6; Posterior Palatal Seal and Setting Teeth

Question 1

Where is the posterior palatal seal always located

Answer 1

in the soft palate not encroaching on any other structures

Question 2

The purpose of the posterior palatal seal is to do what to the back of the denture

Answer 2

seal/dam

Question 3

The posterior palatal seal prevents what

Answer 3

prevents food/liquid from getting under the denture base; could dislodge the denture

Question 4

A tapered sunken border of the posterior palatal seal does what

Answer 4

makes it less conspicuous to the tongue

Question 5

The posterior palatal seal provides a thick border to counteract what

Answer 5

dental warpage (which occurs during dimensional distortion during the curing process

Question 6

The posterior palatal seal can help to reduce what

Answer 6

gagging, by maintaining firm contact with the tissues of the soft palate

Question 7

Where is the location of the posterior palatal seal

Answer 7

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

Question 8

The “hard” and “soft” palate is a clinical judgment of location based on what

Answer 8

palpation

Question 9

What are the characteristics of the hard palate

Answer 9

• Covering dense bone
• Fibrous
• Not depressible
• Dull in color
• No immediate vascularity
• Mid-palatal raphe
• Mid-palatal suture

Question 10

What are the characteristics of the soft palate

Answer 10

• Devoid of covering bone.
• Non-fibrous
• Depressible.
• Reddish tissue.
• More vascular.

Question 11

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).

Answer 11

The elevated post palatal seal

Question 12

What is the outline of the post palatal seal via scraping the cast

Answer 12

“Cupid’s bow” outline

butterfly shape

Question 13

Why should you no scribe too deep in the cast

Answer 13

the result will be large, bullet-shaped depressions.

These will depress the soft palate too much and not retain the denture.

Question 14

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

Answer 14

fovea palatini

Question 15

This method is accurate for locating the fovea palatine and the vibrating line

Answer 15

nose-blowing method

Question 16

When the fovea palatine are present where is their typical location in terms of the vibrating line

Answer 16

25% directly on the vibrating line

18. 8% 2-3mm
19. 1% 3-4mm

Question 17

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.

Answer 17

median palatal raphe

Question 18

This underlies the medial palatal raphe

Answer 18

medial palatal suture

Question 19

This is the junction of the hard and soft palate

Answer 19

anterior vibrating line

Question 20

This is posterior to the junction of the hard and soft palate, down the throat

Answer 20

posterior vibrating line

Question 21

These are a thin layer of mucous membrane, not depressible; Should never be encroached upon by the denture and avoid scraping into any part

Answer 21

hamular notches

Question 22

What are 6 important factors to identify

Answer 22

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

Question 23

What are seven structures to avoid

Answer 23

Fovea palatini
Fibrous raphe
Hard palate/fibrous tissue
Median palatine suture
Hamular notch
Tuberosities
Maxillary tori in post-palatal area 
must be surgically removed

Question 24

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.

Answer 24

Dr. Thompson’s Color Transfer Applicators

Question 25

Extraction of teeth for dentures requires what to happen

Answer 25

aveoloplasty

Question 26

The proper placement of denture teeth should do these two things

Answer 26

support the lip in the anterior

should be supported by the edentulous ridge as much as possible.

Question 27

Place the teeth over what

Answer 27

the crest of the ridge as much as possible for bony support

Question 28

This should marked on the land areas of the maxillary and mandibular casts.

Answer 28

the middle of the depth of the vestibule

Question 29

How should you mark the midline of the patient’s face

Answer 29

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

Question 30

For midline, measure down intraorally from what

Answer 30

the facial frenum

Question 31

which shade should you avoid when selecting denture teeth

Answer 31

extreme white

Question 32

This is a risk factor of denture dissatisfaction

Answer 32

depression

Question 33

Always reduce/grind/thin out what first

Answer 33

base plate

Question 34

When viewed facially, the incisal edges of all maxillary anterior teeth are tilted which way

Answer 34

mesially

Question 35

Which tooth is inclined most, on the maxillary anterior

Answer 35

The lateral incisor is inclined the most, and raised 1-2mm above the plane.

Question 36

When viewed laterally, the incisors are depressed where.

The lateral incisor being most depressed

Answer 36

at the cervical

Question 37

This maxillary tooth is straight with the long axis perpendicular to the occlusal plane.

Answer 37

canine

Question 38

What are four things to be aware of when making the proper alignment

Answer 38

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.

Question 39

These teeth contact the flat plate resting on the occlusal plane.

Answer 39

central incisors

Question 40

Set the remainder of the anterior teeth according to what

Answer 40

the curve defined by the plastic ruler

Question 41

Which surfaces of teeth should touch the plastic ruler

Answer 41

labioincisal line angle of the incisors

midbuccal surface of the canine.

Question 42

Which anterior teeth do not touch the occlusal plane

Answer 42

laterals

Question 43

When setting teeth, there cannot be this

Answer 43

severe overjet

Question 44

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.

Answer 44

the depth of the vestibule