Mimics14.0软件在胫骨螺钉外固定架模型建立的初步应用

Preliminary application of Mimics 14.0 software in model construction of external fixation of tibia screw

目的利用Mimics 14.0软件重建、组合、赋值外固定架螺钉的三维模型,为遴选适宜的外固定架材料创造条件。方法将CT扫描层厚0.625mm的DICOM格式图像1 000张导入Mimics 14.0软件,筛选出胫骨平台下5cm处图片60张进行三维重建,将螺钉扫描后导入胫骨骨干的三维模型中,利用Mimics 14.0软件的自适应装配,赋值功能生成组合模型。结果胫骨生成4 744个三角面片,创建582 750个单元,螺钉生成4 362个三角面片,创建11 868个单元。结论 Mimics 14.0软件可快速、有效生成三维模型,便于Ansys、Abaqus等有限元软件进行分析,为不同材料属性的螺钉的抗拔出力等生物力学研究提供基础。

Objective To utilize the Mimics 14.0 software to reeonstruct,eomblnate and assign the three dimensional model of external fixation screw to create the condition for selecting appropriate materials of external fixation. Methods 1 000 CT images （0. 625 mm） were inputted to the Mimics 14.0 software. 60 images located at 5 cm below tibia plateau were screened to three di- mensional reconstruction. Meanwhile, screws were scanned to input to the three dimensional model of tibia to generate the new com- bined model with the functions of auto-assembling and assigning material. Results The tibia and screw generated 4 744 triangles, 582 750 elements,4 362 triangles, 11 868 elements respectively. Conclusion The Mimics 14.0 software could generate three dimen- sional model rapidly and effectively,which is convenient to be analyzed by finite element software（Ansys, Ahaqus） ,and provides the theoretical basis of biomechanic study on pullout resistance of different screws.