What is Thumb CMC?
The thumb CMC is a joint at the base of the thumb that is called the carpometacarpal joint. When a patient is developing arthritis in their thumb it causes pain, swelling, decreased strength, and range of motion due to affecting this particular joint. Other symptoms associated with arthritis in the thumb include:
- An enlarged or bony appearance of the joint at the thumb’s base
- Tenderness at the base of the thumb
- Decreased strength when pinching or gripping objects
- Decreased range of motion
- Persistent swelling, stiffness, or pain at the base of the thumb
If these symptoms are present, you should make an appointment with your doctor to have your thumb evaluated.
There are risk factors that have been identified for developing arthritis in the thumb, including:
- 40 years of age or older
- Being of the female sex
- Injuries to the thumb joint, such as fractures and sprains
- Hereditary conditions, such as malformed joints or joint ligament laxity
- Rheumatoid arthritis or other diseases that change the normal structure and function of cartilage
- Activities and jobs that place high amounts of stress on the thumb joint.
Thumb Arthroplasty Surgery
Prior to surgery, your doctor will instruct you on what medications you can and cannot take and may perform some basic screening tests to ensure you’re able to go through with the procedure. The surgery can be performed as an outpatient procedure.
The surgeon will first administer general or regional anesthesia before making an incision over the thumb joint. From there they will remove part or all of your wrist and thumb bone. Using cartilage, a tendon is taken from your forearm, or an artificial implant, the surgeon will reconstruct your joint and then close the incision with stitches before bandaging it.
Patient Recovery and Care
After the surgery has been performed and the anesthesia has worn off, you will be fitted with a splint that should not be removed. When showering or bathing, your thumb should be covered in plastic so it does not get wet. While recovering at home, your doctor may recommend that you move your fingers regularly and keep your hand elevated as much as possible for the next few weeks.
About 14 days post-operation, your surgeon will remove the stitches and your thumb will be placed in a cast and a pin. Following the cast and pin removal, you’ll receive a custom splint and begin hand therapy to regain motion. On average, strength in the thumb begins to return around 2 months after surgery and therapy.
At Proliance Puget Sound Orthopaedics, we provide best-in-class orthopedic care to our community with compassion, caring, and dedicated expertise for thumb arthroplasty. If you’re suffering from any of the symptoms listed previously or need treatment for joint pain, we encourage you to call (253) 830 – 5200 or request an appointment online to see one of our physicians.