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Skeletal Changes Following Application of RME at Different Maturation Stages  

Han, Soon-Ki (Department of Orthodontics, School of Dentistry, Dankook University)
Chung, Dong-Hwa (Department of Orthodontics, School of Dentistry, Dankook University)
Cha, Kyung-Suk (Department of Orthodontics, School of Dentistry, Dankook University)
Publication Information
Journal of Dental Rehabilitation and Applied Science / v.23, no.4, 2007 , pp. 373-384 More about this Journal
Abstract
The purpose of this study was to analyse the stress distribution on the craniofacial suture and cranium after application of RME. Twelve years and six months old boy and twenty years old adult male were chosen for taking computed-tomography for FEM. From DICOM visual information, it was processed by 3-dimensional image construction program Mimics 10.01. Hounsfield unit(HU) which shows gray scale of CT image is picked for revealing mechanical properties of each model. The models have been accomplished with various range of physical properties. After applying 5.0 mm expansion, the maxillary complex model was obeserved for analyzing displacement and stress distribution of the model. The amount of transverse expansion of child and adult maxilla is different according to its location. It appears that it decreases gradually with the distance from separation site. In child, maximum compressive stress located broad area in zygomatic buttress department and the ends of frontal process of maxilla, pterygoid plate, and bones surrounding orbit. However, in adult maximum compressive stress was located smaller area and the stres was higher than child.
Keywords
computed tomography; RME; finite element model; hounsfield unit; stress distribution; expansion;
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