• Der Unfallchirurg · Sep 2001

    [Management of proximal scaphoid bone pseudarthroses and fractures with the mini-Herbert screw via a dorsal approach].

    • M Küntscher, M Tränkle, M Sauerbier, G Germann, and B Bickert.
    • BG Unfallklinik Ludwigshafen, Klinik für Plastische, Rekonstruktive und Handchirurgie-Brandverletztenzentrum, Plastische und Handchirurgie der Universität Heidelberg, Ludwig Guttmann-Strasse 13, 67071 Ludwigshafen. markus.kuentscher@urz.uni-heidelberg.de
    • Unfallchirurg. 2001 Sep 1; 104 (9): 813-9.

    Abstract32 patients, aged 16 to 49 years, were treated by osteosynthesis using the Herbert mini screw. The indications were five fractures (type B3, Herbert classification), two delayed unions (type C) and 25 nonunions (type D1 to D3, Filan and Herbert classification). Six patients received no bone grafts, 19 received cancellous bone graft from the radius. An interpositional iliac crest bone graft was used in four, and a vascularized bone graft from the distal radius in three cases respectively. The average postoperative immobilisation in a forearm splint was nine weeks. 26 patients could be recruited for clinical follow-up at an average of 14.5 months. The radiological results were assessed in 30 cases (94%). Bony consolidation was achieved in 26 cases (100% of the fractures, 84% of the nonunions). In three cases a loosening of the screw, and in three further cases a dislocation into the radiocarpal joint were observed. A humpback deformity was present in four cases. Three patients showed a persisting nonunion, one patient a fibrous union. Early degenerative changes of the radiocarpal joint were observed in six cases. The clinical follow up examination showed an average grip strength of 91% (JAMAR II), 94% for the three finger, and 95% for the pinch grip compared to the contralateral side. The mean postoperative pain score on the visual analog scale was one for resting conditions, eleven for motion and 33 under stress. The range of motion was 79% of the opposite side for extension/flexion and 83% for radial/ulnar deviation. The average DASH-score reached 15 points. The Herbert mini screw has proven to be a reliable implant for reconstruction of proximal pole fractures and nonunions of the scaphoid.

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