The Evaluation of Femoral Neck Anteversion by Three-dimensional Computed Tomography / 中国医科大学学报

ABSTRACT

Objective To evaluate the femoral neck anteversion (FNA) of patients with unilateral developmental dysplasia of the hip (DDH) and reveal the developmental regularity of the proximal femur.Methods 366 three-dimensional CTs of unilateral DDH patients were categorized into three age groups＜18 months, 18 months-3 years,and＞3 years.The femoral neck anteversion of both sides were measured and a statistical comparison was performed between them.The line chart showing the relationship of femoral neck anteversion and age was drawn to reveal the developmental regularity of the proximal femur.Results In total,the affected side of unilateral DDH had an femoral neck anteversion 1°～5° significantly larger than the unaffected side (P＜0.05).There was no statistical difference between affected and unaffeted sides in age group＜18 months and 18 months-3 years,while it was significant in age group＞3 years.Conclusion Pathological changes of the proximal femur were observed not only the affected side in unilateral DDH but also the unaffected side.The FNA symmetrically developed with age older.