Validating a voxel-based finite element model of a human mandible using digital speckle pattern interferometry |
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| Authors: | F. Gröning J. Liu M.J. Fagan P. O’Higgins |
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| Affiliation: | 1. Department of Archaeology and Hull York Medical School, University of York, York YO10 5DD, UK;2. Department of Computer Science, University of Hull, Hull HU6 7RX, UK;3. Department of Engineering, University of Hull, Hull HU6 7RX, UK;4. Hull York Medical School, University of York, York YO10 5DD, UK;1. Laboratory for the Study of Calcified Tissues and Biomaterials, Faculty of Dentistry, Université de Montréal, Montreal, Quebec, Canada H3C 3J7;2. Union University, Schenectady, NY 12308, USA;3. Department of Biomechanics, Hospital for Special Surgery, New York, NY 10021, USA;4. Division of Plastic and Reconstructive Surgery, Pediatric Surgical Research Lab, Stanford University, Stanford, CA 94305, USA;1. Université de Bordeaux, Institut de Mécanique et d''Ingénierie, CNRS UMR, 5295, Talence, France;2. Biomechanics Research Group, Department of Mechanical Engineering, University of Aveiro, Portugal;1. Medipol Mega Hospital and University, Department of Prosthodontics, Istanbul, Turkey, Istanbul, Turkey;2. Hitit University, Faculty of Engineering, Department of Mechanical Engineering, Corum, Turkey;3. Okan University, Faculty of Dentistry, Department of Prosthodontics, Istanbul, Turkey;4. Istanbul University, Faculty of Dentistry, Department of Prosthodontics, Istanbul, Turkey;5. Istanbul Technical University, Faculty of Mechanical Engineering, Istanbul, Turkey;1. Department of Mechanical Engineering, Changzhou Vocational Institute of Light Industry, Changzhou, Jiangsu, China;2. Department of Mechanical Engineering, Penn State University, University Park, PA, United States;3. Department of Oral Maxillofacial Pathology Medicine and Surgery, Temple University, Philadelphia, PA, United States;4. Department of Orthopaedics and Rehabilitation, Penn State College of Medicine and M.S. Hershey Medical Center, Hershey, PA, United States |
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| Abstract: | Finite element analysis is a powerful tool for predicting the mechanical behaviour of complex biological structures like bones, but to be confident in the results of an analysis, the model should be validated against experimental data. In such validation experiments, the strains in the loaded bones are usually measured with strain gauges glued to the bone surface, but the use of strain gauges on bone can be difficult and provides only very limited data regarding surface strain distributions. This study applies the full-field strain measurement technique of digital speckle pattern interferometry to measure strains in a loaded human mandible and compares the results with the predictions of voxel-based finite element models of the same specimen. It is found that this novel strain measurement technique yields consistent, reliable measurements. Further, strains predicted by the finite element analysis correspond well with the experimental data. These results not only confirm the usefulness of this technique for future validation studies in the field of bone mechanics, but also show that the modelling approach used in this study is able to predict the experimental results very accurately. |
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