抄録
In this investigation, functional displacement of upper and lower molars were revealed using the displacement transducer type M-3. This transducer was invented by Miura in order to reveal three dimensional tooth displacement.
The results were as follows:
1. In general, each upper molar moved in the apical palatal direction while each lower molar moved in the lingual direction.
2. For each upper molar, the amount of displacement varied proportionally depending on the clenching force. The direction of displacement was towards the palatal side.
3. For each lower molar, the amount of displacement varied proportionally depending on the clenching force. The direction of displacement was to the lingual side.
4. The amount of displacement depending on the clenching force was larger in each upper molar than that in each lower molar.
5. It was suggested that the relative position of the upper and lower molars and the relation of their occlusal contacts at the intercuspal position vary depending on the clenching force.
