Anatomical Study on the Reconstruction of the Anterior Talofibular Ligament.

The purpose of this study aimed to (1) identify the relationship between the fibula and the talus of the anterior talofibular ligament (ATFL); (2) collect detailed anatomical data and provide anatomical basis for ATFL anatomical reconstruction. We selected 27 ankle specimens of adult cadavers (9 left feet and 18 right feet in 11 males and 16 females; mean age 41.6 years) with the exception of ankle deformities, fractures, underdevelopment and degenerative diseases. In these 27 specimens,15 cases of ATFL were divided into two bundles and 12 cases of ATFL were single bundles. The average ATFL length was 20.31 ± 3.12mm. The center of the ATFL in 11 specimens was located in the calcaneofibular ligament (CFL) foot print area. The long axis of the fibula side stop point was 8.83±1.82 mm, and the short axis was 3.12±0.49 mm. The distance from the center of the ATFL fibula attachment area to the tip of the fibula was 14.22±2.87 mm, and the distance from the center of the CFL is 5.57±1.80mm. The distance from the center of the ATFL talar attachment area to the tibiotalar articular surface was (9.74±2.12) mm, and the distance from the anterior external cartilage surface of the talus was (4.87±1.82) mm. The angle between ATFL and the long axis of the fibula is 78°±12°. Our results suggest that in ATFL reconstruction, the anatomical attachment points around the ATFL or the angle between ATFL and the long axis of the fibula both can be used for bone canal positioning.