# Single‐stage autograft revision for failed ligament advanced reinforcement system (LARS) anterior cruciate ligament reconstruction: Improved clinical outcomes at a minimum 5‐year follow‐up

## TL;DR

This study shows improved knee function after revising failed LARS ACL surgery, but finds widespread joint damage and inflammation.

## Contribution

Demonstrates clinical effectiveness of single-stage autograft revision after LARS ACL failure with long-term follow-up.

## Key findings

- Clinical scores significantly improved after revision surgery with a mean follow-up of 7.8 years.
- All patients showed synovial inflammation and 68% had severe chondral lesions during revision surgery.
- Early arthritic changes were present in 52% of patients preoperatively.

## Abstract

To evaluate mid‐term clinical outcomes and intraoperative findings in patients undergoing single‐stage revision after failed ligament advanced reinforcement system (LARS) anterior cruciate ligament reconstruction (ACLR).

This retrospective study evaluated patients who underwent ACL revision surgery following initial reconstruction using the LARS device. Clinical assessments included the Tegner activity scale, Lysholm Knee score, and International Knee Documentation Committee (IKDC) scores, recorded preoperatively and at a minimum follow‐up of 5 years. Preoperative imaging was conducted to assess tunnel widening, alignment, and the presence of arthritic changes. Intraoperative evaluations included arthroscopic inspection of the synovium, menisci, and cartilage. Synovial biopsies were obtained for histological analysis of inflammation.

Twenty‐five patients were included in the study. Clinical scores demonstrated significant improvement in Tegner activity scale (p = 0.0006), Lysholm Knee score (p = 0.0001) and IKDC score (p = 0.0001) following revision surgery, with a mean follow‐up duration of 7.8 years (SD = 2.13). Preoperative imaging revealed early arthritic changes in 52% of patients. Intraoperative findings showed that all patients exhibited synovial membrane inflammation, with a 100% incidence of synovitis. Additionally, 68% of patients presented with Stage III or IV chondral lesions according to the ICRS classification.

Single‐stage revision ACLR using autografts led to significant clinical improvement after LARS ACLR failure, with a mean follow‐up of 7.8 years. All cases during revision demonstrated synovial inflammation, with a high prevalence of chondral lesions and early arthritis. While these findings may point to a potential association between synthetic grafts and degenerative joint pathology, causality cannot be established, as degenerative changes are known to occur following failed ACL reconstructions regardless of graft type.

Level IV.