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Article Citation - WoS: 21Citation - Scopus: 23Comparison of Biomechanical Behaviour of Maxilla Following Le Fort 1 Osteotomy With 2-Versus 4-Plate Fixation Using 3d-Fea Part 2: Impaction Surgery(Churchill Livingstone, 2009) Atac, M. S.; Erkmen, E.; Yucel, E.; Kurt, A.The aim of the second part of this Study was to evaluate the mechanical behaviour of 2- versus 4-plate fixation and bony structures after Le Fort I impaction surgeries using three-dimensional finite element analysis (3D-FEA). Two 3D-FEA models were created to fixate the impacted maxilla at the Le Fort I level as 2-plate fixation at the piriform rims (IMP-2 model) and 4-plate fixation at the zygomatic buttresses and piriform rims (IMP-4 model). The IMP-2 model contained 225 664 elements and 48 754 nodes and the IMP-4 model consisted of 245 929 elements and 53 670 nodes. The stresses in each maxillary model were computed. The models were loaded on one side, at the molar-premolar region, in vertical, horizontal and oblique directions to reflect the chewing process. It was concluded that the use of 4-plate fixation following Le Fort I advancement Surgery provides fewer stress fields on the maxillary bones and fixation materials than 2-plate fixation from a mechanical point of view.
