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Arthroscopic all-inside ligament repair has similar or superior clinical outcomes compared to open repair for chronic ankle instability without concomitant intra-articular pathology at 5 years follow-up

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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Open ligament repair is widely considered the gold standard treatment for chronic ankle instability. Nevertheless, arthroscopic treatment of ankle instability has gained popularity becoming the preferred technique for many surgeons. This study aimed to compare the clinical outcomes of all-inside arthroscopic versus open lateral ligament repair for chronic ankle instability at 5 years follow-up.

Methods

Ninety consecutive patients were surgically treated for chronic ankle instability without concomitant intra-articular pathology observed on MRI: 41 patients [median age 28 (range 15–54) years] underwent an open lateral ligament repair (OLR); 49 patients [median age 30 (range 19–47) years] underwent an all-inside arthroscopic ligament repair (ALR). Functional outcomes using the Foot Functional Index (FFI), the American Orthopaedic Foot and Ankle Society (AOFAS) Hindfoot Score, and the Foot and Ankle Ability Measure-Sports Subscale (FAAM-SS) were assessed preoperatively and at the latest follow-up. At the latest follow-up, the satisfaction rate and complications were also recorded.

Results

The mean follow-up was 58 ± 17.6 (range 47–81) months. In both groups FFI, AOFAS and FAAM-SS score significantly improved compared to preoperative values (p < 0.001). There was no statistically significant difference in postoperative outcomes between groups in the AOFAS (n.s) and FAAM-SS (n.s), but the FFI results were significantly better in the ALR group (p < 0.05). No major complications were reported in either group.

Conclusion

Open and arthroscopic ligament repair to treat chronic ankle instability without concomitant intra-articular pathology produced excellent comparable clinical outcomes at 5 years follow-up. The complications were minimal in both study groups with no significant differences in AOFAS and FAAM-SS scores. However, arthroscopic repair showed significantly better results on the FFI. Therefore, when treating chronic lateral ankle instability, surgeons should consider arthroscopic ligament repair.

Level of evidence

III.

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Data availability

The authors confirm that the data supporting the findings of this study are available within the article.

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Funding

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Contributions

All authors contributed to the study’s conception and design. Material preparation, data collection and analysis were performed by: MG, RB, FM, MD and JV. MG wrote the first draft of the manuscript, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Matteo Guelfi.

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The authors declare they have no conflict of interest.

Ethical approval

This study was approved by the ethical committee of the Hospital Quirón Barcelona with IRB number 00003099.

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Guelfi, M., Baalbaki, R., Malagelada, F. et al. Arthroscopic all-inside ligament repair has similar or superior clinical outcomes compared to open repair for chronic ankle instability without concomitant intra-articular pathology at 5 years follow-up. Knee Surg Sports Traumatol Arthrosc 31, 6052–6058 (2023). https://doi.org/10.1007/s00167-023-07621-7

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