Posterior palatal seal
What are the 2 components involved in maxillary denture retention? (i.e. What helps the maxillary denture resist movement AWAY from the tissue surface?)
1. adhesion/cohesion forces
2. negative atmospheric pressure
What is the purpose of both maxillary and mandibular canine eminences?
lip support and contour
What is the 1st thing to check at the wax try-in appointment?
the occlusal relationship (occlusion in the mouth must duplicate what is on the articulator)
____ is used to detect improper adaptation of the denture base (ex. painful pressure areas)
PIP (zinc oxide)
2; smooth contours
What are the functions of the PPS?
- stability and retention (maintain contact with the anterior portion of the soft palate)
- prevent gagging
- tissue compressibility (reduce food accumulation)
- compensation for the effects of polymerization shrinkage
When festooning a maxillary complete denture, scalloping the 1st premolar region serves what purpose?
forms the buccal groove which improves the seal and allows more space for the cheek
What is the final step in denture wax-up approval process?
obtain patient acceptance/approval
What are the common sites of discomfort in dentures?
- frenum areas
- bony spicules
- incisive papilla
What is the purpose of creating a neutral zone in a complete mandibular denture?
creates a space for the tongue and aids in retention
What is the most common cause for poor PPS that results in difficult/painful swallowing?
over-extension (hamuli are covered by the denture base)
What are the benefits of festooning?
- improved esthetics
- provides support and contour of the lips and cheeks
- facilitates stability and control of the denture
- affects speech
- prevents chronic biting of lip or cheek
- improves tolerance and comfort
In order, what are the steps of occlusal relationship verification and adjustment?
1. confirm MMR
2. verify VDO and interocclusal distance
3. alter vertical dimensions/height of teeth
4. verify canine relationship
5. eliminate canine discrepancy
What is the denture insertion/adjustment sequence?
1. adjust denture base
2. adjust denture borders
3. adjust occlusion in CR
4. equilibrate in lateral excursion
5. patient education
6. follow-up
Your patient has a problem with gagging when they insert their maxillary denture. What could be causing this?
- palate is excessively thick
- palatal extension too long
- lack of tongue space (teeth are set too far lingual)
- insufficient palatal seal
Instructing your patient to say "Ahh" in short, vigorous busts (i.e. perform a Valsalva maneuver) is to record the..
anterior vibrating line
1. prevention of cheek and lip biting by displacing the buccal mucosa away from the biting zone
2. prevention of tongue biting via a lingual contour of the mandibular denture
- take an intraoral bite registration
- festoon the dentures
- carve the PPS
- write up/enter your work authorization in axium
What are the common problems in the mandibular denture?
- discomfort
- poor retention/stability
- lack of support
T/F: the overall esthetics, as well as appearance of the teeth is affected by the surrounding wax.
TRUE
The PPS should end ___mm posterior to the ____.
1-2mm; fovea palatini
The action of which muscle prevents the mandibular denture from being displaced laterally during mastication?
Buccinator
How can you eliminate a canine discrepancy?
- reduce or increase overjet (move teeth F/L or change their inclination)
- reduce or increase arch circumference of one or both occlusal rims
- alter the VDO
On a denture, insufficient acrylic not allowing the tongue to seat adequately leads to what issue?
a lisp
UNDER post-damming occurs due to..
improper head and mouth positioning - this produces a space between the denture base and soft tissue