ABSTRACT
OBJECTIVE: The purpose of this study was to establish the constructive of craniofacial suture in the three-dimensional finite element model of craniofacial complex in child, to analyse the response procedure of the zygomatic impact, to explore the biomechanics characteristic of the children craniofacial trauma. METHODS: A 7-year-old female was adopted for study The complex cranial geometry was measured from a series of two-dimensional CT images. The multi-lay spiral CT scans were transformed with a self-developed preprocessor into a finite element mesh. The craniofacial sutures were constructed through the MSC Patran program. Identical impact and boundary conditions were used for the zygomatic impact simulations. RESULTS: It has been shown that the finite element model (FEM) exhibited fine morphological and mechanical comparability. The higher stress was showed in the zygomatic regions and atlas occipital articular in 3d FEM. The maximum von Mises stress was found at the zygomatic regions and atlas occipital articular. CONCLUSION: The concentrations of shear stress and tension stress in the suture and articular would increase the risk of injury in this area. But the conduction of the stress might be weakening in the suture of child skull.
Subject(s)
Contusions/pathology , Zygoma/injuries , Zygomatic Fractures/pathology , Biomechanical Phenomena , Child , Contusions/etiology , Female , Finite Element Analysis , Humans , Models, Anatomic , Tomography, Spiral Computed , Zygoma/diagnostic imaging , Zygomatic Fractures/etiologyABSTRACT
OBJECTIVE: The purpose of this study was to explore suppositional sutural construction and protraction in the three-dimensional finite element model of craniofacial complex. METHODS: Combining spiral CT scanning technology with the three-dimensional finite element method, three-dimensional FEM model of craniofacial complex was developed for analysis. In the model, craniofacial sutures were constructed through the MSC. Patran program and different mechanical properties of sutures were applied. Under the same loading condition, bone displacements of the maxilla were calculated. RESULTS: A three-dimensional FE model of craniofacial complex, comprising teeth and craniofacial sutures, was developed. The displacement of the skeletal structures with sutures was significantly larger than that without sutures. CONCLUSIONS: The construction of craniofacial sutures in the three-dimensional finite element model of craniofacial complex could improve the accuracy of finite element model, which set up good foundation for biomechanical studies of craniofacial complex.
