ABSTRACT
Objective:To evaluate the effect of age and gender on the femoral morphology to guide prosthesis selection in operation and design. Methods:A total of 500 females and males were collected from the departments of orthopedics and medical radiology, Second Xiangya Hospital, Central South University. Informed consent was obtained from all subjects. All patients underwent anteroposterior position scan of the left or right hip joint using Philips Digital Diagnost DR system. The shooting range included the hip joint and at least 2/3 of the proximal femur. The images were measured with Onis 2.3 software. We measured 13 parametersfromthepatients,includingtheexternalparamtersofthefemur,radius-lengthparameters of femoral medullary cavity, and morphological parameters of the femoral medullary cavity. Results:Compared with Westeners, the offset was smaller, while the neck shaft angle was signiifcantly larger in Chinese population (P0.05). The main differences between 31 and 70 years old were the diameter of femoral head, the offset of isthmus, the medullary cavity diameter and extracortical width at isthmus level and the medullary cavity diameter at the level of the lesser trochanter (P<0.05). The modullary transverse diameter at 20 mm below the lesser trochanter and isthmus and extracortical width of isthmus in the male and female group was positively correlated with age (P<0.01), while the parameters of the proximal femoral canal morphology in the female group were negatively correlated with age. The female canal parameters had a stronger correlation. Conclusion:Chinese proximal femoral parameters are signiifcantly different from Westerners. When people, especially females, get older, the medullary cavity diameter of the isthmus and proximal femur becomes wider and the morphology of the femur becomes straight. The difference in the femoral morphology between the male and female decline with the age. There is almost no difference for the over 70 years old. For the 31-70 years old, The male femoral cavity diameter is larger and the position of isthmus is lower than in the females.