| Project/Area Number |
06557114
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
矯正・小児・社会系歯学
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| Research Institution | Showa University |
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Principal Investigator |
SHIBASAKI Yoshinobu Showa University, Dentistry, Professor, 歯学部, 教授 (40014005)
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| Co-Investigator(Kenkyū-buntansha) |
OHTSUKA Sumimasa Showa University, Dentistry, Assistant Professor, 歯学部, 助教授 (80129816)
MAKI Koutaro Showa, University, Dentistry, Lecturer, 歯学部, 講師 (80219295)
鐘ヶ江 晴秀 昭和大学, 歯学部, 講師 (90119173)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 1995: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1994: ¥3,500,000 (Direct Cost: ¥3,500,000)
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| Keywords | Cleft Lip and Palate / Maxillofacial complex / Scar tissue / 3DCT / FEM / 口唇裂口蓋裂 / バイオメカニクス / CT / 骨密度 / 三次元画像 |
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| Research Abstract |
The maxillofacial complex and its mechanical behavior in unilateral cleft lip and palate (UCLP) after palatoplasty was analyzed with the three-dimensional finite element method (FEM) . The study examined cross-sectional date sets of affected and control aged 7 to 15 years. Bone density measurement and its three-dimensional distribution was observed beforehand of FE modeling. The data from CT scanning was fed into computer graphic system and then the three-dimensional structure and density value were used as the geometrical information from several patient. Individual dento-maxillofacial skeleton was described on the three-dimensional and rectangular finite elements. The advantage of this FEM is that the evaluations are not dependent on the selected reference plane such as Cephalometrics and mechanical environment derived from various treatment technique is realized. From the analytical results, stress generated by the scar tissue was observed on the distal surface of maxilla and zyogomatics. Also stress generated by lateral expansion and maxillary protraction was observed on the buccal surface of maxilla above the molars. However, slight differences were observed on several patients. These findings suggested that the dramatic deformation associated with palatoplasty and the effect of treatment were related to the bone structure and mechanical properties in maxillofacial skeletons.
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