Under the vertical loading condition, using three-dimension finite element analysis software investigated the stress of natural tooth, nichrome and rhotanium post inlay restoration teeth.
Without assuming the form of unstrained state,the form of unstrained state corresponding to that of pre-stressed state can be obtained through this method directly.
When this method is applied to the spiral bevel gears of an airplane engine, the results show that it is more reasonable than TCA and the precontrol method.