| Project/Area Number |
11470449
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
矯正・小児・社会系歯学
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| Research Institution | Niigata University |
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Principal Investigator |
HANADA Kooji Niigata University, Faculty of Dentistry, Professor, 歯学部, 教授 (90013979)
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| Co-Investigator(Kenkyū-buntansha) |
TERADA Kazuto Niigata University, Dental Hospital, Associate Professor, 歯学部・附属病院, 助教授 (00139312)
MORITA Shuichi Niigata University, Faculty of Dentistry, Associate Professor, 歯学部, 助教授 (60157899)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2000: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1999: ¥13,800,000 (Direct Cost: ¥13,800,000)
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| Keywords | orthodontic treatment / prediction on treatment / clinical evaluation / three-dimensional analysis / prediction on the face |
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| Research Abstract |
The purpose of the present study was to evaluate change relation between hard tissue and soft tissue with orthodontic treatment and growth and to develop the algorithm of predicting system on the face after orthodontic treatment.
1. Changes of the hard tissue and the soft tissue with orthodontic treatment
The error by the superimpose on posterior-anterior cephalogram could objectively be analyzed by correcting with lateral cephalogram. As the results, the dentofacial structures could be accurately superimposed before and after treatment.
2. The analysis of the growth aspect on dentofacial structures
The growth aspects of skeletal Class III and Class I were analyzed as a structural problem. As the results, thin mandibular ramus at the Dental Age IIIA on the skeletal Class III cases became remarkable at the Dental Age IIIC.Similarly, the condyle in the skeletal Class III cases were remarkably lengthened at the Dental age IIIA to IIIC than in the Class I.And gonial angle were remarkably opened on the skeletal Class III than Class I.
3. Three-dimensional surface changes on the face after orthognathic treatment
By fixing the head of the subjects in the ear rod, the shape of the surface could be measured at the good accuracy. By this method, the change of the surface on the face was examined after advance of maxilla. As the results in the middle area upper part between ectocanthion and alare, there was no change. Noses were moved upward and forward after the operation. As the results, the tendency as a form with the flat and wide nose was recognized.
4. The development of algorithm of predicting system on the face after orthodontic treatment
The correspondence of many items for the orthodontic treatment was examined. The algorithm of the prediction of the face after the orthodontic treatment was developed. The accuracy is improved, by repeating examination, prediction, treatment and evaluation.
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