4
Using the occlusal plane as a
reference plane
When positioning upper cast and
wax occlusal rim with the occlusal
plane as a reference plane, the ideal
arch for the upper anterior teeth and
the median line should be matched
with upper labial side and median of
the wax rim.
Based on one of the reference lines
selected among S, M and L for
posterior wax rim, the buccal side
of wax rim should be symmetrically
positioned. Check the position of the
wax rim from above and behind.
5
Positioning the wax rim based
on the mean value of natural
head posture
When applying the mean value of
natural head posture to position
the wax rim, the occlusal plate is
used. In this case, beading wax is
used to raise the distobuccal cusps
of the upper second molars about
7mm higher than the occlusal plate,
to make the occlusal plane angle
approximately 10 degrees.
6
When the median lines of the
articulator and the upper cast have
been matched to mount the cast,
arrangement of the upper central
incisors can be checked with the
incisal indicator. (Prior to checking,
the incisal indicator should be
pointed in the median direction using
the occlusal plate).
14
