Evaluation of Functional Outcomes of Complete Acromioclavicular Joint Dislocation Treated with the Double Endobutton Technique in a Tertiary Care Hospital

Abstract

Background: Acromioclavicular (AC) joint injuries commonly result from direct trauma, such as falls, contact sports, or motor vehicle accidents. Management of complete dislocations (Rockwood type III-VI) remains debated, with treatment options ranging from sling immobilization to surgery. Surgical intervention is preferred for high-grade dislocations, especially with severe displacement or complications. A promising technique for managing these injuries is the double Endobutton method.

Materials and Methods:This study included 34 participants (aged 18-60) with radiologically confirmed Rockwood III-VI AC joint dislocations. They underwent open reduction and fixation using the double Endobutton technique with fiber wire. Outcomes were assessed using the DASH and Constant scores at 6, 12, and 24 weeks over a 6-month follow-up.

Results:The follow-up assessments showed improvements in ROM(abduction, flexion, and external rotation) over time. Radiological outcome at the 6-week follow-up, all participants (34) maintained reduction with no cases of hardware failure or malalignment. At 12 and 24 weeks, 33 participants maintained reduction, with 1 case of hardware failure at both time points, but no instances of malalignment were observed. The outcomes showed significant improvements, with the improvement in mean DASH score and mean Constant Score. Radiological stability was achieved in 97.1% of the cases.

Conclusion: This study confirms the efficacy of the double Endobutton technique for complete AC joint dislocations, ensuring stable reduction, excellent functional recovery, and minimal complications. Significant improvements in DASH and Constant scores, high patient satisfaction, and faster recovery highlight its advantages. This minimally invasive approach offers a reliable alternative to traditional surgical methods for AC joint stabilization.