6; Posterior Palatal Seal and Setting Teeth Flashcards
Where is the posterior palatal seal always located
in the soft palate not encroaching on any other structures
The purpose of the posterior palatal seal is to do what to the back of the denture
seal/dam
The posterior palatal seal prevents what
prevents food/liquid from getting under the denture base; could dislodge the denture
A tapered sunken border of the posterior palatal seal does what
makes it less conspicuous to the tongue
The posterior palatal seal provides a thick border to counteract what
dental warpage (which occurs during dimensional distortion during the curing process
The posterior palatal seal can help to reduce what
gagging, by maintaining firm contact with the tissues of the soft palate
Where is the location of the posterior palatal seal
the soft vascular tissue after the junction of the hard and soft palate, on which pressure can be applied by the denture to aid in retention
The “hard” and “soft” palate is a clinical judgment of location based on what
palpation
What are the characteristics of the hard palate
- Covering dense bone
- Fibrous
- Not depressible
- Dull in color
- No immediate vascularity
- Mid-palatal raphe
- Mid-palatal suture
What are the characteristics of the soft palate
- Devoid of covering bone.
- Non-fibrous
- Depressible.
- Reddish tissue.
- More vascular.
What area is processed inside the denture presses into the soft palate like a smooth lock and key (note: the soft palate tissue will only depress to a limit extent).
The elevated post palatal seal
What is the outline of the post palatal seal via scraping the cast
“Cupid’s bow” outline
butterfly shape
Why should you no scribe too deep in the cast
the result will be large, bullet-shaped depressions.
These will depress the soft palate too much and not retain the denture.
These are two glandular openings within the tissue, posterior of hard palate, lying on either side of midline; should be used only as a guideline for the placement of the posterior palatal seal
fovea palatini
This method is accurate for locating the fovea palatine and the vibrating line
nose-blowing method
When the fovea palatine are present where is their typical location in terms of the vibrating line
25% directly on the vibrating line
- 8% 2-3mm
- 1% 3-4mm
This is a ridged union of continouos biological tissue, narrow, low elevation in the center of the hard palate extending from incisive papilla posteriorly over length of mucosa of the hard palate, has little or no submucosa and will tolerate little or no compression.
median palatal raphe
This underlies the medial palatal raphe
medial palatal suture
This is the junction of the hard and soft palate
anterior vibrating line
This is posterior to the junction of the hard and soft palate, down the throat
posterior vibrating line
These are a thin layer of mucous membrane, not depressible; Should never be encroached upon by the denture and avoid scraping into any part
hamular notches
What are 6 important factors to identify
Junction of the hard/soft palate. Depressible/vascular soft tissue. Anterior/posterior vibrating lines? Hamular notches Location of fovea palatini Location of mid-palatine suture
What are seven structures to avoid
Fovea palatini Fibrous raphe Hard palate/fibrous tissue Median palatine suture Hamular notch Tuberosities Maxillary tori in post-palatal area must be surgically removed
This is a sanitary, disposable, time-saving, easy to use, instant positive reaction with disposable applicators used for making color transfers from irritated areas under full dentures, partial, etc; designed for user and patient.
Dr. Thompson’s Color Transfer Applicators
Extraction of teeth for dentures requires what to happen
aveoloplasty
The proper placement of denture teeth should do these two things
support the lip in the anterior
should be supported by the edentulous ridge as much as possible.
Place the teeth over what
the crest of the ridge as much as possible for bony support
This should marked on the land areas of the maxillary and mandibular casts.
the middle of the depth of the vestibule
How should you mark the midline of the patient’s face
by placing a dot on the incisive papilla and marking this midline on the maxillary anterior land area, extending down the front of the cast
For midline, measure down intraorally from what
the facial frenum
which shade should you avoid when selecting denture teeth
extreme white
This is a risk factor of denture dissatisfaction
depression
Always reduce/grind/thin out what first
base plate
When viewed facially, the incisal edges of all maxillary anterior teeth are tilted which way
mesially
Which tooth is inclined most, on the maxillary anterior
The lateral incisor is inclined the most, and raised 1-2mm above the plane.
When viewed laterally, the incisors are depressed where.
The lateral incisor being most depressed
at the cervical
This maxillary tooth is straight with the long axis perpendicular to the occlusal plane.
canine
What are four things to be aware of when making the proper alignment
Make sure incisal edges of the maxillary teeth do not rest on the crest of the mandibular lip.
Symmetrical, pleasing.
Mark the midline – actual facial midline, center of philtrum, facial frenum, incisive papilla.
Proper placement of the midline is instrumental in setting anterior denture teeth.
These teeth contact the flat plate resting on the occlusal plane.
central incisors
Set the remainder of the anterior teeth according to what
the curve defined by the plastic ruler
Which surfaces of teeth should touch the plastic ruler
labioincisal line angle of the incisors
midbuccal surface of the canine.
Which anterior teeth do not touch the occlusal plane
laterals
When setting teeth, there cannot be this
severe overjet
Teeth cannot be positioned further forward than what, determined by a line drawn form the depth of the vestibule and perpendicularto a line drawn parallel to the occlusal plane. The further forward a tooth extends beyond this point, the more it acts as a lever to dislodge the denture.
the depth of the vestibule
