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In-vitro results of rapid maxillary expansion on adults compared with finite element simulations |
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| Authors: | Andrew Boryor Ansgar Hohmann Arthur Wunderlich Martin Geiger Fatih Kilic Martin Sander Christian Sander Tobias Böckers Franz Günter Sander |
| Affiliation: | 1. Department of Orthodontics, University of Ulm, 89081 Ulm, Germany;2. Department of Diagnostic Radiology, University of Ulm, 89081 Ulm, Germany;3. Department of Anatomy and Cell Biology, University of Ulm, 89081 Ulm, Germany;1. Research assistant, Department of Orthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey;2. Professor and chair, Department of Orthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey;1. Department of Orthodontics, School of Dental Medicine, State University of New York, Buffalo, NY;2. Health Sciences Library, State University of New York, Buffalo, NY;3. Private Practice, Vernon Hills, Ill;1. Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil;2. Department of Dental Materials and Prosthodontics, School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil;3. Department of Oral Radiology, School of Dentistry, Federal University of Alfenas, Alfenas, Minas Gerais, Brazil;4. Department of Diagnosis & Oral Health, University of Louisville School of Dentistry, Louisville, KY, USA |
| Abstract: | This study was mainly performed to investigate the effects of high maxillary expansion forces on the skull with fresh and thiel-fixed human skulls. The maxillary suture was not weakened except in one experiment. This study compares the strain measured on the zygomatic process of the skull with the results of a finite element model generated for this purpose. An increasing transversal force was applied on the alveolar process (teeth) until rupture. Strain on the zygomatic process, maxilla displacement and the expanding forces were registered.The results of this study show linear material behaviour of the skull before rupture. The highest stress during the experiments and FE simulation was observed on the alveolar process.Conclusions of this study are the necessity of the existence of appropriate models and that female specimens seem to rupture at a lower force than male ones. Both male and female specimens show a similar linear behaviour in the force/strain curve within each gender group. The probability of maxillary suture opening in adults during ultra-rapid maxillary expansion with tooth anchorage is very low. Complications and unwanted rupture could occur. |
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