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Effects of different types of maxillary protraction on maxilla with finite element analysis

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Effects of different types of maxillary protraction on maxilla with finite element analysis (18.45Mb)
Tarih
2021
Yazar
Büyükçavuş, Muhammed Hilmi
Kale, Burak
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Özet
Objective: To compare two different skeletal anchorage methods with finite element analysis in the treatment of Class III patients with maxillary retrognathia. Material and Methods: Two different treatment scenarios were performed on skull model obtained from computerized tomography images of skeletal Class III patients with maxillary retrognathia and finite element analysis was performed. In the first group; mini plates were simulated on infra zygomatic crest. A unilateral 500 g protraction force was applied to the face-mask. In the second group; mini plates were simulated in infrazygomatic crest and mandibular symphysis. Then, 500g protraction force was applied with Class III elastic between the miniplates. Von Misses stresses and displacement values were evaluated comparatively. Results: In Class III elastic group, maximum Von Misses stress occurred around infra zygomatic crest and symphysis anchored with 0.078 MPa. The maxillary posterior region and paranasal regions were the areas showing the highest Von Misses tension after infra zygomatic crest and symphysis. In the face-mask group, the most common site of Von Misses stress in nasomaxillary complex and alveolar structures were infra zygomatic area where plaques were applied, followed by pterygomaxillary suture. Tensile forces are reduced especially in these two areas by spreading to surrounding structures. Conclusion: In both methods, it was determined that the amount of force transmitted to circumaxillary sutures was sufficient to induce the formation of osteogenesis in these regions.
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http://hdl.handle.net/20.500.12566/1101
Koleksiyonlar
  • Ortodonti / Orthodontics

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