Factors Related to Distal Interphalangeal Joint Extension Loss After Extension Block Pinning of Mallet Finger Fractures

The Journal of Hand Surgery
Jin Young Kim, Sung Hyun Lee

Abstract

To identify factors related to postoperative extension loss when treating mallet finger fractures with extension block pinning. We reviewed 31 consecutive patients with a mallet finger fracture treated with extension block pinning. We measured range of motion of the distal interphalangeal (DIP) joint including extension lag. We investigated the injury mechanism and checked radiographic factors such as DIP joint subluxation, fixation angle, fragment size index, fracture angle, and amount of articular involvement. We performed statistical analyses such as correlation analysis, multiple regression analysis, and independent t test to investigate factors related to postoperative extension loss. Mean voluntary extension loss at final follow-up was 5° (range, 0° to 20°) and mean active flexion of the DIP joint was 84° (range, 75° to 90°). Sixteen patients had a forceful flexion injury and 15 had a simple blow injury. Fixation angle was not associated with postoperative extension loss. Postoperative extension loss increased significantly in the forceful flexion group compared with that in the simple blow injury group. Fragment size index, fracture angle, and amount of articular involvement decreased significantly in the forceful flexio...Continue Reading

References

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Citations

Sep 29, 2021·Handchirurgie, Mikrochirurgie, plastische Chirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft für Handchirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft für Mikrochirurgie der Peripheren Nerven und Gefässe : Organ der Vereinigung der Deut·Jae Hoon LeeJong Hun Baek

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