Which stabilization technique corrects anatomy best in patients with AC-separation? An experimental study

In ten human cadaveric shoulder specimens four different parameters were do cumented prior to, and after, dissecting all passive stabilizers. These inc luded the vertical, horizontal and mediolateral acromioclavicular distance, as well as the clavicular rotation. In addition, the same parameters were documented after acromioclavicular (AC) reconstruction using eight differen t techniques. The results showed a good reconstruction of the vertical ac-d istance. Most of the techniques, especially the coracoid-sling procedure, l ed to a significant anterior displacement of the clavicle in relation to th e scapula. To a lesser degree, most of the conventional procedures also res ulted in a lateralization of the acromion and/or clavicular rotation. A bon e anchor system for distal fixation in the base of the coracoid process and a medialized hole in the clavicle restored anatomy best. This new techniqu e therefore is recommended for anatomical AC-reconstruction.