Articulator Setup Guide

ARTICULATORS
INDIAN DENTAL ACDEMY
Leader in continuing dental education
www.indiandentalacademy.com

The Whip Mix Articulator, Model #8500

Positioning Nasion Relator on crossbar of face-bow.

‘QUICKMOUNT’ Face-Bow in
position on human skull.


Shows relation of face-bow earpiece to condyle.

While face-bow is in place, the condylar width is determined by
marking on front www.indiandentalacademy.com in this instance.
of face-bow-medium

Condyle elements are moved to center holes of lower frame to
correspond to the ‘medium’ registration.

To adjust the upper frame of the articulator to the medium width,
one spacer is removed from the shaft of the condylar guide on
each side.

The condylar guides are set at 30° angulation in preparation for
receiving face-bow registration.

The ‘QUICKMOUNT’ face-bow registration of the maxillary teeth
is locked in position.

Transferring the face-bow registration to the articulator:
• The holes in the earpieces are placed onto the pins extending
from the condylar guides of the articulator.

Holding the face-bow arms firmly in place, the three locking
screws are tightened.

The lower frame of the articulator is used as a support for the
face-bow registration and upper frame of the articulator while
mounting the upper cast.

The upper cast is placed into the registration of the face-bow

While supporting the face-bow fork, the upper arm of the
articulator is brought down until it touches the cross member of
the face-bow.

When Mounting Stone has hardened, the Incisal guide pin is
replaced in the upper member of the articulator.

• The line that completely
encircles the guide pin, when
flush with the top of its
supporting bushing, sets
parallel the upper and lower
arms of the articulator.
• This pin should be set a 5mm
opening in preparation for
mounting lower cast.
• Place round end of pin down
if plastic incisal guide is used.

• If the Adjustable Incisal
Guide is used, the chisel
shaped end of the guide pin
is used.
• The guide is positioned so
that the chisel edge of the pin
rests on the small indentation
in the center of the table.


The Incisal Guide Table is then locked into place with the hex
driver used with the face-bow.

With the articulator inverted and using a centric relation
registration, the lower cast is positioned onto the upper cast and
Mounting Stone applied to the cast and mounting plate.

The lower frame is then pushed into place until the Incisal guide
contacts the guide pins.

Front view of the skull with the two jaws in centric relation.

Side view showing position of condyles when mandible is in
centric relation.

Front view with mandible in left lateral excursion. Wax
registration of this movement is in place between the upper and
lower teeth.

Left side view – with mandible in left lateral excursion, the left
condyle www.indiandentalacademy.composition.
remains in retruded

Right side view – at the same time the right condyle moves down
and forward.

With this same lateral excursion registration transferred to the
articulated casts, the right condyle of the articulator moves down
and forward correspondingly. (Side plate of guide has been cut
away to improve view)

To set this inclined movement into the articulator, the condylar
guide is rotated downward until it touches the condyle element,
then locked into position.

The side shift guide is moved laterally until it also contacts the
right condyle elements, and locked into position.

Slide shift in position.

Left condyle has moved away from its side shift guide.

Front view of the skull with mandible in right lateral excursion.

In this movement, the right condyle remains in its retruded
position.

The left condyle moves forward and down.

This registration is transferred to
the articulated casts and the left
side guidance of the instrument is
adjusted in the same manner as the
right side.

The skull and articulated casts are both in left lateral excursion
position, but with the inclination of the eminentia set at an arbitrary
angle slightly less on the articulator than that of the skull. The second
and third molars of the casts are in closer relationship than are those of
the skull.

With the articulator set at a slightly greater angle than exists in
the skull, this piece is www.indiandentalacademy.com than it is on the skull.
greater on the casts

Front view of articulated casts and skull, comparing the two while
in left lateral excursion. (Settings of articulator are correct as
registered by wax transfers)

View comparing the two while in right lateral excursion.

Side view of the two while in partial lateral excursion.

Permanent Incisal guide registration may be obtained by cutting
guide path www.indiandentalacademy.com
into plastic Incisal guide block.

Double exposure, superimposing the lower frame of the articulator,
in corresponding position of the mandible, over the skull.

With the mandible removed, the skull is set in place onto the
lower www.indiandentalacademy.com
member of the articulator.

With the lower casts mounted on the articulator frame, it
replaces the mandible of the skull.

Front view of entire articulator with mounting stone in place,
superimposed by double exposure, over skull.

Front and side views of skull and articulated casts.


Dentoforms mounted on articulator, showing writing stylus in
place in an attempt to trace articulator movements to compare
different adjustments of the instrument.

Close-up showing method of mounting ball-point pen refill with selfcuring plastic to allowwww.indiandentalacademy.com of the writing pen.
only vertical movement

• Flat shim of fused porcelain
was luted to the surface of
ground away lower molar
tooth with tacky sticky wax to
receive ink markings.
• With dentoforms in centric
relation, the stylus rests on
the approximate center of the
lower left first molar tooth.
• Moving the articulator into
right lateral excursion will
draw a line from center to
buccal of tooth.
• Left lateral excursion will
mark from center to lingual of
tooth.

The various paths caused by
changing only the amount of side
shift allowed, as indicated on the
individual slides.

With amount of side shift constant but changing the condylar
width.


With no side shift allowed,
but again altering the
condylar width.


Composite of several paths caused by changing the condylar
width and the amount of side shift in various combinations.

Close-up views of front and both
sides of the articulated casts in
centric relation.

With the casts forced into left lateral excursion, but with no
angulation of the eminentia, the third molars on the right side are
in heavy contact.

No other teeth come close to meeting.

Setting the inclination to the ‘average’ 30°, the upper right
second and third molar contact the right lower third molar.

The teeth on the left side are much closer, but still no actual
contact.

The “check bite” registration taken from the skull set the condylar
guidance at 42 ½ inclination. At this setting, the molar teeth on
the right side come close into a very light contact.

While the teeth on the left side are in the best occlusion possible
for these worn teeth.

With the inclination increased to 60°, none of the teeth on the
right side come close to each other.

While on the left side only the cuspids make contact.

In an effort to check the authenticity of this 43 ½° setting, a strip
of marking tape was applied to the right side of the skull crossing
the condyle at a rightwww.indiandentalacademy.com the face-bow while it
angle to the arm of
was in place on the skull.

The marking tape was cut in two at point centered over the
condyle.

The mandible is moved into the left lateral exclusion position.

A protractor placed in relation to the two ends of the cut tape
indicates 42 ½°. Close up of the protractor straight edge in
relation to the end of the cut marking tape.

Thank you
Leader in continuing dental education


Articulator Setup Guide

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