the thumb metacarpal and a small bone called the trapezium, allows the swiveling, pivoting and pinching needed to grip things in your hand. Share on: Facebook Twitter. When osteoarthritis causes the cartilage to wear away, the shock and impact absorbing function of the cartilage is lost and the bones can rub against each other, causing stiffness and pain.
Common causes of thumb pain
Splints and Braces There are a number of different braces and splints that support the thumb, which places the joint in a resting position and provides significant pain relief. The sheaths are tubular structures that surround part of the fingers. If you have an excessive wear of the thumb joint over a long period of time, it can lead to a break down of your joint cartilage leading to inflammation and potentially causing osteoarthritis of this joint.