Edentulous Anatomy Diagnosis and Tx Planning

Question 1

signs of edentulism in
Philtrum?
Modiolus?
Vermillion Border?
Mento-labial fold?

Answer 1

Philtrum – flattems
Modiolus – turning downwards
Vermillion border– rolling inward
Mento-labial fold – also inward

• purse stringing and pin striping are two words also used to describe the areas that are deepening/ flattening
• getting harder to see philtrum

Question 2

denture returns what to face but also what does it not return?

Answer 2

returns lip support to the face but does not return the vertical dimension

Question 3

location of pterygomandibular raphe and implications

Answer 3

between the hamular notches and the retromolar pads

can see it when open as wide as possible
need to accomodate for this anatomy when making the denture - relieve this area if necesary

Question 4

retromolar pad is a good landmark for which dimensions? rate of bone resorption?

Answer 4

length and height of the occlusal plane - teeth do not go there and overall an important landmark for denture fabrication
determines the occlusal plane and covered by denture for support

does not resorb at same rate as the residual ridge - with severely resorbed residual ridges- the retromolar pad remains

Question 5

retro mylohyoid space? accomodates what?

Answer 5

where the tongue will be- so if denture is too long there patient will not have the ability to move the tongue as they should.

Question 6

ankyloglossia? implication?

Answer 6

AKA - tongue tied and results in limited mobility of the tongue and usually a thicker more robust lingual frenum

• lingual frenum is on the underside of the tongue

may need frenectomy prior to denture

Question 7

mylohyoid ridge

Answer 7

attachment of the mylohyoid muscle and limits the border of the denture in that area

Question 8

resrobed mandibular ridge implication on the mental foramen?

Answer 8

mental foramen becomes closer to the surface and could cause more pain the the nerve

Question 9

five major functions of saliva?

Answer 9

1. enhance taste, speech, and swallowing
2. facilitate irrigation, lubrication, and protection of mucous membrane of oral cavity as well as upper digestive tract
3. provide antimicrobial and buffering activities
4. promote wound healing
5. denture RETENTION

Question 10

inter ridge space in anterior

Answer 10

12 mm MINIMUM

Question 11

inter ridge space in posterior

Answer 11

1-2 mm MINIMUM

Question 12

after extraction of maxillary teeth - what is the pattern of resorption?

Answer 12

resorption causes the maxilla to become more narrow posteriorly

• appears to be posteriorly and superioly or up and back

Question 13

after extraction of mandibular teeth - what is the pattern of resorption?

Answer 13

resoprtion causes the mandible to become wider posteriorly because the alveolar process that contained the teeth extended lingual to the body of the mandible

Question 14

facial inclination and what class occlusion does patient become? what happens to height of the mandibular bone?

Answer 14

more towards class III and there is a change in the facial inclination- lass flare and the reduction in mandibular bone height

Question 15

papilla on maxillary appears what after resoprtion?

Answer 15

appears to move forward as the bone moves back and up - posterior and superior

Question 16

potential way to determine if an edentulist patient was class I, II, or III?

Answer 16

use the incisive papilla as a guide
since the upper anterior should be 6 mm anterior to the incisive papilla - drop a line from the facial of the tooth to the facial of the ridge to determine the original classification

Question 17

upper central is what to the incisive papilla?

Answer 17

6mm to the anterior to incisive papilla

Question 18

T/F tongue fits in mandibualr ridge?

Answer 18

True - Average sized tongue is contained within the mandibular ridge

Question 19

enlarged tongue? or anteriorly places?

Answer 19

will not be able to see the mandibular ridge

more anterior- something that can occur with parkinson’s disease - as it comes anterior

Question 20

Class I - House throat form classification

Answer 20

180 degrees - angle at junction of hard and soft palates

Question 21

Class II - House throat form classification

Answer 21

45 degrees - angle at junction of hard and soft palate

Question 22

Class III - House throat form classification

Answer 22

90 degrees at angle of junction of hard and soft palate

Question 23

neil’s lateral throat form classification

Answer 23

movement of tongue and space in the mylohyoid region
place mirror in this space and have patient protrude the tongue
note how high the tongue goes and if they push the the mirror up?

Question 24

neil’s lateral throat form classification I

Answer 24

Mirror not displaced during the tongue thrust

Question 25

neil’s lateral throat form classification II

Answer 25

Mirror is partially placed during tongue thrust

Question 26

neil’s lateral throat form classification III

Answer 26

mirror totally displaced during tongue thrust – will be most difficult in making the denture

• more height in the posterior retro-molar pad area

Question 27

flabby/redundant tissue is a sign of?

Answer 27

result of bone loss leaving unsupported tissue

Question 28

epilus fissuratum

Answer 28

folds that occur in tissue due to an ill-fitting denture

from hyperplasia of fibrous connective tissue

Question 29

papillary hyperplasia

Answer 29

could be from an ill-fitting denture - not cleaned? has spaces? unwanted movement?

Question 30

ridge size and shape - general

Answer 30

small = knife
average
large = bulbous

Question 31

bony undercuts

Answer 31

usually from the removal of teeth and the resultant irregular resorption of the alveolar process

need to be blocked out
can be in the anterior and posterior

Question 32

maxillary tuberosity importance

Answer 32

used for retention purposes of maxillary

limit where we set teeth and where we set denture

Question 33

compressible tissue
where?
importance?

Answer 33

In hamular notches of the posterior palate

aids in determining the POSTERIOR PALATAL SEAL (POST DAM)
aids in determining the posterior limit of the denture

finding the posterior limit and measuring moveable and non-movable tissue to determine where the seal will be which will dictate the limits

Question 34

lingual bony limits on the denture

Answer 34

mandibular foramen
genial tubercles
mylohyoid ridge