Comparison of Neck Screw and Conventional Fixation Techniques in Mandibular Condyle Fractures Using 3-Dimensional Finite Element Analysis
| Autor: | Cláiton Heitz, Ricardo Augusto Conci, Flavio Henrique Silveira Tomazi, Guilherme Genehr Fritscher, Pedro Yoshito Noritomi, Jorge Vicente Lopes da Silva |
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| Rok vydání: | 2014 |
| Předmět: |
Medullary cavity
Movement Bone Screws Finite Element Analysis Dentistry Biocompatible Materials Models Biological Condyle Fixation (surgical) Fracture Fixation Internal User-Computer Interface Imaging Three-Dimensional Elastic Modulus Mandibular Fractures Deformity Medicine Humans Computer Simulation Titanium business.industry Mandibular Condyle Pterygoid Muscles musculoskeletal system Finite element method Biomechanical Phenomena Fracture Fixation Intramedullary Otorhinolaryngology Surgery Stress Mechanical Oral Surgery medicine.symptom business Bone Plates Fracture reduction |
| Zdroj: | Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons. 73(7) |
| ISSN: | 1531-5053 |
| Popis: | Purpose To compare the mechanical stress on the mandibular condyle after the reduction and fixation of mandibular condylar fractures using the neck screw and 2 other conventional techniques according to 3-dimensional finite element analysis. Materials and Methods A 3-dimensional finite element model of a mandible was created and graphically simulated on a computer screen. The model was fixed with 3 different techniques: a 2.0-mm plate with 4 screws, 2 plates (1 1.5-mm plate and 1 2.0-mm plate) with 4 screws, and a neck screw. Loads were applied that simulated muscular action, with restrictions of the upper movements of the mandible, differentiation of the cortical and medullary bone, and the virtual “folds” of the plates and screws so that they could adjust to the condylar surface. Afterward, the data were exported for graphic visualization of the results and quantitative analysis was performed. Results The 2-plate technique exhibited better stability in regard to displacement of fractures, deformity of the synthesis materials, and minimum and maximum tension values. The results with the neck screw were satisfactory and were similar to those found when a miniplate was used. Conclusion Although the study shows that 2 isolated plates yielded better results compared with the other groups using other fixation systems and methods, the neck screw could be an option for condylar fracture reduction. |
| Databáze: | OpenAIRE |
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