No Difference in Ankle Morbidity Between the Leg with Peroneus Longus Used for ACL Reconstruction Autograft and the Contralateral Side 12 Months Postoperatively

Background Anterior cruciate ligament (ACL) injuries often require surgical intervention. The use of the peroneus longus tendon in ACL reconstruction has been reported to offer significant potential benefits, such as preserving the hamstring tendons. However, its effects on the ankle must be considered prior to surgery. Methods This was a cross-sectional study evaluating ankle morbidity using the American Orthopedic Foot and Ankle Society (AOFAS) score, plantarflexion and eversion strength, and Clarke’s angle on both extremities. Data were collected from patients who underwent ACL reconstruction using the peroneus longus tendon as an autograft. Statistical analysis was performed using the Mann-Whitney test with SPSS v.26. Results A total of 64 patients were included, with the mean AOFAS scores of 58.88 (donor side) and 70.12 (contralateral side). Mann-Whitney test results showed no significant difference in AOFAS scores between the two sides (p=0.085). The mean plantarflexion strength values were 62.23 (donor) and 66.77 (contralateral), with no significant difference (p=0.489). Additionally, the mean Clarke’s angle values were 59.10 (donor) and 69.90 (contralateral), with no significant difference (p=0.099). Conclusion There was no statistically significant difference in ankle function in patients who used the peroneus longus tendon as an autograft in ACL reconstruction.