[Revision and salvage procedures for injuries to the acromioclavicular joint].

Failed conservative treatment or surgical procedures for acute AC joint seperations create the demand for revision or salvage procedures to successfully treat persistent AC joint instability. Besides the classic Weaver-Dunn procedure and its modifications lately new procedures combining a more or less rigid implant for primary stability with a biologic augmentation using an autologous tendon graft have been developed. These procedures are performed arthroscopically or arthroscopically assisted.