Iranian Journal of Orthopedic Surgery

The Relationship between Posterior Tibial Slope and Tear of Anterior Cruciate Ligamen

Authors

Seyyed Morteza Kazemi
Siyavosh Hemmati Eslamlou
Arash Maleki
Reza Zandi
Mohammad Ali Jalili
Keyghobad Ashoori
Farshad Safdari
https://doi.org/10.22034/ijos.2020.121021
Abstract
Background: The role of increased posterior tibial slope in rupture of the anterior cruciate ligament (ACL) is controversial. The purpose of current study was to determine the effect of posterior slope on the ACL injury. Methods: In a case control study, 61 consecutive cases with ACL injury, who were candidates for reconstruction, were compared with 61 persons with normal knees who were matched for age and sex, over a 2-year period at a teaching hospital in Tehran, Iran. The posterior tibial slope angles were measured on true lateral radiographs on all the cases. The measurement variations were analyzed between the two groups. Results: The mean posterior tibial slope was 9.4±1.8 degrees in controls and 12.3±4.4 in patients with ruptured ACL (p < .001). The incidence of tibial slope greater than 10 degrees in patients with ruptured ACL was 3.1 times greater than that of the controls. Conclusion: This study suggests that increased tibial slope angle may contribute to increased risk for ACL rupture.

Keywords

Tibia
Anterior cruciate ligament
knee

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