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ORIGINAL ARTICLE
Year : 2015  |  Volume : 15  |  Issue : 3  |  Page : 214-219

Effects of posterior tibial slopes on noncontact anterior cruciate ligament injury


Department of Orthopaedic Surgery, Institute of Post Graduate Medical Education and Research, Kolkata, West Bengal, India

Correspondence Address:
Gopal Ghosh
C/o Bijan Roy, 12 C Garfa 4th Lane, Jadavpur, Kolkata - 700 075, West Bengal
India
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DOI: 10.4103/1319-6308.164275

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Purpose: In the present study, we measured medial tibial slope (MTS) and lateral tibial slope (LTS) separately, using conventional magnetic resonance images (MRIs) of knee joint. The Purpose of the study was to provide reference value of the posterior tibial slope in normal Indian population, and noncontact anterior cruciate ligament (ACL) injured Indian population and, to assess the association between steeper posterior tibial slope and noncontact ACL injury. Methods: In the present study, 60 ACL injured (I) patients (30 male, 30 female) were compared with 60 ACL uninjured (UI) or control population (30 male, 30 female) regarding LTS and MTS. MTS and LTS of each subject were measured using 1.5 tesla MRI of knee joint. Data were analyzed using appropriate statistical analysis. Results: Mean ± standard deviation (SD) MTS of uninjured male, female and pooled population are 6.94 ± 3.205°, 9.28 ± 2.657° and 7.73 ± 3.204° respectively. Mean ± SD MTS of injured male, female and pooled population are 8.13 ± 2.11°, 10.56 ± 1.691°, 8.73 ± 2.261° respectively. Mean ± SD LTS of uninjured male, female and pooled population are 3.77 ± 1.859°, 6.45 ± 3.364°, 4.68 ± 2.757° respectively. Mean ± SD LTS of injured male, female and pooled population are 4.88 ± 2.032°, 8.85 ± 2.22°, 5.85 ± 2.689° respectively. In normal population, MTS and LTS are steeper in female compared to male P < 0.05). LTS is steeper in injured male and female compared to uninjured (P < 0.05). MTS is steeper in injured male compared to uninjured (P < 0.05). Conclusion: Posterior tibial slope specifically LTS could be considered as a significant risk factor for noncontact ACL injury. Steeper posterior tibial slope (MTS and LTS) in female also is an important risk factor that explains the disparity in ACL injury rates between genders.


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