Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지

Stress Distribution following Rapid Maxillary Expansion using Different Finite Element Model according to Hounsfield Unit Value in CT Image

CT상의 HU 수치에 따른 유한요소모델을 이용한 RME 사용에 따른 응력분포에 대한 연구

  • Yoon, Byung-Sun (Department of Orthodontic Dentistry, Graduate School, Dankook University) ;
  • Cha, Kyung-Suk (Department of Orthodontic Dentistry, Graduate School, Dankook University) ;
  • Chung, Dong-Hwa (Department of Orthodontic Dentistry, Graduate School, Dankook University)
  • 윤병선 (단국대학교 치과대학 교정학 교실) ;
  • 차경석 (단국대학교 치과대학 교정학 교실) ;
  • 정동화 (단국대학교 치과대학 교정학 교실)
  • Published : 2007.12.30
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Abstract

With rising prevalency of mouth breathing children caused by developing civilization and increasing pollution, there are many maxillary transverse discrepancy patients with undergrowth of maxilla. For improving this, maxillary mid-palatal suture splitting was often performed. The purpose of this study was to analyse the stress distribution on the craniofacial suture and cranium after rapid maxillary expansion by finite element model. The boy(13Y6M) was chosen for taking computed-tomography for finite element model. Three-dimensional model of maxilla, first premolar, first molar, buccal and lingual part of rapid maxillary expansion were constructed. 1. The alveolar bone adjacent to the first molar and the first premolar that was affected directly by rapid maxillary expansion was displaced laterally approximately 4.04mm at maximum. The force decreased toward anterior region and frontal alveolar bone displaced laterally about 3.18mm. 2. A forward maximum displacement was exhibited at zygomatic process middle region. 3. At maximum, maxillary median part experienced 0.973mm downward repositioning and 0.65mm upward repositioning at lateral alveolar bone. 4. Von mises stress was observed the largest stress distribution around teeth and zygomatic buttress. 5. The largest tensile force was observed around alveolar bone of teeth, while compression force was observed at zygomatic buttress.

Keywords

References

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