Type II FDP Avulsion

- Discussion:
    - most common form;
    - distal end is located in the decussation of the FDS
    - small chip of bone is taken off w/ flexor tendon;
    - tendon retracts to level of PIP joint or distal to PIP, & long vincululm may remain intact;
    - a small chip of bone may sometimes be seen on a true lateral x-ray of finger;
    - there is loss of motion at PIP joint, eventhough the superficialis tendon is not injured;
    - vincula remain intact & therefore reinsertion can be performed up to 6 weeks (even 3 mo) if the tendon does not retract proximally;
    - if type II avulsion retracts proximally to the base of digit, then the vinicula will tear and which mandates repair with in  7 days;
    - in this case, tendon end will enlarge to such a size that its impossible to thread the tendon back thru the digital sheath

Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Wednesday, October 3, 2012 8:45 pm