人股骨近端空间结构重建新方法及有限元模型的建立

A New Method to Reconstruct the Spatial Structure of Human Proximal Femur and Establishment of the Finite Element Model

在股骨头坏死和股骨颈骨折研究中,股骨头松质骨骨内空间结构及其与生物力学的关系越来越受到关注。在本实验中,我们应用M618型卧轴矩台平面磨床磨削股骨实体标本,吹风机清洁后,使用扫描仪扫描,获得二维断面图像。利用Mimics软件进行三维重建,得到松质骨空间结构的计算机三维图形,计算样本三维空间结构参数。结果提示用本方法获得的数据真实重建了股骨近端的解剖形态,建立清晰、可靠的反映股骨近端骨内空间结构的三维模型,不失为一种研究骨内结构的方法,并为三维有限元分析提供了基础。

In current study of femoral head necrosis and femoral neck fractures,more attentions has been paid to relationship between the femoral head trabecular bone within the spatial structure and its biomechanics.In this connection,PMMA（polymethyl methacrylate）,special square iron,dental base acrylic resin liquid and powder were used to embed and fix human dry femur.Then,M618 Lie Axle Rectangle Desk Plane Grinding Machine was applied to grind the femur specimen,and then air blower clean,two-dimensional cross section image was obtained by using scanner.With Mimics software reconstruction,a three-dimensional model of spatial structure of trabecular bone was obtained,and the trabecular bone three-dimensional parameters were calculated.The authors obtained clear three-dimensional model of trabecular bone,reconstructed the real anatomic morphology of proximal femur.This is a good method to research into the interior structure of femur and to provide the foundation for the three-dimensional finite element analysis.