Gnathology is concerned with the correlation 

between the ACLU cell services of the teeth and 

the pattern of job open as dictated by the 

temporal mandibular joints and 

modified by the inside cell guidance.

The a crucial scheme should allow mandibular 

movement to occur without tooth interference.

When an a crucial disharmony does exist,

it can cause a collision between opposing teeth.

Such an interference transmits direct trauma to 

the temporal mandibular joint.

As illustrated here 

also,

apparent impulses arise from the teeth and joint.

They trigger a neuro muscular self 

protective feedback mechanism,

which sends different impulses to the muscles of 

mastication to alter the pattern of jaw 

movement.

This alteration attempts to avoid the 

noxious tooth contacts in order to 

prevent the direct trauma to the teeth and joint.

However,

the more seriously a crucial interference and the 

more complex the neuro muscular avoidance 

pattern.

The greater the tendency to develop symptoms of 

temporal mandibular pain dysfunction.

For diagnostic and corrective procedures 

we must record the unaltered pattern 

of jaw movement.

This is accomplished by bypassing the 

teeth,

registering the patient's border movements and 

reproducing these movements on an an atomic 

articulator.

This film demonstrates two methods of recording the 

patient panta graphic technique and 

the engraving technique.

These procedures will be accomplished in such a manner 

as to allow a comparison of their results 

during the pata.

Graphic recording the patient's head is supported by 

the dentist's left arm while he 

depresses the valve to activate the style I 

the patient is passively guided through all of the border 

excursions.

Notice the finger support of the go neal angle 

the mandible is always guided from pro truce if to 

terminal hinge position before any of the 

lateral excursions are recorded 

after the recordings have been made,

they are covered with a transparent tape and the 

graphic display is rechecked for accuracy of the border 

movements.

Again one hand is used to support the 

head while the other hand guides the 

jaw through the border excursions.

A close up view of the left posterior 

recording plates shows the right lateral 

movement,

then the pro truce of movement and 

then the right lateral movement.

Again 

the interior recording presents the typical gothic 

arch display.

The lateral excursions are repeated several times to 

verify the accuracy of the recordings.

Vice locks are placed in position on the 

crossbars 

to index the pantagraph.

The mandible is held in terminal hinge position,

and paper cups filled with bite stone are placed 

over the vice locks.

The locked pantagraph with its extra oral three 

dimensional graphic recordings is separated 

from the clutches.

In preparation for making the intra oral three 

dimensional engrave recordings.

Patient practices the required movements.

Firm pressure is applied to aid in 

developing the effect of the Bennett movement.

It is important that the patient be well 

rehearsed.

The recording discs have been modified to be incorporated 

within the clutches.

Also shown are the four cutting studs and the central 

bearing screw.

This central bearing screw is adjustable for vertical 

clearance.

It produces the classic arrowpoint tracing on 

the upper disc.

When the recording material of auto problem arising 

Rosin is placed on the lower disk.

It will be shaped by the maxillary cutting studs.

The recording material has been placed on the mandibular 

disc and both clutches are seated in the 

mouth.

The patient is guided to closure,

displacing some of the excess of the recording 

material.

The clutches are rechecked for separation and 

stability.

The patient is guided from pro truce if to terminal 

hinge position before any of the lateral 

excursions are developed.

Then the patient is guided through the lateral border 

positions and is allowed active 

movement to develop the full extent of border 

movements and the horizontal range of 

motion.

Firm pressure is used to engrave the effect of 

the side shift.

These procedures are repeated during a period of two 

minutes 

after this initial engraving,

the clutches are removed so the excess 

bulk of material can be trimmed away.

Lastly additional movement is allowed to refine the 

details of the recordings.

The diamond shaped engravings include the effect of the 

Bennett movement as shown in 

detail in this close up view.

The engraved recordings are maintained in centric 

relation and they are transferred from the mouth by 

means of an axis orbital face bowl record.

The centric relation records must be made by using 

an acceptable method.

The final patient record is a second axis 

orbital transfer.

