TREATMENT OF THUMB BASAL JOINT ARTHRITIS

BACKGROUND: Osteoarthritis is a common condition which increases as individuals age. Symptomatic arthritis significantly affects hand strength and function, increasing the difficulty in performing daily activities. CMC arthroplasty with conchal cartilage interposition grafting is a new surgical technique. It involves widening of the CMC joint space using an electric bur followed by placement of a conchal cartilage graft within the space to serve as a cushion. Theoretically this replaces the cartilage in the joint and reduces pain. Utilizing the patient's cartilage prevents the necessity for immunosuppressive medication which may be necessary if a cadaver cartilage is used. METHODS: A retrospective study was performed to assess functional outcomes of 174 patients who underwent the CMC arthroplasty with conchal cartilage interposition graft procedure. We used the SRS Health EMR Software to conduct a review on patient data dating from 2010-2021. Preoperatively and postoperatively, patients were assessed through factors of pain severity, and range of motion. Risk factors, job occupations, gender and age were also taken into account. RESULTS: Post-operatively, patients were noted to have significant reduction in pain at the base of the thumb with increased range of motion and obtaining a Kapandji score of nine frequently. Complications following conchal cartilage graft harvest from the ear were also minimal and didn't require repeat procedures. CONCLUSIONS: Overall outcomes of this surgical technique were further assessed through optimal functional outcome measurements derived during occupational therapy post-op. This surgical treatment appears to be a satisfactory solution for the treatment of basal joint osteoarthritis.