title: Biomechanical evaluation of maxillary Lefort Ι fracture with bioabsorbable osteosynthesis internal fixation.
abstract: The aim of this study was to apply biomechanical analysis model to evaluate the effects of bioabsorbable internal fixation devices on maxillary Lefort Ι fracture. CT scan technology and the finite element software (ansys) were used to establish three-dimensional finite element models of five resorbable internal fixation devices in maxillary Lefort Ι fractures. We used the model to calculate the stress of the upper jaw and internal fixation. We further analyzed the stability of fixation under four occlusions. The fixation using two bioabsorbable plates was not stable. The zygomaticomaxillary pillars fixation is more stable than other fixations. The stability of fracture fixation was influenced with the molar occlusion. The current study developed a functional three-dimensional finite element model of bioabsorbable internal fixation and compared the stability of five fixation methods for maxillary Lefort Ι fractures. The results would facilitate the application of bioabsorbable materials in dental clinic.
authors.affiliation: Department of stomatology, Tianjin medical university general hospital, Tianjin, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Jiang
authors.initials: J
authors.lastname: Zhou
authors.forename: Chong-Tao
authors.initials: CT
authors.lastname: Xu
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Yan-Jiao
authors.initials: YJ
authors.lastname: Jin
authors.forename: Geng-Lin
authors.initials: GL
authors.lastname: Sun
mesh_terms: D020341:Absorbable Implants; D001696:Biomechanical Phenomena; D001860:Bone Plates; D001863:Bone Screws; D003766:Dental Occlusion; D004867:Equipment Design; D020342:Finite Element Analysis; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D016268:Internal Fixators; D008297:Male; D008437:Maxilla / Q000601:surgery; D008440:Maxillary Fractures / Q000601:surgery*; D008954:Models, Biological; D011091:Polyesters / Q000737:chemistry; D011446:Prospective Studies; D013314:Stress, Mechanical; D013499:Surface Properties; D036542:Tomography, Spiral Computed / Q000379:methods; D015050:Zygoma / Q000601:surgery
chemical_list: D011091:Polyesters; C033616:poly(lactide)
keywords: bioabsorbable materials; finite element; internal fixation; maxillary fractures