The Seidel nail revisited- an evaluation of recent design change
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This study evaluated a recent design change of the distal locking mechanism of the Seidel nail. The distal expansion bolt has been modified to incorporate a swagged rotating collar. The torque requirement for distal locking was measured for the original and new bolt design using a composite bone humeral model. Ten of each screw type were tested. The torque requirement for distal locking was less in the original bolt design. However the torque transmission is smoother in the new bolt design making appreciation of adequate locking more reliable.
Key wordsHumerus Seidel Intramedullary nail Torque
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