Mark II Instruction Manual - Whip Mix
Mark II Instruction Manual - Whip Mix
Mark II Instruction Manual - Whip Mix
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VI. MOUNTING THE CASTS IN THE ARTICULATOR<br />
The procedures for constructing casts<br />
are not discussed in this manual. Once<br />
you have obtained impressions of the<br />
upper and lower arches for purposes of<br />
constructing the casts, you will in addition<br />
require four interocclusal checkbite<br />
records in order to mount the mandibular<br />
cast in the articulator and to adjust<br />
the fossa controls of the articulator: a<br />
centric relation record, one right and<br />
one left lateral checkbite record and a<br />
protrusive record. The selection of the<br />
method and material used for obtaining<br />
these records is left to the preference of<br />
the operator. One recommended checkbite<br />
procedure is presented in Appendix<br />
A of this manual.<br />
THE MAXILLARY CAST<br />
First secure the maxillary cast to the bite<br />
fork with sticky wax or with a light elastic<br />
band (fig. 53).<br />
With the mounting plate secured in<br />
the upper bow of the articulator, fill the<br />
mounting plate with stone and also apply<br />
stone to the top of the cast. Be sure<br />
the mounting stone completely fills the<br />
recesses of the mounting plate. The cast<br />
is secured to the mounting plate with a<br />
“one mix” or “two mix” procedure.<br />
“One <strong>Mix</strong>” Procedure Use one mix of<br />
fast set mounting stone to secure the<br />
maxillary cast to the mounting plate.<br />
With a little experience a neat mounting<br />
can be achieved with this technique.<br />
Bring the upper bow down on top of<br />
the cast, so the stone bonds the two<br />
together. Now engage the centric latch.<br />
Throughout this procedure be sure that<br />
the condyles maintain centric relation<br />
and the incisal pin touches the incisal<br />
platform (fig. 54). Once the stone has<br />
set, remove the maxillary cast support<br />
from the articulator.<br />
fig. 53<br />
fig. 54<br />
“Two <strong>Mix</strong>” Procedure Use one mix<br />
of fast set stone to completely fill<br />
the recesses of the mounting plate<br />
and to tack the cast to the mounting<br />
plate. After the stone is set, remove<br />
the mounted cast from the articulator<br />
and use a second mix of fast set<br />
stone to complete the mounting. The<br />
“two mix” procedure is recommended<br />
to easily obtain a neat mounting.<br />
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