This study aims to inform clinical decision-making by thoroughly examining the outcomes of different treatment approaches for lateral quarter clavicle fractures and acromioclavicular dislocations. By evaluating the safety and efficacy of Knotless AC TightRope® repair devices and comparing short- and long-term results with other fixation techniques, the investigators hope to contribute to the improvement of treatment protocols for these common shoulder injuries. This research could significantly impact patients' quality of life by enabling optimal recovery and restoration of shoulder function.