192
S. D. Arutyunov et al.
The results of the calculations are presented for only the critical cases. The stress field
is normalized by the maximum stress level found for a given configuration. Based
on the obtained results, the external shift of teeth installation line is more critical for
the case of lower prosthesis basis. The area of elevated stress is localized at the face
part of the prosthesis. The area of high stress is vast, and the significant stress level
can be found up to molars. In the case of upper prosthesis, the areas of elevated stress
are fragmental. The local area can be found at the tip of the artificial notch and at the
location of first block. A general stress distribution is less intense at the face part of
the prosthesis.
In the case of loading at the block 2, the stress state is comparable for lower and
upper prosthesis basis. The stress distribution has a fragmentary shape with local
maximums. For the both cases, the high stress level is found at the teeth of block 2
and its vicinity. In the case of loads at block 2, the stress state for the lower prosthesis
basis is still higher.
The similar results were obtained for the case of oral shift of the teeth installation
line, Fig. 14.6. In the case of oral shift of the teeth installation line, the stress intensity
is lower compared to external case. The locations of maximum stress remain similar.
a
b
c
d
Fig. 14.6 3D model with oral shift 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
S. D. Arutyunov et al.
The results of the calculations are presented for only the critical cases. The stress field
is normalized by the maximum stress level found for a given configuration. Based
on the obtained results, the external shift of teeth installation line is more critical for
the case of lower prosthesis basis. The area of elevated stress is localized at the face
part of the prosthesis. The area of high stress is vast, and the significant stress level
can be found up to molars. In the case of upper prosthesis, the areas of elevated stress
are fragmental. The local area can be found at the tip of the artificial notch and at the
location of first block. A general stress distribution is less intense at the face part of
the prosthesis.
In the case of loading at the block 2, the stress state is comparable for lower and
upper prosthesis basis. The stress distribution has a fragmentary shape with local
maximums. For the both cases, the high stress level is found at the teeth of block 2
and its vicinity. In the case of loads at block 2, the stress state for the lower prosthesis
basis is still higher.
The similar results were obtained for the case of oral shift of the teeth installation
line, Fig. 14.6. In the case of oral shift of the teeth installation line, the stress intensity
is lower compared to external case. The locations of maximum stress remain similar.
a
b
c
d
Fig. 14.6 3D model with oral shift 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