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a
b
c
d
Fig. 14.8 3D model with external tilt angle of teeth installation line for: a block 1 at lower prosthesis,
b block 1 at upper prosthesis, c block 2 at lower prosthesis, d block 2 at upper prosthesis
The stress intensity is lower for the case of oral tilt angle compared to oral shift of
teeth installation line. In the case of loading at block 2, the stress intensity is lower
compared to the block 1 configuration. The stress distribution is discreet with local
maximum at the loaded teeth locations. The lower prosthesis basis has higher stress
intensity.
The results for the external tilt angle are presented in Fig. 14.8. The found tendency
for the oral tilt angle configurations keeps the same for the external case. However,
the stress intensity is lower, compared to the previous problem. Thus, the oral tilt
angle configuration is more critical for structural integrity of the prosthesis basis
compared to the external one. However, the role of title angles is lower compared to
the shift of teeth installation line.
14.5 Conclusions
The simple models of upper and lower laminar prosthesis basis are presented for the
applied problems. The physically based boundary conditions are introduced. The role
of teeth installation line shift and tilt angle is studied. It is shown that the loads at the