Morphometric Study On South Chinese Femoral Trochlear Anatomy

OBJECTIVE:There are few studies on the femoral trochlea in the South Chinese population,especially the anatomical morphology of the distal trochlea.In this study,we obtained the anatomical parameters of the trochlea of the patellofemoral joint in the South Chinese normal population by studying the anatomical morphology of the distal trochlea of the patellofemoral joint in the South Chinese normal population,and analyzed the gender dimorphism of these measurement data,providing parameters for designing prostheses suitable for the Chinese population.Methods:In this study,the femoral CT scanning data of 126 subjects were collected to establish a three-dimensional model of the femur and a coordinate system based on the principle of TKA surgery.Osteotomy,point selection,and measurement were performed by automated software to obtain the morphological and anatomical parameters of the distal femoral trochlea.Results:(1)With the increase of knee flexion angle,the trochlear groove angle gradually increased,but there was no gender difference.(2)The inclination angle of the medial and lateral condyles decreased with the increase of the knee flexion angle,and the inclination angle of the lateral condyle was larger than that of the medial condyle.(3)There are significant gender differences in the height and width of the medial and lateral condyles of the knee joint;however,after normalizing the width data by the height of the patients,only the width of the medial and lateral condyles has gender differences in the mid-range of knee flexion.(4)There were obvious gender differences in trochlear and medial and lateral condyle radii,but these differences basically disappeared after standardized parameters of height.Conclusion:Measures of trochlear morphology differ significantly between males and females.This study provides guidelines for the design of appropriate femoral components for TKA,which is suitable for Chinese population,taking into account gender differences in the Chinese population.Surgeons should be aware of gender differences in femoral trochleas to optimize implant selection.