Abstract
The stress distribution in a tooth is analysed numerically by considering both fixed prosthetic appliance and core simultaneously. This analysis is done by use of the finite element method and by taking account of the sustaining rigidity of neighboring teeth. As result of this analysis, the following points are clarified:
1) The stress values in the dental model as an object of study decrease as a whole under the influence of the sustaining rigidity of neighboring teeth. Furthermore, these values decrease when the horizontal component of load is applied to the dental model.
2) As the position of contact with a neighboring tooth moves to the root, the stress values increase generally and the horizontal components of principal stresses become larger.
3) When core is constructed by use of rigid materials such as metal or ready-made pin, the stress values in core increase, while those in the remnaud dentine decrease. On the other hand, when core is constructed by use of soft materials such as resin, the stress values in core decrease, but those in the remnant dentine increase.
