title: Comparison of biomechanical behaviour of maxilla following Le Fort I osteotomy with 2- versus 4-plate fixation using 3D-FEA Part 2: impaction surgery.
abstract: 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 225664 elements and 48754 nodes and the IMP-4 model consisted of 245929 elements and 53670 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.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Gazi University, Emek, Ankara, Turkey. atac@gazi.edu.tr
authors.forename: M S
authors.initials: MS
authors.lastname: Ataç
authors.forename: E
authors.initials: E
authors.lastname: Erkmen
authors.forename: E
authors.initials: E
authors.lastname: Yücel
authors.forename: A
authors.initials: A
authors.lastname: Kurt
mesh_terms: D001696:Biomechanical Phenomena; D001732:Bite Force; D001860:Bone Plates; D002102:Cadaver; D003198:Computer Simulation; D003799:Dental Stress Analysis / Q000379:methods; D020342:Finite Element Analysis; D006801:Humans; D019248:Jaw Fixation Techniques / Q000295:instrumentation*; D008297:Male; D008437:Maxilla / Q000502:physiology* / Q000601:surgery; D008954:Models, Biological; D019340:Osteotomy, Le Fort / Q000295:instrumentation*; D011184:Postoperative Period; D012886:Skull