| Objective:To measure and compare the differences of bone anteversion between patients with patellar instability and healthy volunteers,and to analyze the correlation between patellar instability and femoral anteversion and lower limb rotation force line abnormality,and to analyze the causes through the three-dimensional reconstruction model of patients with hip and knee CT scanning data,so as to provide theoretical basis for clinical diagnosis and treatment.Methods:30 patients with patellar instability in the Department of bone and joint surgery and sports medicine of our hospital from October 2018 to October 2020 were selected as the research objects,and the above patients were listed as the experimental group.Another 30 healthy volunteers recruited by our hospital at the same time were selected as the control group.All the researchers used multi-slice CT to scan the patellar joint Then,the three-dimensional model of CT data was reconstructed by mimics research software,and the femoral anteversion angle was calculated to analyze the correlation between the angle and patellar joint instability and lower limb rotation force line abnormality.Results:After measurement and analysis,the femoral anteversion angle of patients with patellar instability was significantly different from that of healthy volunteers,with statistical significance(P<0.05).The increase of femoral anteversion angle was positively correlated with patellar instability,and the increase of femoral anteversion angle was positively correlated with the possibility of abnormal rotation of lower limbs.Conclusion:Femoral anteversion angle can be used as the clinical diagnostic criteria for patients with patellar instability,and its angle is larger than that of normal healthy people.Patellofemoral instability is related to the increase of femoral anteversion angle,and the increase of femoral anteversion angle may increase the possibility of lower limb rotation disorder,affecting the stability of patellofemoral joint. |
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