Tibial eminence: a new anatomical risk factor for anterior cruciate ligament injuries
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Recently, the geometry of the tibial plateau has drawn a lot of attention as a source of possible risk factors for anterior cruciate ligament injury. The anterior cruciate ligament injuries may be linked to the intrinsic risk factors associated with the tibial plateau. Discovering this kind of risk factors may help in developing the anterior cruciate ligament (ACL) prevention strategies regardless of gender. In this paper, we hypothesize that subjects with smaller tibial eminence volume and height are more susceptible to ACL injury. We further hypothesize this factor remains significant even after adjusting for inter-subject size differences. The tibial eminence in 52 uninjured controls (32 women and 20 men) and 46 anterior cruciate ligament-injured cases (23 women and 23 men) were measured using magnetic resonance images. A t-test was performed to establish any existing differences between groups. The pooled injured population had less tibial eminence volume (p=0.0021) compared with the pooled uninjured population. We observed that small sized tibial eminence volume could be a major risk factor in anterior cruciate ligament injury.
KeywordsAnterior cruciate ligament (ACL) Tibial plateau Tibial eminence ACL injury Risk factors
The authors gratefully acknowledge the support of Dr. Evelyne Fliszar, University of Vermont, for her patient assistance in collecting and evaluating the MRI scans. The support of the National Institutes of Health (R01AR050421; principal investigator, Bruce Beynnon) is also gratefully acknowledged.
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