Thumb CMC arthroplasty is a treatment option for thumb arthritis, a type of osteoarthritis found at the carpometacarpal CMC joint located at the base of the thumb. The CMC joint gives the thumb a wide range of motion — up, down, and across the palm, as well the ability to pinch. A joint is comprised of two bones, each covered with cartilage hard slippery tissue that serves as a shock absorber to allow smooth movements. Continue reading for more detailed information about thumb CMC arthroplasty. To learn more about the causes and symptoms of thumb CMC arthritis, click the button below:. Thumb CMC arthroplasty involves removing the small wrist bone that is part of the CMC joint and replacing it with a wrist flexor tendon.
Thumb Arthroplasty (Includes Implants) – St. George Surgical Center
Thumb Arthroplasty is surgery to replace part or the entire joint at the base of your thumb. Thumb Arthroplasty is a procedure that is performed on patients with advanced basilar thumb arthritis. The procedure is intended to alleviate pain in the thumb and improve function. Your health care provider will talk to you about how to prepare for surgery.
Background Thumb arthritis at the carpometacarpal CMC joint is one of the most common sites of arthritis, especially in women. Thumb arthroplasty is an effective method of relieving pain and improving function. Materials and Methods Qualitative and quantitative outcomes were assessed clinically and radiographically in 58 patients 66 thumbs with thumb basal joint arthritis limited to the trapeziometacarpal joint, treated with hemiresection arthroplasty of the trapezium, flexor carpi radialis FCR ligament reconstruction, and allograft costochondral interposition graft. Description of Technique The thumb CMC joint arthroplasty is performed using an FCR tendon for ligament reconstruction combined with removal of the distal half of the trapezium, which is replaced with a life preserver-shaped spacer that is carved out of allograft cartilage.
The carpometacarpal joint is where the metacarpal bone of the thumb attaches to the trapezium bone of the wrist. This joint has a very unique shape that permits the thumb to move in multiple directions. Arthritis at the CMC joint may cause changes in the shape of the joint and weakening of its ligamentous supports as well as the formation of bone spurs. Diagnosis is based on history, physical examination and X-Rays. Conservative treatment includes activity modification, splinting, nonsteroidal antiinflammatory medication administration, and steroid injection.