1. Model #8500 Articulator

8/8/2019 1. Model #8500 Articulator

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Model #8500 Articulator


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The Whip Mix Articulator, Model #8500


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Positioning Nasion Relator on crossbar of face-bow.


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QUICKMOUNT Face-Bow inposition on human skull.


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Shows relation of face-bow earpiece to condyle.


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While face-bow is in place, the condylar width is determined by

marking on front of face-bow-medium in this instance.


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Condyle elements are moved to center holes of lower frame to

correspond to themedium registration.


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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.


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The condylar guides are set at 30 angulation in preparation for

receiving face-bow registration.


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The QUICKMOUNT face-bow registration of the maxillary teeth

is locked in position.


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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.


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Holding the face-bow arms firmly in place, the three locking

screws are tightened.


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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.


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


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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.


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When Mounting Stone has hardened, the Incisal guide pin is

replaced in the upper member of the articulator.


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The line that completelyencircles 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.


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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.


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The Incisal Guide Table is then locked into place with the hex

driver used with the face-bow.


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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.


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

contacts the guide pins.


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


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Side view showing position of condyles when mandible is in

centric relation.


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Front view with mandible in left lateral excursion. Wax

registration of this movement is in place between the upper and

lower teeth.


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Left side view with mandible in left lateral excursion, the left

condyle remains in retruded position.


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Right side view at the same time the right condyle moves down

and forward.


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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)


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To set this inclined movement into the articulator, the condylar

guide is rotated downward until it touches the condyle element,

then locked into position.


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The side shift guide is moved laterally until it also contacts the

right condyle elements, and locked into position.


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Slide shift in position.


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Left condyle has moved away from its side shift guide.


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


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In this movement, the right condyle remains in its retruded

position.


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The left condyle moves forward and down.


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This registration is transferred to

the articulated casts and the leftside guidance of the instrument is

adjusted in the same manner as the

right side.


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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.


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With the articulator set at a slightly greater angle than exists in

the skull, this piece is greater on the casts than it is on the skull.


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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)


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View comparing the two while in right lateral excursion.


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Side view of the two while in partial lateral excursion.


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Permanent Incisal guide registration may be obtained by cutting

guide path into plastic Incisal guide block.


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Double exposure, superimposing the lower frame of the articulator,

in corresponding position of the mandible, over the skull.


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With the mandible removed, the skull is set in place onto the

lower member of the articulator.


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With the lower casts mounted on the articulator frame, it

replaces the mandible of the skull.


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Front view of entire articulator with mounting stone in place,

superimposed by double exposure, over skull.


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Front and side views of skull and articulated casts.


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Dentoforms mounted on articulator, showing writing stylus in

place in an attempt to trace articulator movements to compare

different adjustments of the instrument.


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Close-up showing method of mounting ball-point pen refill with self-

curing plastic to allow only vertical movement of the writing pen.


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Flat shim of fused porcelain

was luted to the surface of

ground away lower molar

tooth with tacky sticky wax toreceive ink markings.

With dentoforms in centric

relation, the stylus rests on

the approximate center of thelower left first molar tooth.

Moving the articulator into

right lateral excursion will

draw a line from center tobuccal of tooth.

Left lateral excursion will

mark from center to lingual of

tooth.


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The various paths caused by

changing only the amount of sideshift allowed, as indicated on the

individual slides.


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With amount of side shift constant but changing the condylar

width.


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With no side shift allowed,but again altering the

condylar width.


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Composite of several paths caused by changing the condylar

width and the amount of side shift in various combinations.


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Close-up views of front and bothsides of the articulated casts in

centric relation.


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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.


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No other teeth come close to meeting.


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Setting the inclination to the average 30, the upper right

second and third molar contact the right lower third molar.


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

contact.


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The check bite registration taken from the skull set the condylar

guidance at 42 inclination. At this setting, the molar teeth on

the right side come close into a very light contact.


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While the teeth on the left side are in the best occlusion possible

for these worn teeth.


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With the inclination increased to 60, none of the teeth on the

right side come close to each other.


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While on the left side only the cuspids make contact.


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In an effort to check the authenticity of this 43 setting, a strip

of marking tape was applied to the right side of the skull crossing

the condyle at a right angle to the arm of the face-bow while it

was in place on the skull.


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

condyle.


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The mandible is moved into the left lateral exclusion position.


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A protractor placed in relation to the two ends of the cut tape

indicates 42 . Close up of the protractor straight edge in

relation to the end of the cut marking tape.


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361 Farmington Avenue

P.O. Box 17183

Louisville, Kentucky 40217 USA

Phone: 502-637-1451 Fax: 502-634-4512

www.whipmix.com

Documents

1. Model #8500 Articulator