Zusammenfassung
Kollateralbandverletzungen der Fingergrundgelenke sind selten. Die Diagnose erfolgt klinisch und anhand von Standardröntgenaufnahmen. Leitsymptome sind lokale Schmerzen und die Gelenkinstabilität. Eine Instabilität wird klinisch durch Aufklappbarkeit in 90° Beugung des Gelenks nachgewiesen. Bei Grad-I-Verletzungen ist die Stabilität bei Überdehnung des Bandes oder kleineren partiellen Rissen erhalten. Grad-II-Verletzungen zeigen eine Aufklappbarkeit des Gelenks mit deutlichem Anschlag aufgrund einer Teilruptur, Grad-III-Verletzungen eine Aufklappbarkeit ohne festen Anschlag infolge einer kompletten Ruptur.
Grad-I- und II-Verletzungen sowie undislozierte knöcherne Ausrisse werden konservativ für 6 Wochen mit einer Achterschlaufe behandelt. Bei persistierender Instabilität oder Grad-III-Verletzungen erfolgt die Bandnaht oder -refixation. Kleinere Avulsionsfragmente werden entfernt und das Kollateralband knöchern refixiert. Größere Fragmente werden durch entsprechende Implantate fixiert. Eine adäquate Therapie führt zu guten Ergebnissen. Selbst bei chronischen Rissen ist die Rekonstruktion mit lokalem Material oder Sehnentransplantaten in der Regel erfolgreich.
Abstract
Collateral ligament injuries of the metacarpal joints of the fingers are rare conditions. The injury should be diagnosed by clinical investigation and standard radiographs. Leading symptoms are local tenderness and joint instability. Instability is verified by clinical stress testing of the metacarpophalangeal joint in 90° of flexion. In Grade I injuries stability is preserved due to ligament attenuation or small partial tears. Grade II injuries show laxity with firm endpoint according to incomplete tear. In Grade III injuries instability without endpoint can be found as a result of complete tears. Radiographs may show avulsed bone fragments.
In Grade I and II tears or non- displaced avulsion fragments treatment is conservative with buddy taping for 6 weeks. In case of persistent instability or grade III tears suturing or refixation of the ligament are performed. Small avulsion fragments are removed and the ligament is fixed to the bone. Greater avulsion fragments are fixed by suitable small implants. Adequate treatment will lead to reliable good results. Even in chronic tears reconstruction with local material or tendon transplants is usually successful.
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Pillukat, T., Schädel-Höpfner, M., Windolf, J. et al. Kollateralbandverletzungen der Fingergrundgelenke. Unfallchirurg 115, 616–622 (2012). https://doi.org/10.1007/s00113-012-2174-3
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DOI: https://doi.org/10.1007/s00113-012-2174-3