A higher posterior tibial slope can potentially result in kinetic and kinematic changes of the knee. These changes may influence knee functionality in ACL-deficient and ACL-reconstructed subjects. The purpose of this study was to investigate the relationship between knee functionality and posterior tibial slope in ACL-deficient and ACL-reconstructed subjects. Subjects with isolated ACL injuries and subjects who underwent ACL-reconstruction with bone-patella-bone-tendon (BPTP) between 18 and 24 months post surgery were included in the study. Posterior tibial slope was measured on a lateral radiograph using the posterior tibial cortex as a reference. The Cincinnati scoring system was used to assess knee functionality.Purpose:
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