股骨近段髓腔的CT测量及股骨假体设计

CT measurement of the proximal femur and design of femoral prosthesis

背景:人工关节大多根据西方人种设计,与国人股骨近段髓腔存在一定差异。目的:通过CT测量股骨近段横断面的髓腔内径参数,为设计符合国人的髋关节假体提供数据。方法:通过CT对61例初次行全髋关节置换成年人的健侧股骨近段进行扫描,连续扫描3层,层厚均2mm,测量股骨颈平面、股骨小转子平面、股骨峡部平面的髓腔内径等参数。结果与结论:股骨峡部平面的各径线之间、股骨颈平面的宽径与内侧径之间、股骨小转子平面的长径与内侧径之间都存在着显著相关性(P<0.05)。股骨颈平面的长径、宽径、内侧径及股骨峡部平面的皮质厚度在男女之间差异具有显著性意义(P<0.05)。所测3个平面的径线可为该类型股骨假体的设计提供数据支持。

BACKGROUND：Prostheses designed for Western is not very suitable for Chinese proximal femur.OBJECTIVE：To provide reference for prosthesis design for Chinese based on the dimensions of proximal femur measured from CT films.METHODS：The dimensions were measured at the neck,lesser trochanter and isthmus of the femur from 61 patients by CT films.RESULTS AND CONCLUSION：There was a correlation among the three dimensions of the femoral isthmus,between wide-dimension and medial-dimension of the femoral neck,and between long-dimension and medial-dimension of the lesser trochanter of the femur（P 0.05）.There was a difference between men and women in wide-dimension,long-dimension,medial-dimension of the femoral neck and cortical thickness of the femoral isthmus.Measurement data of the proximal femur could provide reference for prosthesis design.