title: Comparison of stability of resorbable and titanium fixation systems by finite element analysis after maxillary advancement surgery.
abstract: In this study, three-dimensional modeling and finite element analysis were used to evaluate and compare the stability of Le Fort I osteotomy fixed with titanium and resorbable fixation systems under molar and incisor bite forces. A three-dimensional model of 5-mm advanced hemimaxilla was generated. Contact analyses between the upper and lower segments were prescribed. Two L-plates were inserted on this model via simulation. Displacement, principal stresses, and principal elastic strains were evaluated under 44-N, 125-N incisor and, 250-N molar bite forces. These results suggest that Le Fort I osteotomies fixed with titanium miniplates and screws were stable under all tested forces. However, in resorbable group, under incisor bite forces greater than 44 N, there is a great risk of plate fracture, screw deformation, and/or failure.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Baskent University, Ankara, Turkey.
authors.forename: Sina
authors.initials: S
authors.lastname: Uckan
authors.forename: Firdevs
authors.initials: F
authors.lastname: Veziroglu
authors.forename: Sidika Sinem
authors.initials: SS
authors.lastname: Soydan
authors.forename: Eren
authors.initials: E
authors.lastname: Uckan
mesh_terms: D020341:Absorbable Implants; D000328:Adult; D001672:Biocompatible Materials; D001732:Bite Force; D001860:Bone Plates; D001863:Bone Screws; D002102:Cadaver; D003198:Computer Simulation; D017076:Computer-Aided Design; D055119:Elastic Modulus; D004868:Equipment Failure; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional; D007180:Incisor / Q000502:physiology; D008437:Maxilla / Q000601:surgery*; D008953:Models, Anatomic; D008954:Models, Biological; D008963:Molar / Q000502:physiology; D009984:Orthopedic Fixation Devices; D019340:Osteotomy, Le Fort / Q000295:instrumentation*; D013314:Stress, Mechanical; D014025:Titanium
chemical_list: D001672:Biocompatible Materials; D014025:Titanium