抄録
It was the purpose of this investigation to study the general stress distribution in the abutment teeth and their supporting tissues of a semi-fixed or a fixed bridge, which was connected with the tilted second molar and second premolar, using three-dimensional photoelastic stress analysis technique.
The following conclusions were obtained;
1. The tilted second molar's supporting tissues were subjected to the mesial stresses of the fixed bridge under load. While they were subjected to the nearly axial stresses of the semi-fixed bridge.
2. The second premolar's supporting tissues were subjected to the mesial stresses in relation to the second molar of the semi-fixed bridge under load.
3. The stress concentrations, which were seen in the cavity floor and distal wall of the tilted molar in the fixed bridge, were favorably altered by the placement of the semi-fixed bridge under load.
4. In the second premolar, there was no difference in the stress distribution between the semi-fixed and the fixed bridge.
