Edentulous Anatomy Diagnosis and Tx Planning Flashcards
signs of edentulism in Philtrum? Modiolus? Vermillion Border? Mento-labial fold?
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
denture returns what to face but also what does it not return?
returns lip support to the face but does not return the vertical dimension
location of pterygomandibular raphe and implications
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
retromolar pad is a good landmark for which dimensions? rate of bone resorption?
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
retro mylohyoid space? accomodates what?
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.
ankyloglossia? implication?
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
mylohyoid ridge
attachment of the mylohyoid muscle and limits the border of the denture in that area
resrobed mandibular ridge implication on the mental foramen?
mental foramen becomes closer to the surface and could cause more pain the the nerve
five major functions of saliva?
- enhance taste, speech, and swallowing
- facilitate irrigation, lubrication, and protection of mucous membrane of oral cavity as well as upper digestive tract
- provide antimicrobial and buffering activities
- promote wound healing
- denture RETENTION
inter ridge space in anterior
12 mm MINIMUM
inter ridge space in posterior
1-2 mm MINIMUM
after extraction of maxillary teeth - what is the pattern of resorption?
resorption causes the maxilla to become more narrow posteriorly
- appears to be posteriorly and superioly or up and back
after extraction of mandibular teeth - what is the pattern of resorption?
resoprtion causes the mandible to become wider posteriorly because the alveolar process that contained the teeth extended lingual to the body of the mandible
facial inclination and what class occlusion does patient become? what happens to height of the mandibular bone?
more towards class III and there is a change in the facial inclination- lass flare and the reduction in mandibular bone height
papilla on maxillary appears what after resoprtion?
appears to move forward as the bone moves back and up - posterior and superior
potential way to determine if an edentulist patient was class I, II, or III?
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
upper central is what to the incisive papilla?
6mm to the anterior to incisive papilla
T/F tongue fits in mandibualr ridge?
True - Average sized tongue is contained within the mandibular ridge
enlarged tongue? or anteriorly places?
will not be able to see the mandibular ridge
more anterior- something that can occur with parkinson’s disease - as it comes anterior
Class I - House throat form classification
180 degrees - angle at junction of hard and soft palates
Class II - House throat form classification
45 degrees - angle at junction of hard and soft palate
Class III - House throat form classification
90 degrees at angle of junction of hard and soft palate
neil’s lateral throat form classification
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?
neil’s lateral throat form classification I
Mirror not displaced during the tongue thrust
neil’s lateral throat form classification II
Mirror is partially placed during tongue thrust
neil’s lateral throat form classification III
mirror totally displaced during tongue thrust – will be most difficult in making the denture
- more height in the posterior retro-molar pad area
flabby/redundant tissue is a sign of?
result of bone loss leaving unsupported tissue
epilus fissuratum
folds that occur in tissue due to an ill-fitting denture
from hyperplasia of fibrous connective tissue
papillary hyperplasia
could be from an ill-fitting denture - not cleaned? has spaces? unwanted movement?
ridge size and shape - general
small = knife
average
large = bulbous
bony undercuts
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
maxillary tuberosity importance
used for retention purposes of maxillary
limit where we set teeth and where we set denture
compressible tissue
where?
importance?
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
lingual bony limits on the denture
mandibular foramen
genial tubercles
mylohyoid ridge
