Fig. 7

Mallet fracture (a). A mini-hook plate captured the dorsal avulsed fragment (b). Plain radiography 2-weeks post-operation demonstrated that the mallet fragment with the hook plate had slightly migrated proximally and dorsally (c). The plate was exposed to the dorsal skin, and the patient underwent revision surgery (extension block pinning) after plate removal (d). Plain radiography 57 months post-operation reveals that the osseous fragment was well united, but the articular surface was incongruent. The total range of DIP joint motion was 50%, and the pinching strength was 45% compared to the values of the same contralateral joint (e, f)