Analysis Of Correlation Between Femoral Trochlear Dysplasia And Non-contact Anterior Cruciate Ligament Injury

Objective:To explore the correlation between femoral trochlear morphology and non-contact ACL injury.By measuring the morphology of the femoral trochlea,its influence on the mechanism of ACL injury was explored.Methods:According to the inclusion criteria and exclusion criteria,patients who were treated for orthopedic and knee arthroscopic surgery in Shanxi Bethune Hospital due to non-contact anterior cruciate ligament injury from September 01,2020 to September 01,2022 were selected 60 cases in the injury group,aged 18～60 years,including 36 men and24 women.At the same time,60 patients with normal knee joint by transknee MRI were included as the control group,including 35 males and 25 females.The qualitative parameters(male and female,lateral differential,incidence of trochlear dysplasia)were analyzed by chi-square test.Quantitative parameters(trochlear sulcus depth,trochlear sulcus height,lateral condyle height,medial condyle height,percutaneous condyle width,trochlear sulcus angle,lateral trochlear inclination,intercondylar fossa width index)were tested using independent sample t.All quantitative parameters conform to a normal distribution and are expressed as mean ± standard deviation(x±s),and the difference is considered statistically significant as P<0.05.IBM SPSS version 27.0 software was used for statistical analysis to evaluate the correlation between femoral trochlear dysplasia and non-contact ACL injury.Results:The P value of the ACL injury group and the control group was statistically analyzed to > 0.05 in terms of mean age,sex,lateral discrimination,and Dejour classification of trochlear dysplasia,and the difference was not statistically significant,and different parameters could be compared.The femoral trochlear groove angle,lateral trochlear inclination,trochlear groove depth,trochlear sulcus height,lateral condyle height,medial condyle height and percutaneous condyle width were 144.26±7.117°,20.25 ± 3.639°,0.69±0.124 cm,5.44±0.417 cm,6.30±0.453 cm,5.83±0.419 cm,8.00±0.724 cm,respectively.Control group: femoral trochlear sulcus angle,lateral trochlear sulcus angle,The depth of the sulcus,the height of the trochlear sulcus,the height of the lateral condyle,the height of the medial condyle,and the width of the percutaneous condyle were 133.01±5.694°,22.55±3.250°,0.70±0.105 cm,5.26±0.350 cm,6.12±0.415 cm,6.05±0.429 cm,7.83±0.599 cm,respectively.Among all the indexes,there were statistical differences in femoral trochlear sulcus angle,lateral trochlear inclination,trochlear sulcus height,and medial condyle height(P<0.001;P<0.001;P=0.038;P=0.019)compared with the control group,however,there were no statistical differences in trochlear sulcus depth and lateral condyle height(P=0.814;P=0.050).Compared with the control group,the injury group had a larger femoral trochlear sulcus angle,a smaller lateral trochlear sulcus angle,a higher trochlear sulcus,and a lower medial condyle.Conclusion:This study found that the femoral trochlear dysplasia rate was high in the ACL injury group.There were significant differences between the injury group and the control group,indicating that femoral trochlear dysplasia was associated with ACL injury,suggesting that patients with femoral trochlear dysplasia had a higher risk of ACL injury,and it was recommended to perform pre-injury training.