title: Biomechanical Evaluation of Different Fixation Methods for Mandibular Anterior Segmental Osteotomy Using Finite Element Analysis, Part Two: Superior Repositioning Surgery With Bone Allograft.
abstract: In this study, the biomechanical behavior of different fixation methods used to fix the mandibular anterior segment following various amounts of superior repositioning was evaluated by using Finite Element Analysis (FEA). The three-dimensional finite element models representing 3 and 5 mm superior repositioning were generated. The gap in between segments was assumed to be filled by block bone allograft and resignated to be in perfect contact with the mandible and segmented bone. Six different finite element models with 2 distinct mobilization rate including 3 different fixation configurations, double right L (DRL), double left L (DLL), or double I (DI) miniplates with monocortical screws, correspondingly were created. A comparative evaluation has been made under vertical, horizontal and oblique loads. The von Mises and principal maximum stress (Pmax) values were calculated by finite element solver programme. The first part of our ongoing Finite Element Analysis research has been addressed to the mechanical behavior of the same fixation configurations in nongrafted models. In comparison with the findings of the first part of the study, it was concluded that bone graft offers superior mechanical stability without any limitation of mobilization and less stress on the fixative appliances as well as in the bone.
authors.affiliation: *Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Gazi University †Department of Manufacturing Engineering, Faculty of Engineering, Atilim University, Ankara, Turkey.
authors.forename: Yeliz
authors.initials: Y
authors.lastname: Kilinç
authors.forename: Erkan
authors.initials: E
authors.lastname: Erkmen
authors.forename: Ahmet
authors.initials: A
authors.lastname: Kurt
mesh_terms: D064591:Allografts / Q000637:transplantation*; D001696:Biomechanical Phenomena; D001732:Bite Force; D001860:Bone Plates; D001863:Bone Screws; D016025:Bone Transplantation / Q000379:methods*; D003198:Computer Simulation; D054893:Cone-Beam Computed Tomography / Q000379:methods; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008334:Mandible / Q000601:surgery; D063168:Mandibular Osteotomy / Q000295:instrumentation / Q000379:methods*; D008954:Models, Biological; D013314:Stress, Mechanical