機能下にある歯がの水平面内における変位に関する研究

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  • A measurement of the physiological tooth displacement in the horizontal plane in function.

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The objective of this work is to investigate the horizontal tooth displacement and the behavior of the interdental proximal contact relation in function. As the transducer, two Magnesensors®were used. The movement of the upper and lower left molars were measured. Based on the results of these experiments, the following conclusions can be made:<BR>1. The upper molars showed the displacement ranging from 10to 146μm in the disto-lingual direction during biting.<BR>2. The lower molars showed the displacement ranging from 16to 109 μm in the mesio-lingual or the lingual direction during biting.<BR>3. The displacement of the lower molars in the mesiodistal direction was less than that of the upper molars. 4. The upper molars showed the displacement ranging from 91to 196 μm in the disto-lingual direction during mastication.<BR>5. In the lingual or the disto-lingual direction, the lower molars showed the displacement ranging from 29 to 55 μm and 56to 73 μm in the buccal or the mesiobuccal direction during mastication.<BR>6. The tooth which has the loose contact showed wider displacement path in the mesio-distal direction during mastication.<BR>7. The dental arch width decreased in function.

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