Researsch of correlation between non-contact anterior cruciate ligament tear and anatomical risk factors of knee joint based on MRI
GAO Hui-jing
XU Shang-wen
LIN Shan
WANG Rong-jing
Abstract：Objective To investigate the correlation between non-contact anterior cruciate ligament(ACL)tears and patellar position,femoral trochlear dysplasia,and the α angle.Methods 135 patients who underwent arthroscopically confirmed ACL tears and had routine preoperative MRI examinations at our hospital between April 2019 and July 2022,serving as the ACL tears group.Meanwhile,100 cases of knee MRI without ACL tears from the same period were randomly selected as the control group.The differences in patellar position,femoral trochlear morphology,and α angle between the ACL tear group and the normal group were compared.Binary logistic regression was used to assess the effects of gender,patellar position,femoral trochlear morphology,and α angle on the occurrence of ACL tears in the study population.Results The incidence of ACL tears was higher in males than in females,with statistically significant differences between groups(P＜0.05).Compared to the control group,the ACL tear group showed statistically significant differences in the distance from the upper edge of the tibial tubercle to the inferior patellar cartilage,the MIS index,femoral trochlear groove depth,trochlear groove angle,and α angle(P＜0.05).Binary logistic regression analysis showed that patella alta(OR=2.86,P＜0.05),trochlear groove angle(OR=10.18,P＜0.05),and the α angle(OR=1.18,P＜0.05)were independent predictors of ACL tears.Receiver operator characteristic curve analysis indicated that an increased MIS index,enlarged trochlear groove angle,and greaterαangle were associated with an increased risk of ACL tears.Conclusion Patients with ACL tears had a higher distance from the upper edge of the tibial tubercle to the inferior patellar cartilage,higher MIS index,higher incidence of femoral trochlear dysplasia,and greater α angle compared to individuals with normal ACLs.
Keywords：Knee jointAnterior cruciate ligamentTrochlear dysplasiaMagnetic resonance imaging
Publication Date：2025-02-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 59-64 )