Follow-up study of the isolated rupture of the flexor digitorum profundus tendon.

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Twenty-one fingers in 19 cases of the isolated rupture of the flexor digitorum profundus tendon were analyzed.The age of patients ranged from 2 to 60 years (average; 33 years). Concerning the preoperative conditions, 21 fingers were classified into four degrees by the criteria of Tubiana & Pulvertaft (1983) and the results were as follows:Degree I: 11 casesII: 3III: 2IV: 5Methods of tendon repair were direct suture on 11 fingers, advancement on 4 fingers and tendon graft on 5 fingers.About these cases, a total active range of motion (TAM), an extension lag and a range of motion of DIP joint were measured in each repair group, and concerning the method of tendon repair, there were no meaningful differences between each group, except for the extention lag of DIP joint in the case of advancement, which was relatively more than those of direct suture or tendon graft.Postoperative results partly correlated with the preoperative condition, and in the cases with bone or joint injury (Deg. III), or skin defect (Deg. IV), their prognosis tended to be lowered.Direct suture is the first choice, concerned with the selection of tendon repair, but advancement could be indicated when tendon rupture occurs within 1cm from its insertion, and tendon graft could be indicated in the case with severe scar formation or with long preoperative period.