Try In Flashcards
(31 cards)
Explanation of what to expect
Not real dentures
They are only for looking, not for chewing. (Wax may be a little thicker in
some places for strength and for giving room to polish).
The pattern may not be as retentive as the final dentures (blocked-out).
The gingival color is a pink-tinted wax (Acrylic color can be customized!).
Conformation approach
making the teeth look similar in
size and position
Reorganized approach
making the teeth look
different as requested
Now to record UDO in tryin
Record the VDO by measuring two skin points with a Boley gauge.
Once with existing CDs, and once with wax-ups, then compare!
ALMA gauge records
record the vertical and lateral distance between the
incisor edge and the incisive papilla intaglio in a denture and wax-up.
These measurements allow for comparison and confirmation of tooth
positions.
Alma gauge measuring the anterior height and labial extension of an existing denture.
Speech provides a functional assessment of an acceptable
interocclusal
dimension between the “rest” and “occlusal” positions of the mandible.
Counting through the 50s: “50, 51, 52, etc….”: This labial/dental-formed
sound will assess the
visibility and position of the upper anterior teeth
relative to the lower lip.
Counting through the 60s, “60, 61, 62, etc.”: This lingual/dental-formed
sound will assess th
the position of the upper anteriors to the residual
alveolus
, the appropriate height of the upper and lower anterior teeth, and
the interocclusal airway space.
The sibilant “s” sounds should be clear and crisp (Not crisp?
the upper
anteriors may be too short and/or set too high in front of the residual
alveolus.
Speech assessment:
There should appear to be a slight but obvious
negative space (the closest speaking space) between the upper and lower
teeth during speech. (interincisal vertical separation 1 to 1.5 mm.)
Speech assessment:
There should appear to be a slight but obvious
negative space (the closest speaking space) between the upper and lower
teeth during speech. (interincisal vertical separation 1 to 1.5 mm.)
- If they do not fit the same way, a
a new corrected jaw relation records, tooth
setup, and try-in can be made to confirm the records as accurate before
processing.
(the jaw should arc closed
along the
posterior border of the sagittal Posselt’s diagram (CR!).
The correct occlusion should
The correct occlusion should not shift or move the denture bases !!!!
The correct occlusion should not shift or move the denture bases !!!!
your registration and mounting are inaccurate.
The best result for many of your patients may be a standard setup with a
minimum overbite
Ob 0.5 mm
Oj 1-2mm
Low incisal guidance
Postdamming
If the posterior palatal seal (PPS) area has not been defined at the
impression appointment, it needs to be done now (Postdamming).
This area is modified by scraping a groove 2 mm wide and deep into
the final stone model before denture processing (indents into the soft
tissue). Dr. Shadi prefers the cupid bow scraping!
alteration provides several functions:
it compensates for the slight shrinkage of processed acrylic across the arch of the palate,
peripheral seal is maintained during the slight movements of the denture on mucosa,
posterior border of the denture can maintain adequate thickness for strength and yet
become less noticeable to the patient’s tongue as it blends into the mucosal contour.
The PPS is located and confirmed by various methods:
locating anatomy on the model (a line from hamular notch to hamular notch
through the fovea palatine). P.s. fovea can be anterior, posterior or at ah line
i.e. vibrating line.
observing tissue color difference,
mirror probing to assess tissue resilience and patient tolerance,
observing soft palate movement: To judge the range of movement of the soft
palate, ask your patient to say “Ah, Ah” forcefully several times.
? How long denture soaked for? Patient instructions
Dentures must be soaked in water for 72 hours for proper dimensional
hydration recovery, (or 2 hours by using low pressure water containers).
Patient should be instructed to keep any previous dentures out of the mouth
for 24 hours before the insertion appointment (unhealthy and distorted
tissues affect denture seating= Fit & Occlusion).
Alternatively is to have the existing dentures relined with a soft temporary
material to minimize tissue distortion problems.
Dentures should be inspected digitally and by magnifying loupes:
- tissue surface has no imperfections,
- polished surface is smooth,
- denture flanges have no sharp angles and are not too thick,
- denture borders are round and smooth with no obvious overextension.
Use of pressure-indicating paste (PIP) is essential to
Use of pressure-indicating paste (PIP) is essential to evaluate and improve
the adaptation of the denture to the tissue (mucosa compressibility!):
1. Pressure spots may have been present in the final impression,
2. Processing changes can create a slight contraction of the maxillary denture
base (lateral areas of tuberosity),
3. Bilateral undercuts on the residual ridge,
4. Relief for the thin mucosa over the mylohyoid ridge.
5. Thin mucosa over mentalis and incisive canal nerves.
How to use PIP:
- Dry the denture,
- apply a thin even layer of PIP using a brush with the same direction,
- painted surface may be sprayed with a silicone liquid or wetted with water,
- Carefully seat the denture with firm finger pressure on the first molar areas
(no biting! Occlusion is not completely corrected!). - Remove the denture immediately, inspect the pressure spots and grind.
Adjustment of denture borders
Apply disclosing wax on an incremental dried denture border,
2. Seat the denture firmly with even finger pressure,
3. Instruct the patient to do the necessary border-molding movements,
4. Carefully remove the denture and adjust any visible pressure area or
overextension.
