Abstract
Satisfactory results were obtained in 20 of 21 abductor digiti minimi opponensplasties performed in children with congenital radial dysplasia. A modified technique left the muscle attached to the pisiform and did not require complete dissection of the neurovascular structures. An adequate subcutaneous tunnel was made to accept the transferred muscle and laxity of the ulnar collateral ligament of the metacarpal-phalangeal joint of the thumb, a consistent finding in patients with isolated aplasia of the abductor pollicis brevis and opponens pollicis muscles, was repaired by imbrication and suture of one of the tendinous slips to the ulnar capsule.
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