Akute Sprengung des Akromioklavikulargelenks

Dislocation of the acromioclavicular joint (AC joint) is a typical sports injury with rupture of the acromioclavicular and coracoclavicular ligaments which may result in a vertical and horizontal instability of the lateral clavicle. Stress X-rays may be of help for the diagnosis of vertical instability and for the diagnostics axial or Alexander views should be made. In the future magnetic resonance imaging (MRI) will play a significant role for the diagnostics of AC joint injuries. With this method injuries of ligaments, fascia and the glenohumeral joint can be diagnosed. There is controversy regarding the therapy of AC joint injuries. For slight injuries a conservative treatment is recommended, for medium degree instability there is too little evidence in the literature to give a clear recommendation whether conservative or operative treatment is superior and for severe instability an operative treatment is recommended. For operative treatment several techniques have been described. Some techniques have a high complication rate and implant removal is also disadvantageous. These disadvantages led to the development of minimally invasive or arthroscopic techniques. The first clinical results of these new techniques are encouraging.