健常永久臼歯の瞬間的咬合力に関する研究
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概要
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The auther measured the co-relative and individual occlusal forces of the dynamic momentary, static momentary and static occlusal forces for 50 males in the twenties with normal teeth, dentition and occlusal relationship, by the use of the occlusal force measuring apparatus with the bite element of 5.25 mm thick developed by the auther. As a result of this studies, the following conclusions were obtained. 1. In terms of the magnitude of co-relative and individual occlusal forces in dynamic momentary and static momentary occlusal forces, the teeth were in this order. They were second molars, first molars, second premolars and first molars. However, in terms of the magnitude of static occlusal forces, the teeth were in this order. They were first molars, second molars, second premolars and first premolars. There was found a significant difference in every occlusal forces between a group of premolars and a group of molars. 2. In terms of the magnitude of three kinds of forces in the same teeth in both co-relative and individual forces, in every teeth except one tooth, the forces were in this order. They were static, static momentary and dynamic momentary occlusal forces. In most cases dynamic momentary forces were equivalent to 35.0〜45.0% of static forces and static momentary forces were equivalent to 45.0〜55.0% of it. Although there was found no significant difference in left first premolars and left second molars between co-relative dynamic momentary and static momentary forces, there was found a significant difference in every tooth between three kinds of occlusal forces in both co-relative and individual forces. 3. When the occlusal forces of the same-named teeth on left and right of the jaw were compared, there was indication that the teeth on the right had greater forces, as against the left teeth in every occlusal forces, but a significant difference was not found between the right and left teeth. 4. When the individual occlusal forces of the upper and lower same-named teeth in three kinds of occlusal forces, there was indication that the lower teeth had greater forces, as against the upper, but no significant difference was found in every tooth between the upper and lower teeth. 5. When the co-relative and individual occlusal forces were compared in each occlusal force, the both were almost the same in magnitude in dynamic momentary forces, and the individual occlusal forces were greater than the co-relative forces in every tooth in static momentary and static occlusal forces.
- 日本補綴歯科学会の論文
- 1971-12-31
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関連論文
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- 健常永久臼歯の瞬間的咬合力に関する研究
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