Zusammenfassung
Hintergrund
Verletzungen der distalen tibiofibularen Syndesmose sind häufig und sorgen in der klinischen Praxis immer wieder für Kontroversen.
Ziel der Arbeit
Dieser Beitrag fasst den aktuellen Wissensstand über Syndesmoseninstabilitäten zusammen und zeigt Empfehlungen in der Behandlung von Syndesmosenverletzungen auf.
Material und Methoden
Auswertung der aktuellen Literatur hinsichtlich Anatomie, Ätiologie, Diagnostik und Therapie von Syndesmosenverletzungen.
Ergebnisse
Stabile rein ligamentäre Verletzungen können frühfunktionell mittels Physiotherapie behandelt werden. Relevante Instabilitäten der Syndesmose resultieren aus einer Ruptur von mindestens 2 Ligamenten und müssen operativ stabilisiert werden. Instabile Syndesmosenrupturen sind häufig mit knöchernen Avulsionen oder Malleolarfrakturen assoziiert. Zur anatomischen Reposition der distalen Fibula in der Inzisur der distalen Tibia und stabilen Fixation werden bevorzugt eine oder mehrere tibiofibulare Schrauben eingebracht. Alternativ werden biodegradierbare oder flexible Implantate verwendet. Es besteht keine einheitliche Meinung in der Literatur über die Dauer der Fixierung. Schrauben und flexible Implantate, die Beschwerden verursachen, müssen entfernt werden. Die häufigste Komplikation ist die Fehlreposition, die sich durch direkte intraoperative Visualisierung und 3D-Darstellung minimieren lässt. Weitere Komplikationen sind Materialversagen, Verwachsungen, tibiofibulare Synostosen, chronische Instabilität und posttraumatische Arthrose.
Schlussfolgerung
Wichtigste Prognosefaktoren nach instabilen Verletzungen der distalen tibiofibularen Syndesmose mit oder ohne Fraktur sind die anatomische, stabile Wiederherstellung der Knöchelgabel und die Einpassung der distalen Fibula in die Tibiainzisur.
Abstract
Background
Injuries to the distal tibiofibular syndesmosis are frequent and continue to generate controversy due to an extensive range of diagnostic techniques and therapeutic options.
Objective
The aim of this review is to summarize the current knowledge on syndesmotic instability and to present some recommendations for the clinical practice for acute an chronic injuries.
Material and methods
Analysis of the current literature concerning the anatomy, etiology, diagnostics and treatment of syndesmosis injuries.
Results
Purely ligamentous injuries (high ankle sprains) are not associated with a latent or frank tibiofibular diastasis and can be treated with an extended protocol of physiotherapy. Relevant instability of the syndesmosis with diastasis results from rupture of two or more ligaments and requires surgical stabilization. Syndesmotic disruptions are commonly associated with bony avulsions or malleolar fractures. Treatment consists of anatomic reduction of the distal fibula into the corresponding incisura of the distal tibia and stable fixation. The proposed means of fixation are one or more tibiofibular screws or suture button implants. There is no consensus on how long to maintain fixation. Both syndesmotic screws and suture buttons need to be removed if symptomatic. The most frequent complication is syndesmotic malreduction and can be minimized with direct visualization and intraoperative 3D scanning. Other complications include hardware failure, adhesions, heterotopic ossification, tibiofibular synostosis, chronic instability and posttraumatic arthritis.
Conclusion
The single most important prognostic factor after unstable injury of the distal tibiofibular syndesmosis with or without fracture is the anatomic reduction of the distal fibula and fitting into the tibial incisura.
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Rammelt, S., Manke, E. Syndesmosenverletzungen. Unfallchirurg 121, 693–703 (2018). https://doi.org/10.1007/s00113-018-0508-5
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DOI: https://doi.org/10.1007/s00113-018-0508-5