Which of the Following Is a True Statement About Carpometacarpal

Which of the following is a true statement about carpometacarpal (CMC) arthroplasty of the thumb and postoperative management?

A) For a patient with erosion of the articular surfaces and subluxation of the CMC joint, joint replacement arthroplasty with prosthetic implants is a far more common procedure than trapezial resection/tendon interposition arthroplasty with ligament reconstruction.
B) A longer period of immobilization of the thumb is required after total joint arthroplasty with prosthetic implants than after trapezial resection/tendon interposition arthroplasty with ligament reconstruction.
C) After CMC arthroplasty, the thumb is immobilized in palmar abduction.
D) A priority in a postoperative exercise program is to gain active radial adduction combined with palmar adduction of the thumb (sliding the thumb across the palm) as early as possible.

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