Editorial Commentary: Measurement of Sagittal Tibial Tubercle-Trochlear Groove Distance Using Computed Tomography Versus Magnetic Resonance Imaging Yields Different Results.

Abstract

The concept of anterior-to-posterior alterations of the tibial tubercle in reference to the trochlear groove (sagittal tibial tubercle-trochlear groove distance) has become a recent point of interest. These alterations have been noted in patellar instability and have been found to have implications for patellofemoral contact pressures. In characterizing pathology, it is critical to understand the limitations and differences between imaging modalities. Both computed tomography and magnetic resonance imaging are options to evaluate 3-dimensional pathology regarding patellar instability. However, it is evident these measurements are not interchangeable, and a firm understanding of both imaging modality and knee flexion angle is important as we continue to understand this measurement and how we can use this for surgical planning in the treatment of patellar instability.