Structural Failure After Acromioclavicular Joint Reconstruction: Factors Affecting Clinical Outcomes

Area of Science:

• Orthopedic Surgery
• Sports Medicine
• Reconstructive Surgery

Background:

• Acromioclavicular (AC) joint injuries present management challenges, with surgical reconstruction outcomes influenced by potential structural failures.
• Loss of reduction post-AC reconstruction is common, but its impact on clinical results requires further investigation.

Purpose of the Study:

• To assess clinical outcomes in patients experiencing structural failure after AC joint reconstruction.
• To identify predictors of suboptimal results, including reoperation or poor functional scores, in this patient cohort.

Main Methods:

• A cohort of 29 patients with ≥50% loss of AC joint reduction post-reconstruction (2013-2019) was reviewed.
• Failures were classified by displacement and mechanism (reinjury vs. spontaneous). Suboptimal outcomes were defined by reoperation or ASES score <80.
• Bivariate analyses examined risk factors for poor outcomes and compared management strategies.

Main Results:

• Mean follow-up was 7.4 years; 41% had suboptimal outcomes (ASES <80 or reoperation).
• Structural failure due to acute reinjury correlated with worse clinical outcomes (50% vs. 6%) and increased reoperation rates (67% vs. 13%).
• Most patients (79%) were managed nonoperatively, while 21% required revision surgery.

Conclusions:

• Structural failures of AC reconstruction following acute reinjury are associated with significantly worse clinical outcomes and a higher need for reoperation.
• These findings suggest that the mechanism of failure influences patient prognosis after AC reconstruction.
• Further studies are needed to elucidate additional factors affecting outcomes and to refine management protocols for AC joint reconstruction failures.