11
Underhand Pull Grasps
To effect a left lateral mandibular move-
ment the upper bow is moved to the
right and pressure is applied with the
left thumb to insure that the right orbit-
ing condyle maintains contact with its
superior and medial fossa walls and the
left rotating condyle maintains contact
with its superior and rear fossa walls
(fig. 14).
Underhand Protrusive Grasps
(Protrusive Push Grasp)
To effect a straight protrusive movement
the upper bow is moved straight poste-
riorly with the right hand and the left
thumb is used to apply downward pres-
sure on the back of the upper bow so
that the condyles maintain contact with
their superior fossa walls.
The overhand grasps as contrasted
from the underhand grasps are also
useful in manipulating the articulator
and are required to efficiently set a fully
adjustable articulator to a pantographic
record. Figure 15 illustrates the
Overhand Push Grasp; fig. 16 the
Overhand Pull Grasp, and fig. 17 the
Overhand Protrusive Grasp. When
employing the overhand grasps to
manipulate the articulator be sure to
apply pressure to the back of the articu-
lator to insure that the condyles main-
tain contact with their respective fossa
bearing surfaces.
fig. 14
fig. 15
fig. 16
fig. 17
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