This will be used to mount the maxillary cast in the 

articulator.

The TMJ face bow is attached 

to the transfer fork.

The first face bowl record with the 

clutches attached is transferred to the TMJ 

articulator.

This is stabilized by a rubber band.

The upper member of the articulator is placed in 

position.

The inside cell pin has been removed so the 

orbital level will rest upon the orbital pointer.

The recording.

This will be looted to the articulator with bite 

stone.

The consular heads of the vertical posts 

are covered with a layer of graphite by 

rubbing a soft lead pencil against them.

The upper member of the articulator is carefully 

replaced.

This produces a graphite mark on the 

M.

In intial blanks at the terminal hinge position.

Also the upper member is moved through the 

entire range of motion dictated by the 

engravings.

Additional points of contact have been disclosed.

Their location is outlined with a pencil.

The M initial blanks are removed from the 

instrument and the excess plastic is trimmed away 

to the pencil marks.

The terminal hinge points must be left intact 

as they maintain the accuracy of the recordings.

All interfering contacts are removed.

The M.

Initial blanks are replaced in the articulator 

and the instrument is run through the entire range of 

motion to verify that there are no points of 

contact except the original terminal 

hinge points.

Auto problem arising.

Rosin has been mixed and placed on the evidential 

blanks.

The upper member is returned to the instrument,

which is then opened and closed to establish a 

hinge movement 

with the recording disc held in contact.

The articulator has moved through all of the engraved 

areas to produce the full extent of 

movement recorded from the patient.

This motion of the articulator is the 

analog of the patient's jaw movement,

which is being duplicated as an effect of the engraved 

recordings.

The eminences demonstrate the terminal Hinze 

centric whole point showing through 

their custom form shapes have been determined by the 

articulator movements which were controlled by the 

engraved recordings.

When the engravings are removed from the articulator,

these eminences will dictate the same movements.

Mhm.

An experiment is used to demonstrate the validity of the 

engraving technique.

The TMJ articulator whose controls 

have been determined by the engraved recordings 

will be manipulated to determine its 

ability to duplicate the jaw motions as 

recorded by the pantagraph IQ procedure.

The panda graphic recording is attached to the 

articulator by means of the clutches.

The vice locks are removed to free the maxillary and 

mandibular members from each other 

to manipulate the articulator.

The left hand is placed on the upper member.

This provides stability and is necessary to 

affect the pro truce it and side shift movements.

The right hand moves the inside cell guide pin.

A characteristic of most pathologic 

instruments is that they require time 

consuming mechanical adjustment of the fossa 

elements.

This has been eliminated by the custom form face.

I 

note how the style I follow precisely.

The pantagraph IQ tracings is shown here on the right 

posterior recording plates.

The articulator movement is dictated by the custom 

formed eminences whose shapes were 

determined by the engraved recordings.

Similarly on the left posterior 

recording plates.

The style I tracked the pantagraph recordings 

exactly 

also on the interior recording plates.

The stylist tracks the panda graphic,

tracing 

a sectional view of one of the feminine Shal elements 

shows how the custom form face.

I determined the articulator movement.

A direct comparison of the graphic and engraved recording 

shows the right lateral left lateral 

and produces recordings as accomplished by each 

method.

Both procedures also incorporate the Bennett 

shift and include the entire range 

of motion.

The maxillary cast is transferred to the 

articulator by means of the second 

axis orbital face,

bow transfer,

record 

the mounting of the mandibular cast is accomplished by use of 

the previously registered wax check bites.

The articulator can now be manipulated to 

allow a crucial analysis of the patients mounted 

diagnostic casts,

notice the A kruzel interference in terminal 

hinge closure.

The articulator has also moved through lateral 

excursions to check for working and 

balancing interferences.

These mounted diagnostic casts will duplicate the 

patient's jaw movements.

This is due to the accuracy of the engraved recording 

technique,

which was used to determine the custom form 

shapes of the m initial elements 

which control the articulator movement.

Once the patients,

the clues and interference are identified,

appropriate treatment can be instituted