| Project/Area Number |
04454480
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
補綴理工系歯学
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
WATANABE Makoto Dept. of Geriatric Dent., Tohoku Univ. School of Dent. Professor, 歯学部・高齢者歯科学講座, 教授 (80091768)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 1993: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1992: ¥4,100,000 (Direct Cost: ¥4,100,000)
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| Keywords | Bite Registration / Hydraulic Jack / ENG Biofeedback / Vertical Dimension / Blood Pressure |
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| Research Abstract |
Bite registration is one of the most important processes in complete denture prosthodontics. However, the registration method in objective and reproducibility of vertical dimension have not yet been established. I attempted the bite registration using patients' sensory function and studied it's sensitivity to the vertical dimension. As this result, it is necessary to consider distribution of occlusal pressure in mucosal surface of the denture base during bite registration. In this study, I developed a three points contact hydraulic jack in order to determine vertical mandibular position giving constant occlusal pressure to the mucosal surface of denture base. And it was objective to verify psychophysically the clinical availability of the bite registration using this jack together with the EMG biofeedback as the horizontal mandibular position application. Two normal subjects were employed in this study and verified the optimum vertical dimension with a changed in vertical dimension with a three point contact hydraulic jack. We compared and studied the two subjects during tapping trial, and clenching one to activate the sensory system of mucosal surface of the denture base. The results of this study are as follows : 1) It was able to determine optimum vertical dimension during bite registration with a three point contact hydraulic jack. 2) This method showed better accuracy in medium clenchingtrial. 3) This method showed enough reproducibility clinically. 4) It is indicated with high clinical availability because of system simplicity, and excellent reproducibility of its result.
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