Abstract
Introduction
The present study aims to investigate the association of the femoral trochlear morphology with the risk of ACL injury and whether this can be considered an additional risk factor in this clinical table.
Materials and methods
This is a retrospective case–control study with 93 patients, 41 patients with ACL total rupture (ACL-TR), and 52 patients without ACL injury who underwent knee magnetic resonance imaging (MRI) between January 2013 and January 2016. The femoral trochlear morphology was evaluated at the proximal and distal levels from the axial knee MRI. The morphological features of the trochlea using sulcus angle, sulcus depth, condylar heights, trochlear sulcus height, percentage of condyles and trochlear sulcus height to transepicondylar width, and lateral and medial trochlear inclination were evaluated. The notch width index was measured on the coronal MR images for notch stenos.
Results
ACL-TR group had a significantly higher sulcus angle (p = 0.00–0.001) and lower sulcus depth (p = 0.00–0.002) than the control group at both levels. Femoral trochlea had morphometric differences between genders. NWI was lower in the ACL-TR group than the control group (control 0.273; ACL-TR 0.247), and there was a statistically significant difference (p = 0.00).
Conclusion
This study was shown that the difference in morphology between the trochlear sulcus of patients with normal and ACL injuries should be taken into account in order to increase awareness of ACL injuries. We observed that mild trochlear dysplasia may cause intercondylar notch stenosis rather than changing the localization of the patella. Studies are needed regarding the effect of trochlear dysplasia on ACL.
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Acknowledgements
We would like to our gratitude to Neslihan Onder Ozdemir (PhD in the University of Sheffield, UK) for doing the article’s “spell check” and “grammar check.”
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This study was approved by the Ethics Committee of Clinical Investigations of the Bursa Uludag University Faculty of Medicine (2015-17/19, 29.09.2015). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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As this study was retrospective, radiological images were used with the approval of the ethics committee without obtaining an informed consent form.
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Isıklar, S., Ozdemir, S.T. & Gokalp, G. An association between femoral trochlear morphology and non-contact anterior cruciate ligament total rupture: a retrospective MRI study. Skeletal Radiol 50, 1441–1454 (2021). https://doi.org/10.1007/s00256-020-03706-3
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DOI: https://doi.org/10.1007/s00256-020-03706-3