RESUMEN
A finite element model of human mandible is developed from CT scan images by the technologies of three-dimensional reconstruction, image processing and meshing. The mandible model is connected to one modified head model of Hybrid III dummy with joint according to the anatomic structure and mechanical characteristics of the temporomandibular joint. Then a finite element model of the human head with the true anatomic structure mandible is developed. This model has been validated with the cadaver test results. It can be used in researches on the mechanism of craniofacial blunt-impact injury and on the assessment of injury severity.
Asunto(s)
Humanos , Fenómenos Biomecánicos , Traumatismos Craneocerebrales , Análisis de Elementos Finitos , Cabeza , Procesamiento de Imagen Asistido por Computador , Imagenología Tridimensional , Mandíbula , Modelos Anatómicos , Tomografía Computarizada EspiralRESUMEN
Setting up the 3D finite element (FE) model on the basis of medical images is a necessary method of biomechanical analysis. The pretreatment, including data processing of images and mesh generation, becomes the bottleneck of FE analysis, and this is especially the case of the modeling for thoracic vertebrae, because the shapes and data are complicated. In this paper, on the basis of the data for building a 3D FE model of thoracic vertebrae, we present some structures and types of data which are essential for the reconstruction of CT medical image, analyze some methods for obtaining and processing the data from images, and then advance a theory for data management based on mesh generation by block with the software MSC. Marc. A 3D-FE Model of T10-T12 thoracic vertebrae is set up, which keeps the configuration of the true one, and satisfies the requirements of biomechanical analysis. We focus affention on the data obtainment and management during medical image processing and FE modeling, all of which are very important for the biomechanical analysis. It is helpful and instructive to reconstruct some similar tissues of human body on the basis of the medical images from CT, MRI, etc.