Wheeless' Textbook of Orthopaedics - Zone 2 thumb
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Disruption of terminal extensor tendon distal to or at the DIP joint of the fingers and IP joint of the thumb (EPL) • Mallet Finger. Zone II, • Disruption of tendon over. Thumb. TI, TII, TIII. Outcomes different than fingers. Early motion protocols do not in zone 2 injuries, repair of one slip alone improves gliding.