87
BTS
Biomedical
BTS
TMJOINT
guide to the report data reading
The two horizontal dark gray lines with dots, superimposed to dental
arch, represent the BAR value equal to 100%, while the gray bands
represent the normal range up to 90%.
The two targets will be translated at a distance from the relative horizontal
line of a value corresponding to the BAR index calculated, upwards
or downwards following the prevalence of the BAR index (anterior or
posterior), according to the occlusal condition.
The value and the direction of the vertical displacement of the two target
points are then exactly the same.
The BAR value in the normal population always expresses a
prevalence of differential activities of the couple of masseter
muscles compared to that of temporal.
This condition is reversed in the second skeletal class in which
the temporal muscles always express a differential electrical
activity greater than the masseter’s one.
• TORS: torsion
It provides an estimate of the rotation attitude of the mandible in the
horizontal plane when it is in occlusion with the superior maxilla. Is
obtained from the comparison of the torque moment of the right
temporal and the left masseter couple (by convention rightward torque)
with the torque moment of the left temporal with the right masseter
couple (by convention leftward torque).
When this index is >90%, torque moments do not occur on the mandible.
On the contrary, if this index is outside of the normal ranges that means
below 90%, the muscles tend to twist the lower jaw to the right or left
depending on whether one or the other muscular couple prevalence, due
to the presence of occlusal fulcrums.
Содержание TMJOINT
Страница 1: ...version 3 0 0 user manual english BTS TMJOINT ...
Страница 2: ...Document Number ERTMJ 00998 04 Published January 2013 Copyright 2010 2013 BTS SpA All Rights Reserved ...
Страница 6: ......
Страница 104: ......
Страница 119: ......