Perbedaan Lateral Femoral Condyle Ratio pada Pasien Ruptur Anterior Cruciate Ligament Dibandingkan Individu Normal di RSUP H. Adam Malik Medan

Abstract

Background: Anterior cruciate ligament (ACL) rupture is one of the most common knee injuries that can lead to instability and early osteoarthritis if untreated. Several anatomical factors have been proposed to predispose individuals to ACL rupture, including the morphology of the lateral femoral condyle. The Lateral Femoral Condyle Ratio (LFCR) measured on sagittal MRI has been suggested as a reliable parameter to evaluate the posterior convexity of the lateral femoral condyle, which may influence ACL injury risk. Objective: To determine the difference in Lateral Femoral Condyle Ratio (LFCR) between patients with ACL rupture and individuals with normal knees. Methods: This observational analytic study with a cross-sectional design was conducted at H. Adam Malik General Hospital, Medan, from 2021 to 2024. A total of 60 subjects were included, consisting of 30 patients with confirmed ACL rupture and 30 individuals with normal knees as controls. The LFCR was measured using sagittal MRI images of the distal femur, and statistical analysis was performed using an independent t-test with a significance level of p < 0.05. Results: The mean LFCR in the ACL rupture group was significantly higher (0.68 ± 0.03) compared to the normal group (0.61 ± 0.02) with p < 0.001. This indicates that a greater posterior convexity of the lateral femoral condyle is associated with increased ACL rupture risk. Conclusion: There is a significant difference in the Lateral Femoral Condyle Ratio between individuals with ACL rupture and those with normal knees. Higher LFCR values may serve as an anatomical risk factor for ACL rupture and can aid in risk assessment and preventive strategies.