Abstract
Opponoplasty using tendon transfer is a useful reconstructive procedure that restores lost thenar muscle function. Tendon transfers, however, require postoperative immobilization periods of up to four weeks before the sutured tendons reach required strength. We developed an opponoplasty procedure using α-TCP (alpha-tricalcium phosphate) cement that does not require postoperative immobilization and was applied to nine hands out of nine cases. The procedure is performed under local anesthesia without a pneumatic tourniquet and on an outpatient basis. In this procedure, the flexor digitorum superficialis of the ring finger is used as the donor tendon and the palmaris longus tendon is used as a dynamic pulley. The distal end of the transferred tendon is anchored to the inside of a newly formed bone hole in the thumb's proximal phalanx using α-TCP cement. Our opponoplasty procedure was uneventful postoperatively and produced satisfactory results in all nine cases. The α-TCP cement procedure shows potential for other tendon transfer applications.
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