総義歯における人工臼歯の咬合面形態の相違による咀嚼力および咬合力に関する研究 : 第1報 0°咬頭人工臼歯について
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Until the present, artificial teeth that varied form, size and shade are used, and studied in large numbers. But it didn't at the same time biting forces, masticating forces and the electromyography of differences from occlusal form of artificial teeth of complete dentures. By way of finding out how the occlusal form of artificial teeth has a influences upon the masticatory functions of complete dentures, the author uses the semi-conductor apparatus developed by Moriya and Fukamizu. The biting forces, masticating forces and forces in the swallowing period of the upper first molars on the complete denture wears (6 males) from 50 to 60 in age at differences from occlusal form of artificial teeth are recorded at the same time as the electromyography of masseters and temporalis of left and right side. As the result of these efforts, the following conclusions are obtained. 1. The biting forces in upper first molars of the 30 degree cusp teeth are larger than 0 degree cusp teeth. Especially the biting forces of the 0 degree cusp teeth aren't found at eccentric occlusion. 2. The masticating forces in all foods of the 30 degree cusp teeth are smaller than 0 degree cusp teeth, but forces in the swallowing period are larger. 3. As for amount of elcectoric discharge activity of the masseter and temporalis during masticating each foods, 30 degree cusp teeth have a tendency to be small quantity to 0 degree cusp teeth. 4. Interval of electric discharge activity of masseter and temporalis aren't found difference between each teeth, but as for the duration, term and proportion of duration to term, 30 degree cusp teeth have a tendency of to be small to 0 degree cusp teeth.
- 社団法人日本補綴歯科学会の論文
- 1978-02-25
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