Surgery for extensor tendon injury in zone I
Liu Fan;Shi De.(Affiliated Hospital, Nantong Medical College,Nantong 226001)
Abstract Cases Of mallet finger deformity were treated surgical ly,including 13 primary injuries and 12 secondary injuris.The active extension of DIP joint were -50 ～-70 degrees hypoextension preoperatively. All of them reached 0 degreepostoperatively except one with one -5 degrees hypoextension.The results Were Satisfactory after follow-up for l to 5 years.Based on the pathophysiolgical mechanism of mallet finger.we consider the key points for improving therapentic effectiveness are to shorten the moment arm of load and to hyperextend the DIP jont against flexsion tendency.