Treatment for Rhizarthrosis

Procedure

For mild symptoms of rhizarthrosis, the thumb can be immobilized with an appropriate splint and treated with anti-inflammatory pain medication. This can help reduce swelling and pain. In addition, cortisone injections can be administered into the joint. If there is painful instability of the thumb saddle joint that would eventually lead to osteoarthritis of the joint, joint stabilization through ligament reconstruction using a tendon may be performed as a preventive procedure under certain circumstances.

Patients with chronic pain who do not respond to the conservative treatment options mentioned require surgical treatment. Various surgical techniques have been developed for this condition. In the most commonly performed surgery, the trapezium bone (os trapezium)—which, together with the metacarpal bone, forms the saddle joint—is removed. To prevent the thumb from slipping toward the wrist, it is flexibly secured in its original position using a wrist tendon strap, thereby preserving mobility. In addition to this procedure, there are other surgical options that may be considered, depending on the stage of the disease. Your hand surgeon will advise you on the best option for you.

Aftercare

After surgery, the limb is immobilized in a cast for two weeks. Next, a removable splint is fitted, which must be worn during the day for another two to four weeks. At the same time, hand therapy begins with mobilization of the thumb. A splint should be worn at night for about two to four months after the surgery to help stabilize the thumb’s position. Full strength is achieved after four to six months.