Abstract
We present the results of a prospective study of 31 thumbs in 30 patients affected by primary osteoarthritis at the thumb carpometacarpal (CMC1) joint who were treated with denervation of the involved joint. For every operated hand, the Kapandji score, key-pinch strength, grip strength and pain on a visual analogue scale were evaluated preoperatively and postoperatively at 2 weeks, 6 weeks, 3 months, 6 months and 1 year. The patients’ satisfaction was determined. The Kapandji score and key-pinch strength improved significantly in all patients. Grip strength improved significantly in 10 hands. Pain was reduced in all cases. Nevertheless, 6 patients were dissatisfied with the operation. Of these 6 patients, 4 had stage IV arthritis in the TMC and scaphotrapeziotrapezoid joints of the thumb. Thumb CMC denervation appears to reduce pain at 1 year with an overall improvement in key-pinch strength. However, patients with stage IV CMC arthritis were not satisfied with the outcome of the procedure.
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