Functionally generated path occlusion final/ cosmetic dentistry training

OCCLUSION:
Occlusion is defined as any contact
between the incising or masticating
surfaces of the maxillary and mandibular
teeth- GPT.
Dental articulation:
Dental articulation is defined as the
static and dynamic contact relationship
between the occlusal surfaces of the teeth
during function.
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FIXED PARTIAL DENTURE
OCCLUSION:
1.CANINE PROTECTED OR
MUTUALLY
PROTECTED OCCLUSION.
2.GROUP FUNCTION OCCLUSION.
3. FUNCTIONALLY GENERATED
PATH
OCCLUSION(FGP)

INDIAN DENTAL ACADEMY
Leader in continuing dental education
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Meyers first described this
method in 1933, as a means of
obtaining the “Functional Occlusal
path” for bridges fabricated by a
direct/indirect technique and for
dentures.

1.Functionally generated path relies on recording in
a simple precise manner the pathways traveled by
the cusps in the border movements of the
mandible.
2.Wax is adapted over the occlusal surface of the
prepared tooth.
3.The patient occludes the teeth in the intercuspal
position and moves the mandible through all
excursions .

The tips of the opposing cusps act as
recording styli that carve a record of the
border movements in all mandibular
positions.
Stone is brushed and poured into the wax
record to produce functional core.
This functional stone core is then used in
the fabrication of posterior tooth restoration.

PROCEDURE FOR THE FABRICATION OF
FUNCTIONAL CORE FOR FIXED
PROSTHODONTICS :
( Functional index or Counter die)
• The working side tooth contacts is evaluated to
determine whether they form a mutually protected occlusion
(canine guide occlusion) or unilaterally balanced (group
function) occlusion, which is essential in determining the type
of occlusal scheme to be produced in the final restoration.

The preparation for the
cast restoration is started by
doing the occlusal reduction.
Before preceding on to
the axial reduction the functional
tracings are made.

Petrolatum is applied to the
occlusal surface of the opposing
quadrant and cavity varnish is
applied to the occlusal surface of
the prepared tooth to help the
wax to adhere more securely.
A piece of wax is cut in a square slightly larger than
the occlusal surface of the teeth being restored.
While the varnish on the occlusal surface is still tacky
and the wax is soft, attach the wax is to the tooth being
restored.

The patient is guided
into a retruded closure in
centric relation. Then
patient is guided through
all excursions, moving
first into the working side
.
From working excursion,
the patient is guided
back to centric relation
and then into a
nonworking movement.

Have the patient return again
to centric relation and then to
protrusive.
The patient should be guided
through combination movements as
well : working protrusive and non
working protrusive .
Finally the patient should just
“mill around” to ensure adequate
clearance

TO OBTAIN THE FUNCTIONAL CORE.
A tray of some sort should be used to hold the stone in
place in the mouth to make the functional core.
Tongue blades and denture tooth cards can be
employed for this purpose, but a functional index tray can
also be used.

The wax is painted with a die lubricant to reduce
surface tension and ensure a smooth, complete functional
core.
A creamy mix of mounting stone is painted on the
surface of the functional wax tracing with a brush
The functional index tray is loaded with a layer of
mounting stone
Position it on the occlusal surface of the quadrant so that it
covers at least one tooth on each side of the prepared tooth.

When the stone has set, it is removed carefully and
examined for bubbles or voids .
This stone replica of the movement of the cusp tips is
called the functional core. It is also referred to as the
functional index or counter die.
The rest of the tooth preparation is completed and
an impression of the quadrant is made .

Other Instruments that can be used are
1.The verticulator is another instrument that that
can be used for the functionally generated path
technique.
2.A plane line hinge articulator can also be used
for this purpose.

ADVANTAGE
S:1. FGPT eliminates the need for adjusting articulator
with interocclusal records or a tracing device
2. The excursive movements produced in the mouth are
more accurate than those in an articulator.
3. It eliminates the need of face bow transfer.
4. Is simple and can produce precise excellent results.

DISADVANTAGES:
1.The occlusion in one of the arches must be
complete before functional generated path can
be developed.
2.This cannot be effectively utilized for CD
opposing RPD.
3.Verification of record in mouth is difficult.

Summary
1. The method of interocclusal registration using the
articulators is time consuming, expensive and technique
sensitive.
2. Whereas in the FGP technique dynamic and static
relations are reproduced directly in the mouth
3. The technique has the advantage of permitting simple,
inexpensive instrumentation for restoration of teeth.
4. It demands a minimum of chair time, especially during
the try in and cementation phase.

Thank you
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Functionally generated path occlusion final/ cosmetic dentistry training

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