| Project/Area Number |
07672207
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Tohoku University |
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Principal Investigator |
KAWAUCHI Mitsuhiko School of Dentistry, Tohoku University Lecturer, 歯学部, 講師 (30195044)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000)
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| Keywords | wireless / Telemeter / Dento-Palatography / Analog Inclination meter / Tongue contact pattern / Head posture / Openbite / Orthognathic surgery / データベース |
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| Research Abstract |
Malposition of the tongue is recognized as a possible cause of malocclusions, yet there has been no optimal system to measure its position and movement for long hours during daily activities.
A wireless telemeter system was developed in order to measure the tongue position and head posture for long hours in natural condition by using Electro Dento-Palatography and Inclination meters.
The subjects were consisted of female adults with Normal occlusion (N-group) and the female patients with mandibular prognathism with anterior Openbite (O-group). The contact position of tongue and the head posture were measured in both groups during reading and walking by using of this system. Data obtained from both groups were compared and the results were as follows :
1. The contact area of tongue of the O-group was larger than that of the N-group.
2. Average head inclinations in sagittal and frontal planes were not significantly different in two groups.
3. Great degree of head flexion corresponded to a larger contact area of the tongue.
4. Relapsed case showed larger contact area of tongue compared with stable case after surgery.
5. This system was applicable to measure tongue position and head posture for long hours without interfering with the subjects' daily activities. Using this system, it was possible to demonstrate relationship between tongue position and head posture in normal occlusion and mandibular prognathism with anterior openbite.
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