Comput Methods Programs Biomed - Establishment of sequential software processing for a biomechanical model of mandibular reconstruction with custom-made plate.

Tópicos

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Resumo

The aim of this study is to describe the sequential software processing of computed tomography (CT) dataset for reconstructing the finite element analysis (FEA) mandibular model with custom-made plate, and to provide a theoretical basis for clinical usage of this reconstruction method. A CT scan was done on one patient who had mandibular continuity defects. This CT dataset in DICOM format was imported into Mimics 10.0 software in which a three-dimensional (3-D) model of the facial skeleton was reconstructed and the mandible was segmented out. With Geomagic Studio 11.0, one custom-made plate and nine virtual screws were designed. All parts of the reconstructed mandible were converted into NURBS and saved as IGES format for importing into pro/E 4.0. After Boolean operation and assembly, the model was switched to ANSYS Workbench 12.0. Finally, after applying the boundary conditions and material properties, an analysis was performed. As results, a 3-D FEA model was successfully developed using the softwares above. The stress-strain distribution precisely indicated biomechanical performance of the reconstructed mandible on the normal occlusion load, without stress concentrated areas. The Von-Mises stress in all parts of the model, from the maximum value of 50.9MPa to the minimum value of 0.1MPa, was lower than the ultimate tensile strength. In conclusion, the described strategy could speedily and successfully produce a biomechanical model of a reconstructed mandible with custom-made plate. Using this FEA foundation, the custom-made plate may be improved for an optimal clinical outcome.

Resumo Limpo

aim studi describ sequenti softwar process comput tomographi ct dataset reconstruct finit element analysi fea mandibular model custommad plate provid theoret basi clinic usag reconstruct method ct scan done one patient mandibular continu defect ct dataset dicom format import mimic softwar threedimension d model facial skeleton reconstruct mandibl segment geomag studio one custommad plate nine virtual screw design part reconstruct mandibl convert nurb save ige format import proe boolean oper assembl model switch ansi workbench final appli boundari condit materi properti analysi perform result d fea model success develop use softwar stressstrain distribut precis indic biomechan perform reconstruct mandibl normal occlus load without stress concentr area vonmis stress part model maximum valu mpa minimum valu mpa lower ultim tensil strength conclus describ strategi speedili success produc biomechan model reconstruct mandibl custommad plate use fea foundat custommad plate may improv optim clinic outcom

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